Dimensional Benchmarking of String Splitting SQL

I noticed a question on AskTom last November concerning SQL for splitting delimited strings, Extract domain names from a column having multiple email addresses, a kind of question that arises frequently on the forums. There was some debate between reviewers Rajeshwaran Jeyabal, Stew Ashton and the AskTom guys on whether an XML-based solution performs better or worse than a more 'classic' solution based on the Substr and Instr functions and collections. AskTom's Chris Saxon noted:

For me this just highlights the importance of testing in your own environment with your own data. Just because someone produced a benchmark showing X is faster, doesn't mean it will be for you.

For me, relative performance is indeed frequently dependent on the size and 'shape' of the data used for testing. As I have my own 'dimensional' benchmarking framework, A Framework for Dimensional Benchmarking of SQL Performance, I was able to very quickly adapt Rajesh's test data to benchmark across numbers of records and numbers of delimiters, and I put the results on the thread. I then decided to take the time to expand the scope to include other solutions, and to use more general data sets, where the token lengths vary as well as the number of tokens per record.

In fact the scope expanded quite a bit, as I found more and more ways to solve the problem, and I have only now found the time to write it up. Here is a list of all the queries considered:

Queries using Connect By for row generation

  • MUL_QRY - Cast/Multiset to correlate Connect By
  • LAT_QRY - v12 Lateral correlated Connect By
  • UNH_QRY - Uncorrelated Connect By unhinted
  • RGN_QRY - Uncorrelated Connect By with leading hint
  • GUI_QRY - Connect By in main query using sys_guid trick
  • RGX_QRY - Regular expression function, Regexp_Substr

Queries not using Connect By for row generation

  • XML_QRY - XMLTABLE
  • MOD_QRY - Model clause
  • PLF_QRY - database pipelined function
  • WFN_QRY - 'WITH' PL/SQL function directly in query
  • RSF_QRY - Recursive Subquery Factor
  • RMR_QRY - Match_Recognize

Test Problem

DELIMITED_LISTS Table

CREATE TABLE delimited_lists(id INT, list_col VARCHAR2(4000))
/

Functional Test Data

The test data consist of pipe-delimited tokens ('|') in a VARCHAR2(4000) column in a table with a separate integer unique identifier. For functional testing we will add a single 'normal' record with two tokens, plus four more records designed to validate null-token edge cases as follows:

  1. Normal case, two tokens
  2. Leading null token, then two not null tokens
  3. Trailing null token, after two not null tokens
  4. Two not null tokens, with a null token in the middle
  5. Two null tokens only
     ID LIST_COL
------- ------------------------------------------------------------
      1 token_11|token_12
      2 |token_21|token_22
      3 token_31|token_32|
      4 token_41||token_42
      5 |

Functional Test Results

     ID TOKEN
------- ----------
      1 token_11
      1 token_12
      2
      2 token_21
      2 token_22
      3 token_31
      3 token_32
      3
      4 token_41
      4
      4 token_42
      5
      5

13 rows selected.

All queries returned the expected results above, except that the XML query returned 12 rows with only a single null token returned for record 5. In the performance testing, no null tokens were included, and all queries returned the same results.

Performance Test Data

Each test set consisted of 3,000 records with the list_col column containing the delimited string dependent on width (w) and depth (d) parameters, as follows:

  • Each record contains w tokens
  • Each token contains d characters from the sequence 1234567890 repeated as necessary

The output from the test queries therefore consists of 3,000*w records with a unique identifier and a token of length d. For performance testing purposes the benchmarking framework writes the results to a file in csv format, while counting only the query steps in the query timing results.

In Oracle upto version 11.2 VARCHAR2 expressions cannot be longer than 4,000 characters, so I decided to run the framework for four sets of parameters, as follows:

  • Depth fixed, high; width range low: d=18, w=(50,100,150,200)
  • Depth fixed, low; width range high: d=1, w=(450,900,1350,1800)
  • Width fixed, low; depth range high: w=5, d=(195,390,585,780)
  • Width fixed, high; depth range low: w=150, d=(6,12,18,24)

All the queries showed strong time correlation with width, while a few also showed strong correlation with depth.

Queries

All execution plans are from the data point with Width=1800, Depth=1, which has the largest number of tokens per record.

Multiset Query (MUL_QRY)

SELECT d.id   id,
       Substr (d.list_col, Instr ('|' || d.list_col, '|', 1, t.COLUMN_VALUE), Instr (d.list_col || '|', '|', 1, t.COLUMN_VALUE) - Instr ('|' || d.list_col, '|', 1, t.COLUMN_VALUE)) token
  FROM delimited_lists d, 
       TABLE (CAST (MULTISET (SELECT LEVEL FROM DUAL CONNECT BY LEVEL <= Nvl (Length(d.list_col), 0) - Nvl (Length (Replace (d.list_col, '|')), 0) + 1) AS SYS.ODCINumberlist)) t

Plan hash value: 462687286

--------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                           | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                    |                 |      1 |        |   5400K|00:01:52.86 |    3009 |       |       |          |
|   1 |  NESTED LOOPS                       |                 |      1 |     24M|   5400K|00:01:52.86 |    3009 |       |       |          |
|   2 |   TABLE ACCESS FULL                 | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    3009 |       |       |          |
|   3 |   COLLECTION ITERATOR SUBQUERY FETCH|                 |   3000 |   8168 |   5400K|00:01:49.96 |       0 |       |       |          |
|   4 |    CONNECT BY WITHOUT FILTERING     |                 |   3000 |        |   5400K|00:01:48.83 |       0 |  2048 |  2048 | 2048  (0)|
|   5 |     FAST DUAL                       |                 |   3000 |      1 |   3000 |00:00:00.01 |       0 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------

Notes on MUL_QRY

This is the 'classic' CONNECT BY solution referred to above, which appears frequently on AskTom and elsewhere, and I copied the version used by Jayesh. The somewhat convoluted casting between subquery and array and back to SQL record via multiset allows the prior table in the from list to be referenced within the inline view, which is otherwise not permitted in versions earlier than 12.1, where the LATERAL keyword was introduced.

Despite this query being regarded as the 'classic' CONNECT BY solution to string-splitting, we will find that it is inferior in performance to a query I wrote myself across all data points considered. The new query is also simpler, but is not the most efficient of all methods, as we see later.

Lateral Query (LAT_QRY)

SELECT d.id                id,
       l.subs              token
FROM delimited_lists d
CROSS APPLY (
  SELECT Substr (d.list_col, pos + 1, Lead (pos, 1, 4000) OVER (ORDER BY pos) - pos - 1) subs, pos
    FROM (
    SELECT Instr (d.list_col, '|', 1, LEVEL) pos
      FROM DUAL
    CONNECT BY
      LEVEL <= Length (d.list_col) - Nvl (Length (Replace (d.list_col, '|')), 0) + 1
    )
) l

Plan hash value: 631504984

-----------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                        | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-----------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                 |                 |      1 |        |   5400K|00:15:41.97 |    3009 |       |       |          |
|   1 |  NESTED LOOPS                    |                 |      1 |   3000 |   5400K|00:15:41.97 |    3009 |       |       |          |
|   2 |   TABLE ACCESS FULL              | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    3009 |       |       |          |
|   3 |   VIEW                           | VW_LAT_2D0B8FC8 |   3000 |      1 |   5400K|00:02:02.67 |       0 |       |       |          |
|   4 |    WINDOW SORT                   |                 |   3000 |      1 |   5400K|00:02:00.59 |       0 | 43008 | 43008 |38912  (0)|
|   5 |     VIEW                         |                 |   3000 |      1 |   5400K|00:01:58.78 |       0 |       |       |          |
|   6 |      CONNECT BY WITHOUT FILTERING|                 |   3000 |        |   5400K|00:01:48.53 |       0 |  2048 |  2048 | 2048  (0)|
|   7 |       FAST DUAL                  |                 |   3000 |      1 |   3000 |00:00:00.01 |       0 |       |       |          |
-----------------------------------------------------------------------------------------------------------------------------------------

Notes on LAT_QRY

This query is taken from Splitting Strings: Proof!, and uses a v12.1 new feature, described with examples in LATERAL Inline Views. The new feature allows you to correlate an inline view directly without the convoluted Multiset code, and can also be used with the keywords CROSS APPLY instead of LATERAL. It's sometimes regarded as having peformance advantages, but in this context we will see that avoiding this correlation altogether is best for performance.

Row-generator Query, Unhinted and Hinted (UNH_QRY and RGN_QRY)

Unhinted Query

WITH row_gen AS (
        SELECT LEVEL rn FROM DUAL CONNECT BY LEVEL <= 
            (SELECT Max (Nvl (Length(list_col), 0) - Nvl (Length (Replace (list_col,'|')), 0) + 1)
               FROM delimited_lists)
)
SELECT d.id   id,
       Substr (d.list_col, Instr ('|' || d.list_col, '|', 1, r.rn), Instr (d.list_col || '|', '|', 1, r.rn) - Instr ('|' || d.list_col, '|', 1, r.rn)) token
  FROM delimited_lists d
  JOIN row_gen r
    ON r.rn <= Nvl (Length(d.list_col), 0) - Nvl (Length (Replace (d.list_col,'|')), 0) + 1

Plan hash value: 747926158

---------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                      | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT               |                 |      1 |        |   5400K|00:01:55.35 |    2717K|       |       |          |
|   1 |  NESTED LOOPS                  |                 |      1 |    150 |   5400K|00:01:55.35 |    2717K|       |       |          |
|   2 |   VIEW                         |                 |      1 |      1 |   1800 |00:00:07.39 |    1509 |       |       |          |
|   3 |    CONNECT BY WITHOUT FILTERING|                 |      1 |        |   1800 |00:00:07.39 |    1509 |  2048 |  2048 | 2048  (0)|
|   4 |     FAST DUAL                  |                 |      1 |      1 |      1 |00:00:00.01 |       0 |       |       |          |
|   5 |     SORT AGGREGATE             |                 |      1 |      1 |      1 |00:00:00.06 |    1509 |       |       |          |
|   6 |      TABLE ACCESS FULL         | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    1509 |       |       |          |
|*  7 |   TABLE ACCESS FULL            | DELIMITED_LISTS |   1800 |    150 |   5400K|00:01:53.61 |    2716K|       |       |          |
---------------------------------------------------------------------------------------------------------------------------------------

Execution Plan with Hint /*+ leading (d) */

Plan hash value: 1241630378

----------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                       | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
----------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                |                 |      1 |        |   5400K|00:00:02.37 |    3018 |       |       |          |
|   1 |  MERGE JOIN                     |                 |      1 |    150 |   5400K|00:00:02.37 |    3018 |       |       |          |
|   2 |   SORT JOIN                     |                 |      1 |   3000 |   3000 |00:00:00.07 |    1509 |    11M|  1318K|   10M (0)|
|   3 |    TABLE ACCESS FULL            | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    1509 |       |       |          |
|*  4 |   SORT JOIN                     |                 |   3000 |      1 |   5400K|00:00:01.42 |    1509 |   160K|   160K|  142K (0)|
|   5 |    VIEW                         |                 |      1 |      1 |   1800 |00:00:07.37 |    1509 |       |       |          |
|   6 |     CONNECT BY WITHOUT FILTERING|                 |      1 |        |   1800 |00:00:07.37 |    1509 |  2048 |  2048 | 2048  (0)|
|   7 |      FAST DUAL                  |                 |      1 |      1 |      1 |00:00:00.01 |       0 |       |       |          |
|   8 |      SORT AGGREGATE             |                 |      1 |      1 |      1 |00:00:00.06 |    1509 |       |       |          |
|   9 |       TABLE ACCESS FULL         | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    1509 |       |       |          |
----------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   4 - access(INTERNAL_FUNCTION("R"."RN")<=NVL(LENGTH("D"."LIST_COL"),0)-NVL(LENGTH(REPLACE("D"."LIST_COL",'|')),0)+1)
       filter(INTERNAL_FUNCTION("R"."RN")<=NVL(LENGTH("D"."LIST_COL"),0)-NVL(LENGTH(REPLACE("D"."LIST_COL",'|')),0)+1)

Notes on UNH_QRY and RGN_QRY

I wrote the UNH_QRY query in an attempt to avoid the convoluted Multiset approach of the 'classic' solution. The reason for the use of arrays and Multiset seems to be that, while we need to 'generate' multiple rows for each source row, the number of rows generated has to vary by source record and so the row-generating inline view computes the number of tokens for each record in its where clause.

The use of row-generating subqueries is quite common, but in other cases one often has a fixed number of rows to generate, as in data densification scenarios for example. It occurred to me that, although we don't know the number to generate, we do have an upper bound, dependent on the maximum number of characters, and we could generate that many in a subquery, then join only as many as are required to the source record.

This approach resulted in a simpler and more straightforward query, but it turned out in its initial form to be very slow. The execution plan above shows that the row generator is driving a nested loops join within which a full scan is performed on the table. The CBO is not designed to optimise this type of algorithmic query, so I added a leading hint to reverse the join order, and this resulted in much better performance. In fact, as we see later the hinted query outperforms the other CONNECT BY queries, including the v12.1 LAT_QRY query at all data points considered.

sys_guid Query (GUI_QRY)

WITH guid_cby AS (
  SELECT id, level rn, list_col,Instr ('|' || d.list_col, '|', 1, LEVEL) pos
    FROM delimited_lists d
  CONNECT BY prior id = id and prior sys_guid() is not null and
    LEVEL <= Length (d.list_col) - Nvl (Length (Replace (d.list_col, '|')), 0) + 1
)
SELECT id  id, 
       Substr (list_col, pos, Lead (pos, 1, 4000) OVER (partition by id ORDER BY pos) - pos - 1) token
  FROM guid_cby

Plan hash value: 240527573

-------------------------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                      | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers | Reads  | Writes |  OMem |  1Mem | Used-Mem | Used-Tmp|
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT               |                 |      1 |        |   5400K|00:14:12.07 |   77412 |   2404K|   2404K|       |       |          |         |
|   1 |  WINDOW SORT                   |                 |      1 |   3000 |   5400K|00:14:12.07 |   77412 |   2404K|   2404K|    20G|    45M|  163M (0)|      18M|
|   2 |   VIEW                         |                 |      1 |   3000 |   5400K|00:04:07.47 |    1509 |      0 |      0 |       |       |          |         |
|*  3 |    CONNECT BY WITHOUT FILTERING|                 |      1 |        |   5400K|00:03:55.99 |    1509 |      0 |      0 |    12M|  1343K|   10M (0)|         |
|   4 |     TABLE ACCESS FULL          | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    1509 |      0 |      0 |       |       |          |         |
-------------------------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   3 - access("ID"=PRIOR NULL)

Notes on GUI_QRY

This query also generates rows using CONNECT BY, but differs from the others shown by integrating the row-generation code with the main rowset and avoiding a separate subquery against DUAL. This seems to be a more recent approach than the traditional Multiset solution. It uses a trick involving the system function sys_guid() to avoid the 'connect by cycle' error that you would otherwise get, as explained in this OTN thread: Reg : sys_guid()
.

Unfortunately, and despite its current popularity on OTN, it turns out to be even less efficient than the earlier approaches, by quite a margin.

Regex Query (RGX_QRY)

WITH row_gen AS (
        SELECT LEVEL rn FROM DUAL CONNECT BY LEVEL < 2000
)
SELECT d.id   id,
       RTrim (Regexp_Substr (d.list_col || '|', '(.*?)\|', 1, r.rn), '|') token
  FROM delimited_lists d
  JOIN row_gen r
    ON r.rn <= Nvl (Length(d.list_col), 0) - Nvl (Length (Replace (d.list_col,'|')), 0) + 1

Plan hash value: 1537360357

----------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                       | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
----------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                |                 |      1 |        |   5400K|00:00:03.35 |    1509 |       |       |          |
|   1 |  MERGE JOIN                     |                 |      1 |    150 |   5400K|00:00:03.35 |    1509 |       |       |          |
|   2 |   SORT JOIN                     |                 |      1 |   3000 |   3000 |00:00:00.07 |    1509 |    11M|  1318K|   10M (0)|
|   3 |    TABLE ACCESS FULL            | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    1509 |       |       |          |
|*  4 |   SORT JOIN                     |                 |   3000 |      1 |   5400K|00:00:01.75 |       0 |   160K|   160K|  142K (0)|
|   5 |    VIEW                         |                 |      1 |      1 |   1999 |00:00:00.01 |       0 |       |       |          |
|   6 |     CONNECT BY WITHOUT FILTERING|                 |      1 |        |   1999 |00:00:00.01 |       0 |  2048 |  2048 | 2048  (0)|
|   7 |      FAST DUAL                  |                 |      1 |      1 |      1 |00:00:00.01 |       0 |       |       |          |
----------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   4 - access(INTERNAL_FUNCTION("R"."RN")<=NVL(LENGTH("D"."LIST_COL"),0)-NVL(LENGTH(REPLACE("D"."LIST_COL",'|')),0)+1)
       filter(INTERNAL_FUNCTION("R"."RN")<=NVL(LENGTH("D"."LIST_COL"),0)-NVL(LENGTH(REPLACE("D"."LIST_COL",'|')),0)+1)

Notes on RGX_QRY

This query also generates rows using CONNECT BY, but differs from the others shown by using regular expressions to do the token parsing, which is simpler than the Substr/Instr approaches.

This seems to be quite popular, but it's well known that regular expression processing can be bad for performance, and so it proves here, with CPU time increasing quadratically with number of tokens.

XML Query (XML_QRY)

SELECT id   id,
       x2   token
  FROM delimited_lists, XMLTable(
    'if (contains($X2,"|")) then ora:tokenize($X2,"\|") else $X2'
  PASSING list_col AS x2
  COLUMNS x2 VARCHAR2(4000) PATH '.'
)

Plan hash value: 2423482301

----------------------------------------------------------------------------------------------------------------------
| Id  | Operation                          | Name                  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
----------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                   |                       |      1 |        |   5400K|00:00:10.85 |    3009 |
|   1 |  NESTED LOOPS                      |                       |      1 |     24M|   5400K|00:00:10.85 |    3009 |
|   2 |   TABLE ACCESS FULL                | DELIMITED_LISTS       |      1 |   3000 |   3000 |00:00:00.01 |    3009 |
|   3 |   COLLECTION ITERATOR PICKLER FETCH| XQSEQUENCEFROMXMLTYPE |   3000 |   8168 |   5400K|00:00:03.49 |       0 |
----------------------------------------------------------------------------------------------------------------------

Notes on XML_QRY

This query using XMLTable is copied from the version used by Jayesh in the AskTom thread above.

Model Query (MOD_QRY)

SELECT id      id,
       token   token
  FROM delimited_lists
 MODEL
    PARTITION BY (id)
    DIMENSION BY (1 rn)
    MEASURES (CAST('' AS VARCHAR2(4000)) AS token, '|' || list_col || '|' list_col, 2 pos, 0 nxtpos, Length(list_col) + 2 len)
    RULES ITERATE (2000) UNTIL pos[1] > len[1] (
       nxtpos[1] = Instr (list_col[1], '|', pos[1], 1),
       token[iteration_number+1] = Substr (list_col[1], pos[1], nxtpos[1] - pos[1]),
       pos[1] = nxtpos[1] + 1
    )

Plan hash value: 1656081500

-------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers | Reads  | Writes |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |                 |      1 |        |   5400K|03:10:43.97 |    1509 |   2883 |   2883 |       |       |          |
|   1 |  SQL MODEL ORDERED FAST|                 |      1 |   3000 |   5400K|03:10:43.97 |    1509 |   2883 |   2883 |  2047M|   112M| 2844M (1)|
|   2 |   TABLE ACCESS FULL    | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    1509 |      0 |      0 |       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------------

Notes on MOD_QRY

I wrote this query using the Model clause, available since Oracle Database version 10, for this article.

The Model clause has something of a reputation for poor performance, and this was one of the slower methods, with CPU time increasing quadratically with number of tokens.

Pipelined Function Query (PLF_QRY)

Pipelined Function Strings.Split

FUNCTION Split (p_string VARCHAR2, p_delim VARCHAR2) RETURN L1_chr_db_arr PIPELINED IS

  c_delim_len   CONSTANT SIMPLE_INTEGER := Length(p_delim);
  l_token_start          SIMPLE_INTEGER := 1;
  l_next_delim           SIMPLE_INTEGER := Instr (p_string, p_delim, l_token_start, 1);

BEGIN

  WHILE l_next_delim > 0 LOOP
    PIPE ROW (Substr (p_string, l_token_start, l_next_delim - l_token_start));
    l_token_start := l_next_delim + c_delim_len;
    l_next_delim := Instr (p_string || p_delim, p_delim, l_token_start, 1);
  END LOOP;

END Split;

Query Using Pipelined Function

SELECT d.id                id,
       s.COLUMN_VALUE      token
  FROM delimited_lists d
 CROSS JOIN TABLE (Strings.Split(d.list_col, '|')) s
Plan hash value: 2608399241

----------------------------------------------------------------------------------------------------------------
| Id  | Operation                          | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
----------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                   |                 |      1 |        |   5400K|00:00:03.08 |    3009 |
|   1 |  NESTED LOOPS                      |                 |      1 |     24M|   5400K|00:00:03.08 |    3009 |
|   2 |   TABLE ACCESS FULL                | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    3009 |
|   3 |   COLLECTION ITERATOR PICKLER FETCH| SPLIT           |   3000 |   8168 |   5400K|00:00:01.87 |       0 |
----------------------------------------------------------------------------------------------------------------

Notes on PLF_QRY

This is a fairly well known approach to the problem that involves doing the string splitting within a pipelined database function that is passed the delimited string as a parameter. I wrote my own version for this article, taking care to make only one call to each of the oracle functions Instr and Substr within a loop over the tokens.

The results confirm that it is in fact the fastest approach over all data points considered, and CPU time increased approximately linearly with number of tokens.

With Function v12.1 Query (WFN_QRY)

WITH FUNCTION Split (p_string VARCHAR2, p_delim VARCHAR2) RETURN L1_chr_db_arr IS
  c_delim_len   CONSTANT SIMPLE_INTEGER := Length(p_delim);
  l_token_start          SIMPLE_INTEGER := 1;
  l_next_delim           SIMPLE_INTEGER := Instr (p_string, p_delim, l_token_start, 1);
  l_ret_arr              L1_chr_db_arr := L1_chr_db_arr();

BEGIN

  WHILE l_next_delim > 0 LOOP
    l_ret_arr.EXTEND;
    l_ret_arr(l_ret_arr.COUNT) := Substr (p_string, l_token_start, l_next_delim - l_token_start);
    l_token_start := l_next_delim + c_delim_len;
    l_next_delim := Instr (p_string || p_delim, p_delim, l_token_start, 1);
  END LOOP;
  RETURN l_ret_arr;

END Split;
SELECT d.id                id,
       s.COLUMN_VALUE      token
  FROM delimited_lists d
 CROSS JOIN TABLE (Split(d.list_col, '|')) s

Plan hash value: 2608399241

----------------------------------------------------------------------------------------------------------------
| Id  | Operation                          | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
----------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                   |                 |      1 |        |   5400K|00:00:17.56 |    3009 |
|   1 |  NESTED LOOPS                      |                 |      1 |     24M|   5400K|00:00:17.56 |    3009 |
|   2 |   TABLE ACCESS FULL                | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    3009 |
|   3 |   COLLECTION ITERATOR PICKLER FETCH| SPLIT           |   3000 |   8168 |   5400K|00:00:02.57 |       0 |
----------------------------------------------------------------------------------------------------------------

Notes on WFN_QRY

Oracle introduced the ability to include a PL/SQL function definition directly in a query in version 12.1. I converted my pipelined function into a function within a query, returning an array of character strings.

As we would expect from the results of the similar pipelined function approach, this also turns out to be a very efficient solution. However, it may be surprising to many that it is significantly slower (20-30%) than using the separate database function, given the prominence that is usually assigned to context-switching.

Recursive Subquery Factor Query (RSF_QRY)

WITH rsf (id, token, nxtpos, nxtpos2, list_col, len, iter) AS
(
SELECT id,
       Substr (list_col, 1, Instr (list_col || '|', '|', 1, 1) - 1),
       Instr (list_col || '|', '|', 1, 1) + 1,
       Instr (list_col || '|', '|', 1, 2),
       list_col || '|',
       Length (list_col) + 1,
       1
  FROM delimited_lists
UNION ALL
SELECT id,
       Substr (list_col, nxtpos, nxtpos2 - nxtpos),
       nxtpos2 + 1,
       Instr (list_col, '|', nxtpos2 + 1, 1),
       list_col,
       len,
       iter + 1
  FROM rsf r
 WHERE nxtpos <= len
)
SELECT
       id       id,
       token    token
  FROM rsf

Plan hash value: 2159872273

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                 | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                          |                 |      1 |        |   5400K|03:27:56.79 |    1434M|       |       |          |
|   1 |  VIEW                                     |                 |      1 |   6000 |   5400K|03:27:56.79 |    1434M|       |       |          |
|   2 |   UNION ALL (RECURSIVE WITH) BREADTH FIRST|                 |      1 |        |   5400K|03:27:45.02 |    1434M|    12M|  1343K|   10M (0)|
|   3 |    TABLE ACCESS FULL                      | DELIMITED_LISTS |      1 |   3000 |   3000 |00:00:00.01 |    1509 |       |       |          |
|   4 |    RECURSIVE WITH PUMP                    |                 |   1800 |        |   5397K|00:00:04.48 |       0 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Notes on RSF_QRY

Oracle introduced recursive subquery factoring in v11.2, as an Ansi standard approach to SQL recursion, and with greater power than the older CONNECT BY recursion. I wrote the query for this article.

The query turned out to be surprisingly simple in structure, but for large numbers of tokens it was by far the slowest, and CPU time increased quadratically with number of tokens.

Match Recognize Query (RMR_QRY)

WITH row_gen AS (
        SELECT LEVEL rn FROM DUAL CONNECT BY LEVEL <= 4000
), char_streams AS (
SELECT d.id, r.rn, Substr (d.list_col || '|', r.rn, 1) chr
  FROM delimited_lists d
  JOIN row_gen r
    ON r.rn <= Nvl (Length(d.list_col), 0) + 2
), chars_grouped AS (
SELECT *
  FROM char_streams
 MATCH_RECOGNIZE (
   PARTITION BY id
   ORDER BY rn
   MEASURES chr mchr,
            FINAL COUNT(*) n_chrs,
            MATCH_NUMBER() mno
      ALL ROWS PER MATCH
  PATTERN (c*? d)
   DEFINE d AS d.chr = '|'
  ) m
)
SELECT id   id, 
       RTrim (Listagg (chr, '') WITHIN GROUP (ORDER BY rn), '|') token
  FROM chars_grouped
GROUP BY id, mno

Plan hash value: 2782416907

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                          | Name            | Starts | E-Rows | A-Rows |   A-Time   | Buffers | Reads  | Writes |  OMem |  1Mem | Used-Mem | Used-Tmp|
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                   |                 |      1 |        |   5400K|00:00:52.53 |    6036K|    103K|    103K|       |       |          |         |
|   1 |  SORT GROUP BY                     |                 |      1 |    150 |   5400K|00:00:52.53 |    6036K|    103K|    103K|   330M|  6949K|   97M (1)|     395K|
|   2 |   VIEW                             |                 |      1 |    150 |     10M|00:00:53.55 |    6036K|  52539 |  52539 |       |       |          |         |
|   3 |    MATCH RECOGNIZE SORT            |                 |      1 |    150 |     10M|00:00:51.47 |    6036K|  52539 |  52539 |   231M|  5084K|  163M (1)|         |
|   4 |     VIEW                           |                 |      1 |    150 |     10M|00:00:18.75 |    6036K|      0 |      0 |       |       |          |         |
|   5 |      NESTED LOOPS                  |                 |      1 |    150 |     10M|00:00:11.76 |    6036K|      0 |      0 |       |       |          |         |
|   6 |       VIEW                         |                 |      1 |      1 |   4000 |00:00:00.01 |       0 |      0 |      0 |       |       |          |         |
|   7 |        CONNECT BY WITHOUT FILTERING|                 |      1 |        |   4000 |00:00:00.01 |       0 |      0 |      0 |  2048 |  2048 | 2048  (0)|         |
|   8 |         FAST DUAL                  |                 |      1 |      1 |      1 |00:00:00.01 |       0 |      0 |      0 |       |       |          |         |
|*  9 |       TABLE ACCESS FULL            | DELIMITED_LISTS |   4000 |    150 |     10M|00:00:10.12 |    6036K|      0 |      0 |       |       |          |         |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   9 - filter("R"."RN"<=NVL(LENGTH("D"."LIST_COL"),0)+2)

Notes on RMR_QRY

Oracle introduced Match_Recognize in v12.1, as a mechanism for pattern matching along the lines of regular expressions for strings, but for matching patterns across records. I wrote the query for this article, converting each character in the input strings into a separate record to allow for its use.

This approach might seems somewhat convoluted, and one might expect it to be correspondingly slow. As it turns out though, for most datasets it is faster than many of the other methods, the ones with very long tokens being the exception, and CPU time increased linearly with both number of tokens and number of characters per token. It is notable that, apart from the exception mentioned, it outperformed the regular expression query.

Performance Results

In the tables below, we will include some expressions used in Dimensional Benchmarking of Bracket Parsing SQL:

  • LRTB = Ratio to best time at high data point
  • RTP_L = Linear ratio as defined in the link above, averaged over successive data points
  • RTP_Q = Quadratic ratio as defined in the link above, averaged over successive data points

The CPU times are listed but elapsed times are much the same. Each table has columns in order of increasing last CPU time by query.

Depth fixed, high; width range low: d=18, w=(50,100,150,200)

Depth fixed, low; width range high: d=1, w=(450,900,1350,1800)

Width fixed, low; depth range high: w=5, d=(195,390,585,780)


Width fixed, high; depth range low: w=150, d=(6,12,18,24)

A Note on the Row Generation by Connect By Results

It is interesting to observe that the 'classical' mechanism for row-generation in string-splitting and similar scenarios turns out to be much slower than a simpler approach that removes the correlation of the row-generating subquery. This 'classical' mechanism has been proposed on Oracle forums over many years, while a simpler and faster approach seems to have gone undiscovered. The reason for its performance deficit is simply that running a Connect By query for every master row is unsurprisingly inefficient. The Use of the v12.1 LATERAL correlation syntax simplifies but doesn't improve performance by much.

The more recent approach to Connect By row-generation is to use the sys_guid 'trick' to embed the Connect By in the main query rather than in a correlated subquery, and this has become very popular on forums such as OTN. As we have seen, although simpler, this is even worse for performance: Turning the whole query into a tree-walk isn't good for performance either. It's better to isolate the tree-walk, execute it once, and then just join its result set as in RGN_QRY.

Conclusions

  • The database pipelined function solution (PLF_QRY) is generally the fastest across all data points
  • Using the v12.1 feature of a PL/SQL function embedded within the query is almost always next best, although slower by up to about a third; its being slower than a database function may surprise some
  • Times generally increased uniformly with numbers of tokens, usually either linearly or quadratically
  • Times did not seem to increase so uniformly with token size, except for XML (XML_QRY), Match_Recognize (RMR_QRY) and regular expression (RGX_QRY)
  • For larger numbers of tokens, three methods all showed quadratic variation and were very inefficient: Model (MOD_QRY), regular expression (RGX_QRY), and recursive subquery factors (RSF_QRY)
  • We have highlighted two inefficient but widespread approaches to row-generation by Connect By SQL, and pointed out a better method

These conclusions are based on the string-splitting problem considered, but no doubt would apply to other scenarios involving requirements to split rows into multiple rows based on some form of string-parsing.

Database VersionOracle Database 12c 12.1.0.2.0
OutputBatch_Str
GitHubA Framework for Dimensional Benchmarking of SQL Query Performance
Overview ArticleA Framework for Dimensional Benchmarking of SQL Performance






Dimensional Benchmarking of General SQL Bursting Problems

I recently posted an article on Dimensional Benchmarking of Oracle v10-v12 Queries for SQL Bursting Problems. This article added an Oracle v12 SQL solution, involving Match_Recognize to benchmark against some v10 and v11 solutions that I had posted on Scribd a few years ago. A few days before posting it I noticed an OTN thread with a problem that struck me as being of a similar type, Amalgamating groups to be beyond a given size threshold. Where in my original 'bursting' problem a group is defined by a maximum interval from its starting date, in the OTN problem a group is defined by the cumulative sum of a numeric attribute from the group starting record.

I added a comment on the thread at the time mentioning the results that I had got on the original problem, and adding a model solution for the problem raised on the new thread. I have now taken this second 'bursting'-type problem and have benchmarked both the main two solutions proposed on that thread (by other posters), as well as two versions of my own model solution, and a variant of the recursive subquery factor solution that uses a temporary table to achieve much faster performance.

Also, I noticed a question just yesterday on AskTom that is posing essentially the same problem as in my earlier article (which itself came from AskTom several years ago 🙂 ), Complex sql.

The results show that Match_Recognize, as before, is by far the most efficient solution. They also show that the faster solutions vary linearly with dataset size (within a given partition), while the slow ones vary quadratically. One interesting finding is that the solution by the Model clause can be changed from very slow, and quadratically varying, to linearly varying, and second in performance only to Match_Recognize, by using a rule ordering clause (which avoids the need for automatic rules ordering).

I obtained these results on my Windows 10 home computer with Oracle 12.1, and used my own benchmarking framework, available on GitHub, A Framework for Dimensional Benchmarking of SQL Query Performance.

Generalised 'Bursting' Problem Definition

The problem is to determine break groups using a running aggregate based on some function of the record attributes, with a defined ordering, starting from the group starting record, and with a group's end record defined by the aggregate reaching (or exceeding) some limit. One may consider the first record reaching (or exceeding) the limit to define the first record in the next group, as in the original bursting problem, or to be the last record in the current group, as in the OTN example.

The data are partitioned by some key in general.

OTN-like Item Weights 'Bursting' Problem

The data structure used in this article is based on that of the original poster in the OTN thread, but with more generic table and column names.

ITEMS Table

CREATE TABLE items (
    id          NUMBER NOT NULL, 
    cat         VARCHAR2(30) NOT NULL, 
    seq         NUMBER NOT NULL, 
    weight      NUMBER NOT NULL,
    CONSTRAINT itm_pk PRIMARY KEY (id)
)
/
CREATE INDEX items_N1 ON items (cat, seq)
/
DROP  SEQUENCE itm_s
/
CREATE SEQUENCE itm_s
/

Functional Test Data

I created test data with a test weight limit of 10, as follows, with groups shown at detailed level. The first two categories are taken from the OTN problem, while I added a third category to test the case where the limit is not reached.

 ID CAT                                   SEQ     WEIGHT SUB_WEIGHT  FINAL_GRP
--- ------------------------------ ---------- ---------- ---------- ----------
  1 Rural                                  10          2          2          4
  2                                         9          3          5          4
  3                                         8          1          6          4
  4                                         7          4         10          4
  5                                         6         11         11          5
  6                                         5          2          2          9
  7                                         4          2          4          9
  8                                         3          4          8          9
  9                                         2         30         38          9
 10                                         1         12         12         10

 11 Urban                                  10          1          1         12
 12                                         9         12         13         12
 13                                         8          2          2         15
 14                                         7          5          7         15
 15                                         6          7         14         15
 16                                         5         15         15         16
 17                                         4         25         25         17
 18                                         3          2          2         20
 19                                         2          1          3         20
 20                                         1          8         11         20

 21 Suburban                               10          2          2         22
 22                                         9          1          3         22

22 rows selected.

The queries shown later give the groups at summary level, as follows:

CAT                              # Groups
------------------------------ ----------
Rural                                   4
Suburban                                1
Urban                                   5

A Note on Functional Testing and 'Scenario Coverage'

In the Match_Recognize query proposed in the OTN thread the pattern is defined in terms of two categories, say s and t, where:

  • s denotes a record where the running sum < the limit
  • t denotes a record where the running sum >= the limit

The pattern to match can be written as (s* t?) meaning zero or more category s records, followed by zero or one category t records. This immediately suggests that any given match falls into one of the following scenarios for frequencies of (s, t):

  1. (0, 0) - this looks like an empty set of records, but could be non-empty if null values were allowed for the weight
  2. (1+, 0) - the case where the limit is not reached, which must be the last match if there are no null weights
  3. (0, 1) - where the first record in a group reaches the limit by itself
  4. (1+, 1) - where one or more records in a group are below the limit, followed by a record that reaches the limit

In the results above, we see that group 22 matches scenario 2, while groups 10, 16 and 17 match scenario 3, and the remainder match scenario 4. We take the weight to be not null so scenario 1 is not possible. This kind of 'scenario coverage' is much more important than the 'code coverage' that is often focussed on in testing, especially by object oriented programmers.

In the following sections for individual queries, the query (and other SQL) is listed first, followed by the execution plan for the largest problem (W40-D8000).

Model Query 1 - Automatic Order (MOD_QRY)

WITH all_rows AS (  
SELECT  id,
        cat, 
        seq, 
        weight,
        sub_weight,
        final_grp
  FROM items
 MODEL
    PARTITION BY (cat)
    DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn)
    MEASURES (id, weight, weight sub_weight, id final_grp, seq)
    RULES AUTOMATIC ORDER (
       sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END,
       final_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()])
    )
)
SELECT  cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows
  FROM all_rows
GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:21:10.69 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:21:10.69 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|55:38:12.41 |    1074 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |    320K|    320K|55:38:12.36 |    1074 |    38M|  4773K|   32M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.19 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------

Notes on Model Query 1 - Automatic Order (MOD_QRY)

The default rules order for Model is sequential, but if we specify sequential, or accept the default, in the query above, then we get the error:

ORA-32637: Self cyclic rule in sequential order Model

Rule Dependency in AUTOMATIC ORDER Models

In some cases, Oracle Database may not be able to ascertain that your model is acyclic even though there is no cyclical dependency among the rules. This can happen if you have complex expressions in your cell references. Oracle Database assumes that the rules are cyclic and employs a CYCLIC algorithm that evaluates the model iteratively based on the rules and data. Iteration stops as soon as convergence is reached and the results are returned. Convergence is defined as the state in which further executions of the model will not change values of any of the cell in the model. Convergence is certain to be reached when there are no cyclical dependencies.

When we specify automatic order, the solution is obtained without error using Oracle's cyclic algorithm (operation SQL MODEL CYCLIC). Unfortunately, in this case there is a large performance impact, and we will see in the results section that execution time varies as the square of the number of records within a partition, i.e. quadratically.

Model Query 2 - Sequential Order (MOD_QRY_D)

WITH all_rows AS (  
SELECT  id,
        cat, 
        seq, 
        weight,
        sub_weight,
        final_grp
  FROM items
 MODEL
    PARTITION BY (cat)
    DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn)
    MEASURES (id, weight, weight sub_weight, id final_grp, seq)
    RULES (
       sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END,
       final_grp[ANY] ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()])
    )
)
SELECT 
        cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows
  FROM all_rows
GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:00:02.43 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:00:02.43 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|00:01:32.47 |    1074 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |    320K|    320K|00:01:32.42 |    1074 |    36M|  4844K|   29M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.18 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------

Notes on Model Query 2 - Sequential Order (MOD_QRY_D)

In the query above, the rules order clause is omitted, thus defaulting to sequential, while avoiding the ORA-32637 error. This is achieved by specifying ORDER BY rn DESC on the left side of the second rule. The solution, via operation SQL MODEL ORDERED is much faster, and we will see in the results section that execution time now varies linearly with the number of records within a partition.

Match Recognize Query (MTH_QRY)

SELECT
        cat         cat,
        final_grp   final_grp,
        num_rows    num_rows
  FROM items
 MATCH_RECOGNIZE (
   PARTITION BY cat
   ORDER BY seq DESC
   MEASURES FINAL LAST (id) final_grp,
            COUNT(*) num_rows
   ONE ROW PER MATCH
   PATTERN (s* t?)
   DEFINE s AS Sum (weight) < 5000,
          t AS Sum (weight) >= 5000
 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |   3229 |00:00:00.17 |    1074 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                 |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |    320K|   3229 |00:00:00.17 |    1074 |    15M|  1460K|   13M (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
---------------------------------------------------------------------------------------------------------------------

Notes on Match Recognize Query (MTH_QRY)

The query above is essentially the same as one of the posters proposed on the OTN thread, with a slight tweak to the pattern that does not alter its meaning, and also changing it to return one row per match. The query performs much more efficiently than any of the other queries, using the Match_Recognize clause introduced in Oracle 12.1 SQL for Pattern Matching.

Recursive Subquery Factors Query 1 - Direct (RSF_QRY)

WITH itm AS (
SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn
  FROM items
), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS (
SELECT id, cat, rn, seq, weight, weight, 1
  FROM itm
 WHERE rn = 1
 UNION ALL
SELECT  itm.id,
        itm.cat,
        itm.rn,
        itm.seq,
        itm.weight,
        itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END,    
        rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END
  FROM rsq
  JOIN itm
    ON itm.rn        = rsq.rn + 1
   AND itm.cat       = rsq.cat
), final_grouping AS (
SELECT  cat             cat,
        First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
FROM rsq
)
SELECT  cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows
FROM final_grouping
GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |   3229 |00:08:50.80 |    9365K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     81 |   3229 |00:08:50.80 |    9365K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |       |      1 |     81 |    320K|00:08:50.80 |    9365K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     81 |    320K|00:08:50.75 |    9365K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |       |      1 |     81 |    320K|01:13:10.25 |    9365K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |    320K|01:13:10.14 |    9365K|  4096 |  4096 |   20M (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     40 |00:00:00.34 |    1074 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |    320K|     40 |00:00:00.34 |    1074 |    23M|  1772K|   20M (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |    320K|    320K|00:00:00.04 |    1074 |       |       |          |
|*  9 |       HASH JOIN                              |       |   8000 |     80 |    319K|00:25:04.02 |    8592K|  1214K|  1214K| 1283K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   8000 |        |    320K|00:00:00.19 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   8000 |    320K|   2560M|00:30:26.18 |    8592K|       |       |          |
|  12 |         WINDOW SORT                          |       |   8000 |    320K|   2560M|00:24:31.69 |    8592K|    15M|  1460K|   13M (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   8000 |    320K|   2560M|00:04:01.43 |    8592K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Notes on Recursive Subquery Factors Query 1 - Direct (RSF_QRY)

This is based on the second of the recursive subquery factor queries in the OTN thread, and we can see the performance issue in the plan above. The recursive branch of the UNION ALL executes once for each record within a partition and performs a full scan on the items table each time. This results in execution time varying as the square of the number of records within a partition, as can be seen in the results section later. The performance can be much improved by using a temporary table, as in the next query.

Recursive Subquery Factors Query 2 - With Temporary Table (RSF_TMP)

Temporary Table Definition

CREATE GLOBAL TEMPORARY TABLE items_tmp (
    id          NUMBER, 
    cat         VARCHAR2(30), 
    seq         NUMBER, 
    weight      NUMBER,
    itm_rownum  NUMBER
)
ON COMMIT DELETE ROWS
/
CREATE INDEX items_tmp_N1 ON items_tmp (itm_rownum, cat)
/

SQL - Insert to temporary table

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items

Query using temporary table

WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS (
SELECT id, cat, itm_rownum, seq, weight, weight, 1
  FROM items_tmp
 WHERE itm_rownum = 1
 UNION ALL
SELECT  /*+ INDEX (itm items_tmp_n1) */ itm.id, 
        itm.cat,
        itm.itm_rownum,
        itm.seq,
        itm.weight,
        itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END,    
        rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END
  FROM rsq
  JOIN items_tmp itm
    ON itm.itm_rownum   = rsq.rn + 1
   AND itm.cat          = rsq.cat
), final_grouping AS (
SELECT  cat             cat,
        First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
FROM rsq
)
SELECT  cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows
FROM final_grouping
GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |   3229 |00:00:02.69 |    1118K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     91 |   3229 |00:00:02.69 |    1118K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |              |      1 |     91 |    320K|00:00:02.69 |    1118K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     91 |    320K|00:00:02.63 |    1118K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |              |      1 |     91 |    320K|00:00:02.73 |    1118K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |    320K|00:00:02.65 |    1118K|  4096 |  4096 |   20M (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     40 |     40 |00:00:00.01 |      43 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     40 |     40 |00:00:00.01 |       3 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   8000 |     51 |    319K|00:00:01.15 |     346K|       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   8000 |        |    320K|00:00:00.07 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |    320K|      1 |    319K|00:00:00.78 |     346K|       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |    320K|   3191 |    319K|00:00:00.31 |   26059 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan

Notes on Recursive Subquery Factors Query 2 - With Temporary Table (RSF_TMP)

In this solution, the initial subquery from the previous query is written to a temporary table that is indexed on the join column. This means that the join in the recursive branch of the UNION ALL is indexed and much quicker, resulting in linear variation in execution time with the number of records in a partition.

Notice that it was necessary to hint the index usage. It is possible to achieve the indexed join without a hint by including a call to gather statistics in the pre-query SQL. Unfortunately, Oracle's DBMS_Stats procedure performs a commit - which clears the data from the temporary table. Although we could get around the clearing of the table by making it a normal table and manually truncating it, it is probably better to accept this as a valid use-case for a hint - after all, the whole purpose of the temporary table is to permit index use.

Performance Testing Results

The 'width' parameter is taken to be the number of cat values partitioning the dataset, while the 'depth' parameter is taken to be the number of records within each category. The weight is assigned a random integer between 1 and 100, and the weight limit is 5,000.

Record Counts Table

Input Record Counts
Depth W10 W20 W40
D1000 10,000 20,000 40,000
D2000 20,000 40,000 80,000
D4000 40,000 80,000 160,000
D8000 80,000 160,000 320,000
Output Record Counts
Depth W10 W20 W40
D1000 105 209 422
D2000 205 411 829
D4000 406 815 1,625
D8000 808 1,618 3,229

Elapsed Times Table (elapsed seconds)

MOD_QRY Elapsed Seconds Depth Ratios to Prior Width Ratios to Prior
Depth W10 W20 W40 W10 W20 W40 W20 W40
D1000 16 47 99 2.9 2.1
D2000 62 190 397 3.9 4.0 4.0 3.1 2.1
D4000 243 762 1,390 3.9 4.0 3.5 3.1 1.8
D8000 962 2,082 5,566 4.0 2.7 4.0 2.2 2.7
Average 3.9 3.6 3.8 2.8 2.2
MOD_QRY_D Elapsed Seconds Depth Ratios to Prior Width Ratios to Prior
Depth W10 W20 W40 W10 W20 W40 W20 W40
D1000 0.08 0.16 0.31 2.0 1.9
D2000 0.16 0.30 0.61 2.0 1.9 2.0 1.9 2.0
D4000 0.30 0.59 1.19 1.9 2.0 2.0 2.0 2.0
D8000 0.59 1.20 2.42 2.0 2.0 2.0 2.0 2.0
Average 1.9 2.0 2.0 2.0 2.0
MTH_QRY Elapsed Seconds Depth Ratios to Prior Width Ratios to Prior
Depth W10 W20 W40 W10 W20 W40 W20 W40
D1000 0 0.016 0.016 #DIV/0! 1.0
D2000 0.016 0.016 0.047 #DIV/0! 1.0 2.9 1.0 2.9
D4000 0.016 0.031 0.078 1.0 1.9 1.7 1.9 2.5
D8000 0.047 0.094 0.172 2.9 3.0 2.2 2.0 1.8
Average 2.0 2.0 2.3 1.6 2.1
RSF_QRY Elapsed Seconds Depth Ratios to Prior Width Ratios to Prior
Depth W10 W20 W40 W10 W20 W40 W20 W40
D1000 6 12 24 2.0 2.0
D2000 23 46 94 3.8 3.8 3.9 2.0 2.0
D4000 92 185 377 4.0 4.0 4.0 2.0 2.0
D8000 369 750 1,513 4.0 4.1 4.0 2.0 2.0
Average 3.9 4.0 4.0 2.0 2.0
RSF_TMP Elapsed Seconds Depth Ratios to Prior Width Ratios to Prior
Depth W10 W20 W40 W10 W20 W40 W20 W40
D1000 0.09 0.19 0.36 2.1 1.9
D2000 0.19 0.38 0.73 2.1 2.0 2.0 2.0 1.9
D4000 0.39 0.77 1.53 2.1 2.0 2.1 2.0 2.0
D8000 0.77 1.55 3.49 2.0 2.0 2.3 2.0 2.3
Average 2.0 2.0 2.1 2.0 2.0

Slice Graphs

wide

deep

Performance Discussion

Variation with Width

The width parameter represents the number of categories here, and category (CAT) is the query partitioning key. We might therefore expect that the execution time would be proportional to the width when the depth parameter is fixed. The width values used were 10, 20 and 40, so we would expect times to double between W10 and W20, and again between W20 and W40.

In fact, we see from the width ratios columns in the tables that this expectation is very closely matched in the cases of MOD_QRY_D, RSF_QRY, AND RSF_TMP.

For MOD_QRY, the ratios are quite variable, and mostly above 2, so that the CYCLIC Model algorithm does not meet our expectation.

For MTH_QRY (Match_Recogize), the elapsed times are very small, 0.17 for the largest problem (14 times faster than the next best, MOD_QRY_D), and that likely explains the variance.

Variation with Depth

The depth parameter represents the number of of records for each category. The depth ratios show that two of the queries show very close to quadratic variation of time with depth, while three show very close to linear variation, and the linear queries are unsurprisingly much faster.

MOD_QRY and RSF_QRY vary quadratically with depth (number of records per partition key).

MOD_QRY_D, MTH_QRY, AND RSF_TMP vary linearly with depth (number of records per partition key).

Conclusions

  • As in the earlier article, the new v12.1 feature Match_Recogize proved to be much faster than the other techniques for this problem
  • The solution using Model clause with the operation SQL MODEL CYCLIC showed quadratic variation in execution times with size, but a very simple change to allow SQL MODEL ORDERED operation produced linear variation, and was second only to Match_Recogize in performance
  • Recursive subquery factoring had timings that increased quadratically with number of records; this was due to a combination of the number of starts of a subquery, and full scans within it
  • This kind of unscaleable quadratic resource usage can often be avoided by the use of a temporary table with appropriate indexes, as demonstrated here. There is another example of its use for performance improvement here, SQL for Shortest Path Problems 2: A Branch and Bound Approach
  • It's hard to see how you could detect some of the performance characteristics found here without benchmarking across varying problem sizes

Full Output Log

SQL> 
SQL> COLUMN "Database"	FORMAT A20
SQL> COLUMN "Time"		FORMAT A20
SQL> COLUMN "Version"	FORMAT A30
SQL> COLUMN "Session"	FORMAT 9999990
SQL> COLUMN "OS User"	FORMAT A10
SQL> COLUMN "Machine"	FORMAT A20
SQL> SET LINES 180
SQL> SET PAGES 1000
SQL> 
SQL> SELECT 'Start: ' || dbs.name "Database", To_Char (SYSDATE,'DD-MON-YYYY HH24:MI:SS') "Time",
  2  	Replace (Substr(ver.banner, 1, Instr(ver.banner, '64')-4), 'Enterprise Edition Release ', '') "Version"
  3    FROM v$database dbs,  v$version ver
  4   WHERE ver.banner LIKE 'Oracle%';

Database             Time                 Version
-------------------- -------------------- ------------------------------
Start: ORCL          22-NOV-2016 20:46:15 Oracle Database 12c 12.1.0.2.0

SQL> 
SQL> DEFINE RUNDESC='Itm-One'
SQL> 
SQL> SET SERVEROUTPUT ON
SQL> SET TIMING ON
SQL> 
SQL> ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY';

Session altered.

Elapsed: 00:00:00.00
SQL> BEGIN
  2  
  3    Utils.Clear_Log;
  4    Bench_Queries.Create_Run (
  5  			p_run_desc		=> '&RUNDESC',
  6  			p_points_wide_list	=> L1_num_arr (10, 20, 40),
  7  			p_points_deep_list	=> L1_num_arr (1000, 2000, 4000, 8000),
  8  /*
  9              p_points_wide_list	=> L1_num_arr (10),
 10  			p_points_deep_list	=> L1_num_arr (500, 1000, 2000),
 11  */
 12  			p_query_group		=> 'WEIGHTS',
 13              p_redo_data_yn      => 'Y');
 14    Bench_Queries.Execute_Run;
 15  
 16  END;
 17  /
old   5: 			p_run_desc		=> '&RUNDESC',
new   5: 			p_run_desc		=> 'Itm-One',

PL/SQL procedure successfully completed.

Elapsed: 04:17:04.13
SQL> PROMPT Default log
Default log
SQL> @../sql/L_Log_Default

TEXT
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Bench run 41 created

Elapsed: 00:00:00.00
SQL> PROMPT Execute_Run log
Execute_Run log
SQL> @../sql/L_Log_Gp

TEXT
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Bench run id = 41

Wide Points
===========
10, 20, 40

Deep Points
===========
1000, 2000, 4000, 8000
Header="cat","final_grp","num_rows","Random"
mid=
        cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows

new='"' ||  cat             || '","' || final_grp       || '","' ||
        COUNT(*) || '","#?"'

/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","#?"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

Header="cat","final_grp","num_rows","Random"
mid=
        cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows

new='"' ||  cat             || '","' || final_grp       || '","' ||
        COUNT(*) || '","#?"'

/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","#?"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

Header="cat","final_grp","num_rows","Random"
mid=
        cat         cat,
        final_grp   final_grp,
        num_rows    num_rows

new='"' ||  cat         || '","' || final_grp   || '","' ||
        num_rows || '","#?"'

/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","#?"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LAST
 (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

Header="cat","final_grp","num_rows","Random"
mid=
        cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows

new='"' ||  cat             || '","' || final_grp       || '","' ||
        COUNT(*) || '","#?"'

/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","#?"' FROM final_grouping GROUP BY cat, final_grp ORDER BY ca
t, final_grp

Header="cat","final_grp","num_rows","Random"
mid=
        cat             cat,
        final_grp       final_grp,
        COUNT(*)        num_rows

new='"' ||  cat             || '","' || final_grp       || '","' ||
        COUNT(*) || '","#?"'

/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","#?"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Items truncated
10000 (1000) records (per category) added, average group size (from) = 116.3 (1000), # of groups = 8.6

Timer Set: Setup, Constructed at 22 Nov 2016 20:46:15, written at 20:46:16
==========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   0.70        0.56             1        0.70300        0.56000
Gather_Table_Stats        0.08        0.08             1        0.07800        0.08000
GRP_CNT                   0.02        0.02             1        0.01600        0.02000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     0.80        0.66             4        0.19925        0.16500
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","9324"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  3f1awu08xfyms, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","9324"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    105 |00:00:16.01 |      38 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  10000 |    105 |00:00:16.01 |      38 |  9216 |  9216 | 8192  (0)|
|   2 |   VIEW                |       |      1 |  10000 |  10000 |00:00:07.47 |      38 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  10000 |  10000 |00:00:07.47 |      38 |  1869K|  1197K| 1695K (0)|
|   4 |     WINDOW SORT       |       |      1 |  10000 |  10000 |00:00:00.01 |      38 |   619K|   472K|  550K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  10000 |  10000 |00:00:00.01 |      38 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:46:16, written at 20:46:32
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             16.00       16.00             1       16.00200       16.00000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.27        0.27             1        0.26500        0.27000
(Other)                  0.03        0.03             1        0.03100        0.03000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   16.30       16.30             8        2.03725        2.03750
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:46:16, written at 20:46:32
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       16.31       16.31             1       16.31400       16.31000
-------  ----------  ----------  ------------  -------------  -------------
Total         16.31       16.31             2        8.15700        8.15500
-------  ----------  ----------  ------------  -------------  -------------
106 rows written to MOD_QRY.csv
Summary for W/D = 10/1000 , bench_run_statistics_id = 404

Timer Set: Run_One, Constructed at 22 Nov 2016 20:46:16, written at 20:46:32
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           16.33       16.33             1       16.33000       16.33000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         16.33       16.33             2        8.16500        8.16500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","1112"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  8h4usyvxw24zv, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","1112"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    105 |00:00:00.07 |      38 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  10000 |    105 |00:00:00.07 |      38 |  9216 |  9216 | 8192  (0)|
|   2 |   VIEW                |       |      1 |  10000 |  10000 |00:00:00.03 |      38 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  10000 |  10000 |00:00:00.03 |      38 |  1822K|  1215K| 1339K (0)|
|   4 |     WINDOW SORT       |       |      1 |  10000 |  10000 |00:00:00.01 |      38 |   619K|   472K|  550K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  10000 |  10000 |00:00:00.01 |      38 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:46:32, written at 20:46:33
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.08        0.08             1        0.07800        0.08000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.24        0.23             1        0.23500        0.23000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.33        0.32             8        0.04100        0.04000
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:46:32, written at 20:46:33
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.33        0.32             1        0.32800        0.32000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.33        0.32             2        0.16400        0.16000
-------  ----------  ----------  ------------  -------------  -------------
106 rows written to MOD_QRY_D.csv
Summary for W/D = 10/1000 , bench_run_statistics_id = 405

Timer Set: Run_One, Constructed at 22 Nov 2016 20:46:32, written at 20:46:33
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.34        0.34             1        0.34300        0.34000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.34        0.34             2        0.17150        0.17000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","8765"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  c6gfsqmux9bs5, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","8765"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    105 |00:00:00.01 |      38 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  10000 |    105 |00:00:00.01 |      38 | 13312 | 13312 |12288  (0)|
|   2 |   VIEW                 |       |      1 |  10000 |    105 |00:00:00.01 |      38 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  10000 |    105 |00:00:00.01 |      38 |   619K|   472K|  550K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  10000 |  10000 |00:00:00.01 |      38 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:46:33, written at 20:46:33
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.00        0.00             1        0.00000        0.00000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.23             1        0.23400        0.23000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.25        0.25             8        0.03125        0.03125
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:46:33, written at 20:46:33
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.27        0.27             1        0.26600        0.27000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.27        0.27             2        0.13300        0.13500
-------  ----------  ----------  ------------  -------------  -------------
106 rows written to MTH_QRY.csv
Summary for W/D = 10/1000 , bench_run_statistics_id = 406

Timer Set: Run_One, Constructed at 22 Nov 2016 20:46:33, written at 20:46:33
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.27        0.27             1        0.26600        0.27000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.27        0.27             2        0.13300        0.13500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","6581"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  dd67jjzfxbpr9, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","6581"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    105 |00:00:05.88 |   45370 |       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     11 |    105 |00:00:05.88 |   45370 |  9216 |  9216 | 8192  (0)|
|   2 |   VIEW                                       |       |      1 |     11 |  10000 |00:00:05.88 |   45370 |       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     11 |  10000 |00:00:05.88 |   45370 |   549K|   457K|  487K (0)|
|   4 |     VIEW                                     |       |      1 |     11 |  10000 |00:00:07.19 |   45370 |       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  10000 |00:00:07.19 |   45370 |  2048 |  2048 |  676K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     10 |00:00:00.01 |      38 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  10000 |     10 |00:00:00.01 |      38 |   761K|   499K|  676K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  10000 |  10000 |00:00:00.01 |      38 |       |       |          |
|*  9 |       HASH JOIN                              |       |   1000 |     10 |   9990 |00:00:05.62 |   38000 |  1214K|  1214K|  892K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   1000 |        |  10000 |00:00:00.01 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   1000 |  10000 |     10M|00:00:06.75 |   38000 |       |       |          |
|  12 |         WINDOW SORT                          |       |   1000 |  10000 |     10M|00:00:05.34 |   38000 |   619K|   472K|  550K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   1000 |  10000 |     10M|00:00:00.95 |   38000 |       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 20:46:33, written at 20:46:39
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.02        0.02             1        0.01500        0.02000
First fetch              5.88        5.87             1        5.87600        5.87000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    6.13        6.13             8        0.76563        0.76625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:46:33, written at 20:46:39
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        6.14        6.13             1        6.14100        6.13000
-------  ----------  ----------  ------------  -------------  -------------
Total          6.14        6.13             2        3.07050        3.06500
-------  ----------  ----------  ------------  -------------  -------------
106 rows written to RSF_QRY.csv
Summary for W/D = 10/1000 , bench_run_statistics_id = 407

Timer Set: Run_One, Constructed at 22 Nov 2016 20:46:33, written at 20:46:39
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            6.14        6.13             1        6.14100        6.13000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          6.14        6.13             2        3.07050        3.06500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","7865"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  06r0kbvv7kxxx, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","7865"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    105 |00:00:00.07 |   18689 |       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     20 |    105 |00:00:00.07 |   18689 |  9216 |  9216 | 8192  (0)|
|   2 |   VIEW                                       |              |      1 |     20 |  10000 |00:00:00.07 |   18689 |       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     20 |  10000 |00:00:00.07 |   18689 |   549K|   457K|  487K (0)|
|   4 |     VIEW                                     |              |      1 |     20 |  10000 |00:00:00.06 |   18689 |       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  10000 |00:00:00.06 |   18689 |  2048 |  2048 |  676K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     10 |     10 |00:00:00.01 |      12 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     10 |     10 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   1000 |     10 |   9990 |00:00:00.03 |   11345 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   1000 |        |  10000 |00:00:00.01 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  10000 |      1 |   9990 |00:00:00.02 |   11345 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  10000 |    100 |   9990 |00:00:00.01 |    1355 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 20:46:39, written at 20:46:40
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.02        0.02             1        0.01600        0.02000
Open cursor              0.02        0.01             1        0.01600        0.01000
First fetch              0.06        0.07             1        0.06200        0.07000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.27        0.26             1        0.26600        0.26000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.38        0.37             8        0.04688        0.04625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:46:39, written at 20:46:40
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.38        0.37             1        0.37500        0.37000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.38        0.37             2        0.18750        0.18500
-------  ----------  ----------  ------------  -------------  -------------
106 rows written to RSF_TMP.csv
Summary for W/D = 10/1000 , bench_run_statistics_id = 408

Timer Set: Run_One, Constructed at 22 Nov 2016 20:46:39, written at 20:46:40
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.39        0.39             1        0.39000        0.39000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.39        0.39             2        0.19500        0.19500
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
20000 (2000) records (per category) added, average group size (from) = 111.7 (2000), # of groups = 17.9

Timer Set: Setup, Constructed at 22 Nov 2016 20:46:40, written at 20:46:41
==========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   1.17        1.06             1        1.17200        1.06000
Gather_Table_Stats        0.06        0.06             1        0.06300        0.06000
GRP_CNT                   0.00        0.00             1        0.00000        0.00000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     1.24        1.12             4        0.30875        0.28000
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","5462"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  34cyh2gw9bkva, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","5462"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    205 |00:01:01.50 |      68 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  20000 |    205 |00:01:01.50 |      68 | 15360 | 15360 |14336  (0)|
|   2 |   VIEW                |       |      1 |  20000 |  20000 |00:01:38.36 |      68 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  20000 |  20000 |00:01:38.35 |      68 |  2990K|  1197K| 3174K (0)|
|   4 |     WINDOW SORT       |       |      1 |  20000 |  20000 |00:00:00.01 |      68 |  1045K|   546K|  928K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:46:41, written at 20:47:43
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             61.51       61.50             1       61.50600       61.50000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.24        0.24             1        0.23500        0.24000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   61.76       61.75             8        7.71963        7.71875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:46:41, written at 20:47:43
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       61.77       61.76             1       61.77200       61.76000
-------  ----------  ----------  ------------  -------------  -------------
Total         61.77       61.76             2       30.88600       30.88000
-------  ----------  ----------  ------------  -------------  -------------
206 rows written to MOD_QRY.csv
Summary for W/D = 10/2000 , bench_run_statistics_id = 409

Timer Set: Run_One, Constructed at 22 Nov 2016 20:46:41, written at 20:47:43
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           61.77       61.76             1       61.77200       61.76000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         61.77       61.76             2       30.88600       30.88000
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","4455"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  5bps7t3zrrtpp, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","4455"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    205 |00:00:00.15 |      68 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  20000 |    205 |00:00:00.15 |      68 | 15360 | 15360 |14336  (0)|
|   2 |   VIEW                |       |      1 |  20000 |  20000 |00:00:01.68 |      68 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  20000 |  20000 |00:00:01.68 |      68 |  2883K|  1215K| 2462K (0)|
|   4 |     WINDOW SORT       |       |      1 |  20000 |  20000 |00:00:00.01 |      68 |  1045K|   546K|  928K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:47:43, written at 20:47:43
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.02        0.01             1        0.01600        0.01000
First fetch              0.14        0.15             1        0.14000        0.15000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.24        0.23             1        0.23500        0.23000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.39        0.39             8        0.04888        0.04875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:47:43, written at 20:47:43
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.41        0.39             1        0.40600        0.39000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.41        0.39             2        0.20300        0.19500
-------  ----------  ----------  ------------  -------------  -------------
206 rows written to MOD_QRY_D.csv
Summary for W/D = 10/2000 , bench_run_statistics_id = 410

Timer Set: Run_One, Constructed at 22 Nov 2016 20:47:43, written at 20:47:43
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.41        0.39             1        0.40600        0.39000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.41        0.39             2        0.20300        0.19500
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","1173"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  93r2k5tp0npsh, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","1173"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    205 |00:00:00.01 |      68 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  20000 |    205 |00:00:00.01 |      68 | 22528 | 22528 |20480  (0)|
|   2 |   VIEW                 |       |      1 |  20000 |    205 |00:00:00.01 |      68 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  20000 |    205 |00:00:00.01 |      68 |  1045K|   546K|  928K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:47:43, written at 20:47:43
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.02        0.01             1        0.01600        0.01000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.25        0.25             8        0.03125        0.03125
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:47:43, written at 20:47:43
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.25        0.25             1        0.25000        0.25000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.25        0.25             2        0.12500        0.12500
-------  ----------  ----------  ------------  -------------  -------------
206 rows written to MTH_QRY.csv
Summary for W/D = 10/2000 , bench_run_statistics_id = 411

Timer Set: Run_One, Constructed at 22 Nov 2016 20:47:43, written at 20:47:43
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.27        0.26             1        0.26600        0.26000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.27        0.26             2        0.13300        0.13000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","9417"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  6g93u1jpujr2h, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","9417"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    205 |00:00:23.15 |     159K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     21 |    205 |00:00:23.15 |     159K| 15360 | 15360 |14336  (0)|
|   2 |   VIEW                                       |       |      1 |     21 |  20000 |00:00:23.15 |     159K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     21 |  20000 |00:00:23.15 |     159K|   974K|   535K|  865K (0)|
|   4 |     VIEW                                     |       |      1 |     21 |  20000 |00:00:28.88 |     159K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  20000 |00:00:28.88 |     159K|  2048 |  2048 | 1369K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     10 |00:00:00.02 |      68 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  20000 |     10 |00:00:00.02 |      68 |  1541K|   615K| 1369K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
|*  9 |       HASH JOIN                              |       |   2000 |     20 |  19990 |00:00:22.15 |     136K|  1214K|  1214K|  870K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   2000 |        |  20000 |00:00:00.01 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   2000 |  20000 |     40M|00:00:26.76 |     136K|       |       |          |
|  12 |         WINDOW SORT                          |       |   2000 |  20000 |     40M|00:00:21.22 |     136K|  1045K|   546K|  928K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   2000 |  20000 |     40M|00:00:03.56 |     136K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 20:47:43, written at 20:48:07
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             23.16       23.15             1       23.15900       23.15000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   23.41       23.41             8        2.92600        2.92625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:47:43, written at 20:48:07
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       23.42       23.42             1       23.42400       23.42000
-------  ----------  ----------  ------------  -------------  -------------
Total         23.42       23.42             2       11.71200       11.71000
-------  ----------  ----------  ------------  -------------  -------------
206 rows written to RSF_QRY.csv
Summary for W/D = 10/2000 , bench_run_statistics_id = 412

Timer Set: Run_One, Constructed at 22 Nov 2016 20:47:43, written at 20:48:07
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           23.42       23.42             1       23.42400       23.42000
(Other)        0.02        0.02             1        0.01600        0.02000
-------  ----------  ----------  ------------  -------------  -------------
Total         23.44       23.44             2       11.72000       11.72000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","680"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  c28d82nb1rwpg, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","680"' FROM final_grouping GROUP BY cat, final_grp ORDER
BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    205 |00:00:00.14 |   46582 |       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     20 |    205 |00:00:00.14 |   46582 | 15360 | 15360 |14336  (0)|
|   2 |   VIEW                                       |              |      1 |     20 |  20000 |00:00:00.14 |   46582 |       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     20 |  20000 |00:00:00.14 |   46582 |   974K|   535K|  865K (0)|
|   4 |     VIEW                                     |              |      1 |     20 |  20000 |00:00:00.13 |   46582 |       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  20000 |00:00:00.13 |   46582 |  2048 |  2048 | 1369K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     10 |     10 |00:00:00.01 |      12 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     10 |     10 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   2000 |     10 |  19990 |00:00:00.06 |   22725 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   2000 |        |  20000 |00:00:00.01 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  20000 |      1 |  19990 |00:00:00.05 |   22725 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  20000 |    197 |  19990 |00:00:00.02 |    2735 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 20:48:07, written at 20:48:07
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.03        0.04             1        0.03200        0.04000
Open cursor              0.02        0.01             1        0.01500        0.01000
First fetch              0.14        0.14             1        0.14100        0.14000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.45        0.45             8        0.05663        0.05625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:48:07, written at 20:48:07
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.47        0.47             1        0.46900        0.47000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.47        0.47             2        0.23450        0.23500
-------  ----------  ----------  ------------  -------------  -------------
206 rows written to RSF_TMP.csv
Summary for W/D = 10/2000 , bench_run_statistics_id = 413

Timer Set: Run_One, Constructed at 22 Nov 2016 20:48:07, written at 20:48:07
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.47        0.47             1        0.46900        0.47000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.47        0.47             2        0.23450        0.23500
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
40000 (4000) records (per category) added, average group size (from) = 107.8 (4000), # of groups = 37.1

Timer Set: Setup, Constructed at 22 Nov 2016 20:48:07, written at 20:48:10
==========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   2.30        2.11             1        2.29700        2.11000
Gather_Table_Stats        0.16        0.10             1        0.15700        0.10000
GRP_CNT                   0.02        0.01             1        0.01500        0.01000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     2.47        2.22             4        0.61725        0.55500
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","7000"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  6jjb8ybnuwrq4, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","7000"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    406 |00:04:03.06 |     175 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  40000 |    406 |00:04:03.06 |     175 | 31744 | 31744 |28672  (0)|
|   2 |   VIEW                |       |      1 |  40000 |  40000 |00:06:37.77 |     175 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  40000 |  40000 |00:06:37.77 |     175 |  5905K|  2393K| 5593K (0)|
|   4 |     WINDOW SORT       |       |      1 |  40000 |  40000 |00:00:00.02 |     175 |  1966K|   666K| 1747K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     175 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:48:10, written at 20:52:13
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch            243.07      243.04             1      243.07000      243.04000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  243.32      243.29             8       30.41500       30.41125
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:48:10, written at 20:52:13
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)      243.34      243.31             1      243.33500      243.31000
-------  ----------  ----------  ------------  -------------  -------------
Total        243.34      243.31             2      121.66750      121.65500
-------  ----------  ----------  ------------  -------------  -------------
407 rows written to MOD_QRY.csv
Summary for W/D = 10/4000 , bench_run_statistics_id = 414

Timer Set: Run_One, Constructed at 22 Nov 2016 20:48:10, written at 20:52:13
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          243.34      243.31             1      243.33500      243.31000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        243.34      243.31             2      121.66750      121.65500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","6294"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  0hf4h0kmpj82n, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","6294"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    406 |00:00:00.30 |     175 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  40000 |    406 |00:00:00.30 |     175 | 31744 | 31744 |28672  (0)|
|   2 |   VIEW                |       |      1 |  40000 |  40000 |00:00:06.57 |     175 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  40000 |  40000 |00:00:06.56 |     175 |  5691K|  2430K| 4633K (0)|
|   4 |     WINDOW SORT       |       |      1 |  40000 |  40000 |00:00:00.02 |     175 |  1966K|   666K| 1747K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     175 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:52:13, written at 20:52:14
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.30        0.29             1        0.29700        0.29000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.55        0.55             8        0.06838        0.06875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:52:13, written at 20:52:14
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.56        0.56             1        0.56300        0.56000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.56        0.56             2        0.28150        0.28000
-------  ----------  ----------  ------------  -------------  -------------
407 rows written to MOD_QRY_D.csv
Summary for W/D = 10/4000 , bench_run_statistics_id = 415

Timer Set: Run_One, Constructed at 22 Nov 2016 20:52:13, written at 20:52:14
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.56        0.56             1        0.56300        0.56000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.56        0.56             2        0.28150        0.28000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","8817"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  9gpxxhf686vmr, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","8817"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    406 |00:00:00.02 |     175 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  40000 |    406 |00:00:00.02 |     175 | 36864 | 36864 |32768  (0)|
|   2 |   VIEW                 |       |      1 |  40000 |    406 |00:00:00.02 |     175 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  40000 |    406 |00:00:00.02 |     175 |  1966K|   666K| 1747K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     175 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:52:14, written at 20:52:14
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.02        0.02             1        0.01600        0.02000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.23             1        0.23400        0.23000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.27        0.26             8        0.03313        0.03250
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:52:14, written at 20:52:14
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.28        0.28             1        0.28100        0.28000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.28        0.28             2        0.14050        0.14000
-------  ----------  ----------  ------------  -------------  -------------
407 rows written to MTH_QRY.csv
Summary for W/D = 10/4000 , bench_run_statistics_id = 416

Timer Set: Run_One, Constructed at 22 Nov 2016 20:52:14, written at 20:52:14
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.28        0.28             1        0.28100        0.28000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.28        0.28             2        0.14050        0.14000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","6385"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  cy67f0fxy493a, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","6385"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    406 |00:01:32.18 |     761K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     41 |    406 |00:01:32.18 |     761K| 31744 | 31744 |28672  (0)|
|   2 |   VIEW                                       |       |      1 |     41 |  40000 |00:01:32.18 |     761K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     41 |  40000 |00:01:32.17 |     761K|  1824K|   650K| 1621K (0)|
|   4 |     VIEW                                     |       |      1 |     41 |  40000 |00:01:55.25 |     761K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  40000 |00:01:55.24 |     761K|  2048 |  2048 | 2692K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     10 |00:00:00.04 |     175 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  40000 |     10 |00:00:00.04 |     175 |  3029K|   773K| 2692K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     175 |       |       |          |
|*  9 |       HASH JOIN                              |       |   4000 |     40 |  39990 |00:01:28.70 |     700K|  1214K|  1214K|  917K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   4000 |        |  40000 |00:00:00.01 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   4000 |  40000 |    160M|00:01:47.97 |     700K|       |       |          |
|  12 |         WINDOW SORT                          |       |   4000 |  40000 |    160M|00:01:25.76 |     700K|  1966K|   666K| 1747K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   4000 |  40000 |    160M|00:00:14.92 |     700K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 20:52:14, written at 20:53:46
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.02        0.02             1        0.01500        0.02000
First fetch             92.17       92.17             1       92.16700       92.17000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   92.43       92.44             8       11.55400       11.55500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:52:14, written at 20:53:46
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       92.45       92.44             1       92.44700       92.44000
-------  ----------  ----------  ------------  -------------  -------------
Total         92.45       92.44             2       46.22350       46.22000
-------  ----------  ----------  ------------  -------------  -------------
407 rows written to RSF_QRY.csv
Summary for W/D = 10/4000 , bench_run_statistics_id = 417

Timer Set: Run_One, Constructed at 22 Nov 2016 20:52:14, written at 20:53:46
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           92.45       92.44             1       92.44700       92.44000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         92.45       92.44             2       46.22350       46.22000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","8052"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  gvtmd6dudkcgg, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","8052"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    406 |00:00:00.31 |     106K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     19 |    406 |00:00:00.31 |     106K| 31744 | 31744 |28672  (0)|
|   2 |   VIEW                                       |              |      1 |     19 |  40000 |00:00:00.31 |     106K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     19 |  40000 |00:00:00.30 |     106K|  1824K|   650K| 1621K (0)|
|   4 |     VIEW                                     |              |      1 |     19 |  40000 |00:00:00.27 |     106K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  40000 |00:00:00.26 |     106K|  2048 |  2048 | 2692K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     10 |     10 |00:00:00.01 |      12 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     10 |     10 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   4000 |      9 |  39990 |00:00:00.13 |   45459 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   4000 |        |  40000 |00:00:00.01 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  40000 |      1 |  39990 |00:00:00.09 |   45459 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  40000 |    363 |  39990 |00:00:00.04 |    5469 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 20:53:46, written at 20:53:47
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.08        0.08             1        0.07800        0.08000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.31        0.31             1        0.31300        0.31000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.64        0.64             8        0.08013        0.08000
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:53:46, written at 20:53:47
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.66        0.65             1        0.65600        0.65000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.66        0.65             2        0.32800        0.32500
-------  ----------  ----------  ------------  -------------  -------------
407 rows written to RSF_TMP.csv
Summary for W/D = 10/4000 , bench_run_statistics_id = 418

Timer Set: Run_One, Constructed at 22 Nov 2016 20:53:46, written at 20:53:47
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.67        0.67             1        0.67200        0.67000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.67        0.67             2        0.33600        0.33500
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
80000 (8000) records (per category) added, average group size (from) = 105.4 (8000), # of groups = 75.9

Timer Set: Setup, Constructed at 22 Nov 2016 20:53:47, written at 20:53:52
==========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   4.36        4.17             1        4.36000        4.17000
Gather_Table_Stats        0.17        0.17             1        0.17100        0.17000
GRP_CNT                   0.03        0.03             1        0.03200        0.03000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     4.56        4.37             4        1.14075        1.09250
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","4753"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  8q3mrfktdgxrb, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","4753"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    808 |00:16:01.82 |     317 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  80000 |    808 |00:16:01.82 |     317 | 64512 | 64512 |57344  (0)|
|   2 |   VIEW                |       |      1 |  80000 |  80000 |00:17:19.69 |     317 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  80000 |  80000 |00:17:19.68 |     317 |    10M|  2393K| 9427K (0)|
|   4 |     WINDOW SORT       |       |      1 |  80000 |  80000 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 20:53:52, written at 21:09:54
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch            961.82      961.72             1      961.81800      961.72000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  962.08      961.99             8      120.26038      120.24875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 20:53:52, written at 21:09:54
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)      962.10      962.00             1      962.09900      962.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        962.10      962.00             2      481.04950      481.00000
-------  ----------  ----------  ------------  -------------  -------------
809 rows written to MOD_QRY.csv
Summary for W/D = 10/8000 , bench_run_statistics_id = 419

Timer Set: Run_One, Constructed at 22 Nov 2016 20:53:52, written at 21:09:54
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          962.11      962.02             1      962.11400      962.02000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        962.11      962.02             2      481.05700      481.01000
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","5063"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  crd5nyctragx8, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","5063"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    808 |00:00:00.60 |     317 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  80000 |    808 |00:00:00.60 |     317 | 64512 | 64512 |57344  (0)|
|   2 |   VIEW                |       |      1 |  80000 |  80000 |00:00:13.23 |     317 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  80000 |  80000 |00:00:13.22 |     317 |     9M|  2430K| 7938K (0)|
|   4 |     WINDOW SORT       |       |      1 |  80000 |  80000 |00:00:00.05 |     317 |  3880K|   845K| 3448K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:09:54, written at 21:09:55
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.59        0.59             1        0.59400        0.59000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.23             1        0.23400        0.23000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.84        0.84             8        0.10550        0.10500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:09:54, written at 21:09:55
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.86        0.86             1        0.86000        0.86000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.86        0.86             2        0.43000        0.43000
-------  ----------  ----------  ------------  -------------  -------------
809 rows written to MOD_QRY_D.csv
Summary for W/D = 10/8000 , bench_run_statistics_id = 420

Timer Set: Run_One, Constructed at 22 Nov 2016 21:09:54, written at 21:09:55
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.88        0.88             1        0.87500        0.88000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.88        0.88             2        0.43750        0.44000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","4828"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  d29ms2dn9rgtm, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","4828"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    808 |00:00:00.04 |     317 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  80000 |    808 |00:00:00.04 |     317 | 66560 | 66560 |59392  (0)|
|   2 |   VIEW                 |       |      1 |  80000 |    808 |00:00:00.05 |     317 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  80000 |    808 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:09:55, written at 21:09:55
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.05        0.05             1        0.04700        0.05000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.23             1        0.23400        0.23000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.30        0.29             8        0.03713        0.03625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:09:55, written at 21:09:55
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.31        0.29             1        0.31300        0.29000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.31        0.29             2        0.15650        0.14500
-------  ----------  ----------  ------------  -------------  -------------
809 rows written to MTH_QRY.csv
Summary for W/D = 10/8000 , bench_run_statistics_id = 421

Timer Set: Run_One, Constructed at 22 Nov 2016 21:09:55, written at 21:09:55
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.31        0.29             1        0.31300        0.29000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.31        0.29             2        0.15650        0.14500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","3576"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  d4mcycx55uxzx, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","3576"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    808 |00:06:08.73 |    2675K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     81 |    808 |00:06:08.73 |    2675K| 64512 | 64512 |57344  (0)|
|   2 |   VIEW                                       |       |      1 |     81 |  80000 |00:06:08.73 |    2675K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     81 |  80000 |00:06:08.71 |    2675K|  3596K|   822K| 3196K (0)|
|   4 |     VIEW                                     |       |      1 |     81 |  80000 |00:07:42.33 |    2675K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  80000 |00:07:42.31 |    2675K|  2048 |  2048 | 5275K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     10 |00:00:00.08 |     317 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  80000 |     10 |00:00:00.08 |     317 |  6077K|  1001K| 5401K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
|*  9 |       HASH JOIN                              |       |   8000 |     80 |  79990 |00:05:53.90 |    2536K|  1214K|  1214K|  907K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   8000 |        |  80000 |00:00:00.03 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   8000 |  80000 |    640M|00:07:12.12 |    2536K|       |       |          |
|  12 |         WINDOW SORT                          |       |   8000 |  80000 |    640M|00:05:40.94 |    2536K|  3880K|   845K| 3448K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   8000 |  80000 |    640M|00:01:03.35 |    2536K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 21:09:55, written at 21:16:04
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch            368.73      368.70             1      368.73100      368.70000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  368.98      368.95             8       46.12263       46.11875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:09:55, written at 21:16:04
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)      369.00      368.97             1      368.99700      368.97000
-------  ----------  ----------  ------------  -------------  -------------
Total        369.00      368.97             2      184.49850      184.48500
-------  ----------  ----------  ------------  -------------  -------------
809 rows written to RSF_QRY.csv
Summary for W/D = 10/8000 , bench_run_statistics_id = 422

Timer Set: Run_One, Constructed at 22 Nov 2016 21:09:55, written at 21:16:04
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          369.00      368.97             1      368.99700      368.97000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        369.00      368.97             2      184.49850      184.48500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","9822"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  cnnm0wa8kvur0, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","9822"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    808 |00:00:00.64 |     229K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     22 |    808 |00:00:00.64 |     229K| 64512 | 64512 |57344  (0)|
|   2 |   VIEW                                       |              |      1 |     22 |  80000 |00:00:00.63 |     229K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     22 |  80000 |00:00:00.62 |     229K|  3596K|   822K| 3196K (0)|
|   4 |     VIEW                                     |              |      1 |     22 |  80000 |00:00:00.56 |     229K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  80000 |00:00:00.55 |     229K|  2048 |  2048 | 5275K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     10 |     10 |00:00:00.01 |      12 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     10 |     10 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   8000 |     12 |  79990 |00:00:00.26 |   90925 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   8000 |        |  80000 |00:00:00.02 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  80000 |      1 |  79990 |00:00:00.19 |   90925 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  80000 |    948 |  79990 |00:00:00.08 |   10935 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 21:16:04, written at 21:16:05
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.13        0.12             1        0.12500        0.12000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch              0.63        0.62             1        0.62500        0.62000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.27        0.27             1        0.26600        0.27000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    1.05        1.05             8        0.13088        0.13125
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:16:04, written at 21:16:05
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        1.09        1.06             1        1.09300        1.06000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.09        1.06             2        0.54650        0.53000
-------  ----------  ----------  ------------  -------------  -------------
809 rows written to RSF_TMP.csv
Summary for W/D = 10/8000 , bench_run_statistics_id = 423

Timer Set: Run_One, Constructed at 22 Nov 2016 21:16:04, written at 21:16:05
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            1.09        1.06             1        1.09300        1.06000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.09        1.06             2        0.54650        0.53000
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
20000 (1000) records (per category) added, average group size (from) = 131.6 (1000), # of groups = 7.6

Timer Set: Setup, Constructed at 22 Nov 2016 21:16:05, written at 21:16:06
==========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   1.17        1.08             1        1.17200        1.08000
Gather_Table_Stats        0.08        0.06             1        0.07800        0.06000
GRP_CNT                   0.00        0.00             1        0.00000        0.00000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     1.25        1.14             4        0.31250        0.28500
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","8607"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  4bxcp23jrtkwp, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","8607"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    209 |00:00:47.25 |      68 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  20000 |    209 |00:00:47.25 |      68 | 15360 | 15360 |14336  (0)|
|   2 |   VIEW                |       |      1 |  20000 |  20000 |00:00:15.01 |      68 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  20000 |  20000 |00:00:15.01 |      68 |  2990K|  1197K| 3622K (0)|
|   4 |     WINDOW SORT       |       |      1 |  20000 |  20000 |00:00:00.01 |      68 |  1045K|   546K|  928K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:16:06, written at 21:16:54
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             47.26       47.25             1       47.25700       47.25000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.23             1        0.23400        0.23000
(Other)                  0.02        0.00             1        0.01500        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   47.51       47.48             8        5.93825        5.93500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:16:06, written at 21:16:54
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       47.52       47.48             1       47.52200       47.48000
-------  ----------  ----------  ------------  -------------  -------------
Total         47.52       47.48             2       23.76100       23.74000
-------  ----------  ----------  ------------  -------------  -------------
210 rows written to MOD_QRY.csv
Summary for W/D = 20/1000 , bench_run_statistics_id = 424

Timer Set: Run_One, Constructed at 22 Nov 2016 21:16:06, written at 21:16:54
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           47.52       47.48             1       47.52200       47.48000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         47.52       47.48             2       23.76100       23.74000
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","6518"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  b95sanccf7mtt, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","6518"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    209 |00:00:00.15 |      68 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  20000 |    209 |00:00:00.15 |      68 | 15360 | 15360 |14336  (0)|
|   2 |   VIEW                |       |      1 |  20000 |  20000 |00:00:00.06 |      68 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  20000 |  20000 |00:00:00.06 |      68 |  2883K|  1215K| 2472K (0)|
|   4 |     WINDOW SORT       |       |      1 |  20000 |  20000 |00:00:00.01 |      68 |  1045K|   546K|  928K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:16:54, written at 21:16:54
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.16        0.15             1        0.15700        0.15000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.39        0.39             8        0.04888        0.04875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:16:54, written at 21:16:54
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.41        0.39             1        0.40700        0.39000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.41        0.39             2        0.20350        0.19500
-------  ----------  ----------  ------------  -------------  -------------
210 rows written to MOD_QRY_D.csv
Summary for W/D = 20/1000 , bench_run_statistics_id = 425

Timer Set: Run_One, Constructed at 22 Nov 2016 21:16:54, written at 21:16:54
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.42        0.40             1        0.42200        0.40000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.42        0.40             2        0.21100        0.20000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","6028"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  4kcs7ncpmdy5g, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","6028"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    209 |00:00:00.01 |      68 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  20000 |    209 |00:00:00.01 |      68 | 29696 | 29696 |26624  (0)|
|   2 |   VIEW                 |       |      1 |  20000 |    209 |00:00:00.01 |      68 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  20000 |    209 |00:00:00.01 |      68 |  1045K|   546K|  928K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:16:54, written at 21:16:54
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.02        0.01             1        0.01600        0.01000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.27        0.27             8        0.03325        0.03375
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:16:54, written at 21:16:55
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.28        0.27             1        0.28200        0.27000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.28        0.27             2        0.14100        0.13500
-------  ----------  ----------  ------------  -------------  -------------
210 rows written to MTH_QRY.csv
Summary for W/D = 20/1000 , bench_run_statistics_id = 426

Timer Set: Run_One, Constructed at 22 Nov 2016 21:16:54, written at 21:16:55
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.28        0.27             1        0.28200        0.27000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.28        0.27             2        0.14100        0.13500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","4605"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  a9kr3zh8uynnp, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","4605"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    209 |00:00:11.62 |   91913 |       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     11 |    209 |00:00:11.62 |   91913 | 15360 | 15360 |14336  (0)|
|   2 |   VIEW                                       |       |      1 |     11 |  20000 |00:00:11.62 |   91913 |       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     11 |  20000 |00:00:11.62 |   91913 |   974K|   535K|  865K (0)|
|   4 |     VIEW                                     |       |      1 |     11 |  20000 |00:00:20.48 |   91913 |       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  20000 |00:00:20.48 |   91913 |  2048 |  2048 | 1369K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     20 |00:00:00.02 |      68 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  20000 |     20 |00:00:00.02 |      68 |  1541K|   615K| 1369K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  20000 |  20000 |00:00:00.01 |      68 |       |       |          |
|*  9 |       HASH JOIN                              |       |   1000 |     10 |  19980 |00:00:11.33 |   68000 |  1214K|  1214K| 1112K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   1000 |        |  20000 |00:00:00.01 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   1000 |  20000 |     20M|00:00:13.45 |   68000 |       |       |          |
|  12 |         WINDOW SORT                          |       |   1000 |  20000 |     20M|00:00:10.68 |   68000 |  1045K|   546K|  928K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   1000 |  20000 |     20M|00:00:01.88 |   68000 |       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 21:16:55, written at 21:17:06
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             11.63       11.63             1       11.62600       11.63000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.24        0.23             1        0.23500        0.23000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   11.86       11.86             8        1.48263        1.48250
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:16:55, written at 21:17:06
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       11.88       11.88             1       11.87600       11.88000
-------  ----------  ----------  ------------  -------------  -------------
Total         11.88       11.88             2        5.93800        5.94000
-------  ----------  ----------  ------------  -------------  -------------
210 rows written to RSF_QRY.csv
Summary for W/D = 20/1000 , bench_run_statistics_id = 427

Timer Set: Run_One, Constructed at 22 Nov 2016 21:16:55, written at 21:17:06
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           11.88       11.88             1       11.87600       11.88000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         11.88       11.88             2        5.93800        5.94000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","9441"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  5ry01680bjj8n, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","9441"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    209 |00:00:00.14 |   45554 |       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     40 |    209 |00:00:00.14 |   45554 | 15360 | 15360 |14336  (0)|
|   2 |   VIEW                                       |              |      1 |     40 |  20000 |00:00:00.14 |   45554 |       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     40 |  20000 |00:00:00.13 |   45554 |   974K|   535K|  865K (0)|
|   4 |     VIEW                                     |              |      1 |     40 |  20000 |00:00:00.13 |   45554 |       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  20000 |00:00:00.13 |   45554 |  2048 |  2048 | 1369K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     20 |     20 |00:00:00.01 |      22 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     20 |     20 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   1000 |     20 |  19980 |00:00:00.06 |   21687 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   1000 |        |  20000 |00:00:00.01 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  20000 |      1 |  19980 |00:00:00.05 |   21687 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  20000 |    200 |  19980 |00:00:00.02 |    1707 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 21:17:06, written at 21:17:07
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.05        0.05             1        0.04700        0.05000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.14        0.14             1        0.14100        0.14000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.44        0.44             8        0.05475        0.05500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:17:06, written at 21:17:07
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.50        0.46             1        0.50000        0.46000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.50        0.46             2        0.25000        0.23000
-------  ----------  ----------  ------------  -------------  -------------
210 rows written to RSF_TMP.csv
Summary for W/D = 20/1000 , bench_run_statistics_id = 428

Timer Set: Run_One, Constructed at 22 Nov 2016 21:17:06, written at 21:17:07
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.50        0.46             1        0.50000        0.46000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.50        0.46             2        0.25000        0.23000
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
40000 (2000) records (per category) added, average group size (from) = 121.2 (2000), # of groups = 16.5

Timer Set: Setup, Constructed at 22 Nov 2016 21:17:07, written at 21:17:09
==========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   2.14        2.13             1        2.14000        2.13000
Gather_Table_Stats        0.09        0.09             1        0.09400        0.09000
GRP_CNT                   0.02        0.02             1        0.01600        0.02000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     2.25        2.24             4        0.56250        0.56000
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","1323"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  16wxjdc8g657n, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","1323"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    411 |00:00:43.83 |     191 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  40000 |    411 |00:00:43.83 |     191 | 31744 | 31744 |28672  (0)|
|   2 |   VIEW                |       |      1 |  40000 |  40000 |00:02:09.97 |     191 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  40000 |  40000 |00:02:09.96 |     191 |  5905K|  2393K| 5813K (0)|
|   4 |     WINDOW SORT       |       |      1 |  40000 |  40000 |00:00:00.02 |     191 |  2037K|   674K| 1810K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:17:09, written at 21:20:19
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch            189.50      189.50             1      189.50400      189.50000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.24        0.24             1        0.23500        0.24000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  189.74      189.74             8       23.71738       23.71750
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:17:09, written at 21:20:19
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)      189.75      189.75             1      189.75400      189.75000
-------  ----------  ----------  ------------  -------------  -------------
Total        189.75      189.75             2       94.87700       94.87500
-------  ----------  ----------  ------------  -------------  -------------
412 rows written to MOD_QRY.csv
Summary for W/D = 20/2000 , bench_run_statistics_id = 429

Timer Set: Run_One, Constructed at 22 Nov 2016 21:17:09, written at 21:20:19
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          189.75      189.75             1      189.75400      189.75000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        189.75      189.75             2       94.87700       94.87500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","2053"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  0t5a2v1yy5v0q, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","2053"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    411 |00:00:00.30 |     191 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  40000 |    411 |00:00:00.30 |     191 | 31744 | 31744 |28672  (0)|
|   2 |   VIEW                |       |      1 |  40000 |  40000 |00:00:01.72 |     191 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  40000 |  40000 |00:00:01.71 |     191 |  5691K|  2430K| 4326K (0)|
|   4 |     WINDOW SORT       |       |      1 |  40000 |  40000 |00:00:00.02 |     191 |  2037K|   674K| 1810K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:20:19, written at 21:20:19
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.30        0.30             1        0.29800        0.30000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.22        0.22             1        0.21800        0.22000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.53        0.53             8        0.06638        0.06625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:20:19, written at 21:20:20
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.55        0.55             1        0.54700        0.55000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.55        0.55             2        0.27350        0.27500
-------  ----------  ----------  ------------  -------------  -------------
412 rows written to MOD_QRY_D.csv
Summary for W/D = 20/2000 , bench_run_statistics_id = 430

Timer Set: Run_One, Constructed at 22 Nov 2016 21:20:19, written at 21:20:20
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.56        0.56             1        0.56300        0.56000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.56        0.56             2        0.28150        0.28000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","6319"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  1fqt0thpqm2n3, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","6319"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    411 |00:00:00.02 |     191 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  40000 |    411 |00:00:00.02 |     191 | 40960 | 40960 |36864  (0)|
|   2 |   VIEW                 |       |      1 |  40000 |    411 |00:00:00.02 |     191 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  40000 |    411 |00:00:00.02 |     191 |  2037K|   674K| 1810K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:20:20, written at 21:20:20
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.02        0.01             1        0.01600        0.01000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.27        0.27             8        0.03313        0.03375
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:20:20, written at 21:20:20
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.28        0.27             1        0.28100        0.27000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.28        0.27             2        0.14050        0.13500
-------  ----------  ----------  ------------  -------------  -------------
412 rows written to MTH_QRY.csv
Summary for W/D = 20/2000 , bench_run_statistics_id = 431

Timer Set: Run_One, Constructed at 22 Nov 2016 21:20:20, written at 21:20:20
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.28        0.27             1        0.28100        0.27000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.28        0.27             2        0.14050        0.13500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","817"' FROM final_grouping GROUP BY cat, final_grp ORDER BY c
at, final_grp

SQL_ID  g15k7qzf897dz, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","817"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    411 |00:00:45.97 |     443K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     21 |    411 |00:00:45.97 |     443K| 31744 | 31744 |28672  (0)|
|   2 |   VIEW                                       |       |      1 |     21 |  40000 |00:00:45.97 |     443K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     21 |  40000 |00:00:45.96 |     443K|  1895K|   658K| 1684K (0)|
|   4 |     VIEW                                     |       |      1 |     21 |  40000 |00:01:21.19 |     443K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  40000 |00:01:21.18 |     443K|  2048 |  2048 | 2692K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     20 |00:00:00.04 |     191 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  40000 |     20 |00:00:00.04 |     191 |  3029K|   773K| 2692K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
|*  9 |       HASH JOIN                              |       |   2000 |     20 |  39980 |00:00:45.00 |     382K|  1214K|  1214K| 1149K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   2000 |        |  40000 |00:00:00.01 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   2000 |  40000 |     80M|00:00:53.80 |     382K|       |       |          |
|  12 |         WINDOW SORT                          |       |   2000 |  40000 |     80M|00:00:42.76 |     382K|  2037K|   674K| 1810K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   2000 |  40000 |     80M|00:00:07.33 |     382K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 21:20:20, written at 21:21:06
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             45.97       45.99             1       45.97300       45.99000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   46.22       46.24             8        5.77788        5.78000
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:20:20, written at 21:21:06
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       46.22       46.24             1       46.22300       46.24000
-------  ----------  ----------  ------------  -------------  -------------
Total         46.22       46.24             2       23.11150       23.12000
-------  ----------  ----------  ------------  -------------  -------------
412 rows written to RSF_QRY.csv
Summary for W/D = 20/2000 , bench_run_statistics_id = 432

Timer Set: Run_One, Constructed at 22 Nov 2016 21:20:20, written at 21:21:06
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           46.24       46.25             1       46.23900       46.25000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         46.24       46.25             2       23.11950       23.12500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","678"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  5r497hrv1bnmk, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","678"' FROM final_grouping GROUP BY cat, final_grp ORDER
BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    411 |00:00:00.29 |     104K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     38 |    411 |00:00:00.29 |     104K| 31744 | 31744 |28672  (0)|
|   2 |   VIEW                                       |              |      1 |     38 |  40000 |00:00:00.29 |     104K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     38 |  40000 |00:00:00.29 |     104K|  1895K|   658K| 1684K (0)|
|   4 |     VIEW                                     |              |      1 |     38 |  40000 |00:00:00.28 |     104K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  40000 |00:00:00.27 |     104K|  2048 |  2048 | 2692K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     20 |     20 |00:00:00.01 |      22 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     20 |     20 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   2000 |     18 |  39980 |00:00:00.13 |   43419 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   2000 |        |  40000 |00:00:00.01 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  40000 |      1 |  39980 |00:00:00.09 |   43419 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  40000 |    351 |  39980 |00:00:00.04 |    3439 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 21:21:06, written at 21:21:07
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.06        0.06             1        0.06200        0.06000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch              0.30        0.29             1        0.29700        0.29000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.64        0.64             8        0.08013        0.08000
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:21:06, written at 21:21:07
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.64        0.64             1        0.64100        0.64000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.64        0.64             2        0.32050        0.32000
-------  ----------  ----------  ------------  -------------  -------------
412 rows written to RSF_TMP.csv
Summary for W/D = 20/2000 , bench_run_statistics_id = 433

Timer Set: Run_One, Constructed at 22 Nov 2016 21:21:06, written at 21:21:07
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.66        0.66             1        0.65600        0.66000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.66        0.66             2        0.32800        0.33000
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
80000 (4000) records (per category) added, average group size (from) = 113.2 (4000), # of groups = 35.35

Timer Set: Setup, Constructed at 22 Nov 2016 21:21:07, written at 21:21:13
==========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   5.80        4.25             1        5.79800        4.25000
Gather_Table_Stats        0.16        0.16             1        0.15600        0.16000
GRP_CNT                   0.03        0.03             1        0.03100        0.03000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     5.99        4.44             4        1.49625        1.11000
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","5061"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  0hx4f962n9g70, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","5061"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    815 |00:12:41.97 |     317 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  80000 |    815 |00:12:41.97 |     317 | 64512 | 64512 |57344  (0)|
|   2 |   VIEW                |       |      1 |  80000 |  80000 |00:06:25.46 |     317 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  80000 |  80000 |00:06:25.45 |     317 |    10M|  2393K| 9929K (0)|
|   4 |     WINDOW SORT       |       |      1 |  80000 |  80000 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:21:13, written at 21:33:55
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch            761.97      761.89             1      761.96700      761.89000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.24        0.23             1        0.23500        0.23000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  762.22      762.14             8       95.27725       95.26750
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:21:13, written at 21:33:55
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)      762.23      762.16             1      762.23300      762.16000
-------  ----------  ----------  ------------  -------------  -------------
Total        762.23      762.16             2      381.11650      381.08000
-------  ----------  ----------  ------------  -------------  -------------
816 rows written to MOD_QRY.csv
Summary for W/D = 20/4000 , bench_run_statistics_id = 434

Timer Set: Run_One, Constructed at 22 Nov 2016 21:21:13, written at 21:33:55
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          762.25      762.17             1      762.24900      762.17000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        762.25      762.17             2      381.12450      381.08500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","3377"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  0hmy4jzyus8am, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","3377"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    815 |00:00:00.60 |     317 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  80000 |    815 |00:00:00.60 |     317 | 64512 | 64512 |57344  (0)|
|   2 |   VIEW                |       |      1 |  80000 |  80000 |00:00:03.49 |     317 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  80000 |  80000 |00:00:03.48 |     317 |     9M|  2430K| 7934K (0)|
|   4 |     WINDOW SORT       |       |      1 |  80000 |  80000 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:33:55, written at 21:33:56
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.59        0.59             1        0.59400        0.59000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.24             1        0.23400        0.24000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.84        0.85             8        0.10550        0.10625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:33:55, written at 21:33:56
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.86        0.86             1        0.85900        0.86000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.86        0.86             2        0.42950        0.43000
-------  ----------  ----------  ------------  -------------  -------------
816 rows written to MOD_QRY_D.csv
Summary for W/D = 20/4000 , bench_run_statistics_id = 435

Timer Set: Run_One, Constructed at 22 Nov 2016 21:33:55, written at 21:33:56
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.86        0.86             1        0.85900        0.86000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.86        0.86             2        0.42950        0.43000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","160"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LAS
T (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  0zbz2m6f8nw1j, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","160"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    815 |00:00:00.04 |     317 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  80000 |    815 |00:00:00.04 |     317 | 66560 | 66560 |59392  (0)|
|   2 |   VIEW                 |       |      1 |  80000 |    815 |00:00:00.04 |     317 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  80000 |    815 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:33:56, written at 21:33:56
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.03        0.04             1        0.03100        0.04000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.23             1        0.23400        0.23000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.28        0.28             8        0.03513        0.03500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:33:56, written at 21:33:56
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.33        0.30             1        0.32800        0.30000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.33        0.30             2        0.16400        0.15000
-------  ----------  ----------  ------------  -------------  -------------
816 rows written to MTH_QRY.csv
Summary for W/D = 20/4000 , bench_run_statistics_id = 436

Timer Set: Run_One, Constructed at 22 Nov 2016 21:33:56, written at 21:33:56
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.33        0.30             1        0.32800        0.30000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.33        0.30             2        0.16400        0.15000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","8422"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  6fvtbjwzfpj1p, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","8422"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    815 |00:03:04.83 |    1407K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     41 |    815 |00:03:04.83 |    1407K| 64512 | 64512 |57344  (0)|
|   2 |   VIEW                                       |       |      1 |     41 |  80000 |00:03:04.83 |    1407K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     41 |  80000 |00:03:04.82 |    1407K|  3667K|   828K| 3259K (0)|
|   4 |     VIEW                                     |       |      1 |     41 |  80000 |00:05:26.75 |    1407K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  80000 |00:05:26.73 |    1407K|  2048 |  2048 | 5338K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     20 |00:00:00.08 |     317 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  80000 |     20 |00:00:00.08 |     317 |  6077K|  1001K| 5401K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
|*  9 |       HASH JOIN                              |       |   4000 |     40 |  79980 |00:03:01.04 |    1268K|  1214K|  1214K| 1150K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   4000 |        |  80000 |00:00:00.02 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   4000 |  80000 |    320M|00:03:36.41 |    1268K|       |       |          |
|  12 |         WINDOW SORT                          |       |   4000 |  80000 |    320M|00:02:52.25 |    1268K|  3880K|   845K| 3448K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   4000 |  80000 |    320M|00:00:28.25 |    1268K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 21:33:56, written at 21:37:01
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch            184.83      184.83             1      184.83200      184.83000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.23        0.23             1        0.23400        0.23000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  185.08      185.08             8       23.13525       23.13500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:33:56, written at 21:37:01
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)      185.10      185.10             1      185.09800      185.10000
-------  ----------  ----------  ------------  -------------  -------------
Total        185.10      185.10             2       92.54900       92.55000
-------  ----------  ----------  ------------  -------------  -------------
816 rows written to RSF_QRY.csv
Summary for W/D = 20/4000 , bench_run_statistics_id = 437

Timer Set: Run_One, Constructed at 22 Nov 2016 21:33:56, written at 21:37:01
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          185.11      185.11             1      185.11300      185.11000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        185.11      185.11             2       92.55650       92.55500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","5419"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  5mjfc53d2x2xv, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","5419"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    815 |00:00:00.62 |     225K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     40 |    815 |00:00:00.62 |     225K| 64512 | 64512 |57344  (0)|
|   2 |   VIEW                                       |              |      1 |     40 |  80000 |00:00:00.62 |     225K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     40 |  80000 |00:00:00.60 |     225K|  3667K|   828K| 3259K (0)|
|   4 |     VIEW                                     |              |      1 |     40 |  80000 |00:00:00.58 |     225K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  80000 |00:00:00.56 |     225K|  2048 |  2048 | 5338K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     20 |     20 |00:00:00.01 |      22 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     20 |     20 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   4000 |     20 |  79980 |00:00:00.26 |   86855 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   4000 |        |  80000 |00:00:00.02 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  80000 |      1 |  79980 |00:00:00.19 |   86855 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  80000 |    729 |  79980 |00:00:00.08 |    6875 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 21:37:01, written at 21:37:02
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.13        0.12             1        0.12500        0.12000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch              0.63        0.62             1        0.62500        0.62000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.25        0.25             1        0.25000        0.25000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    1.03        1.03             8        0.12900        0.12875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:37:01, written at 21:37:02
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        1.05        1.03             1        1.04700        1.03000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.05        1.03             2        0.52350        0.51500
-------  ----------  ----------  ------------  -------------  -------------
816 rows written to RSF_TMP.csv
Summary for W/D = 20/4000 , bench_run_statistics_id = 438

Timer Set: Run_One, Constructed at 22 Nov 2016 21:37:01, written at 21:37:02
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            1.05        1.03             1        1.04700        1.03000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.05        1.03             2        0.52350        0.51500
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
160000 (8000) records (per category) added, average group size (from) = 111.8 (8000), # of groups = 71.55

Timer Set: Setup, Constructed at 22 Nov 2016 21:37:02, written at 21:37:13
==========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                  10.10        8.42             1       10.09500        8.42000
Gather_Table_Stats        0.36        0.33             1        0.35900        0.33000
GRP_CNT                   0.06        0.06             1        0.06300        0.06000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                    10.52        8.81             4        2.62925        2.20250
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","2205"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  47v5h9n80mrbv, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","2205"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   1618 |00:34:42.19 |     569 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    160K|   1618 |00:34:42.19 |     569 |   124K|   124K|  110K (0)|
|   2 |   VIEW                |       |      1 |    160K|    160K|00:14:06.82 |     569 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |    160K|    160K|00:14:06.79 |     569 |    20M|  4787K|   18M (0)|
|   4 |     WINDOW SORT       |       |      1 |    160K|    160K|00:00:00.09 |     569 |  7636K|  1095K| 6787K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    160K|    160K|00:00:00.01 |     569 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 21:37:13, written at 22:11:55
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch          2,082.19    2,082.06             1    2,082.19200    2,082.06000
Write to file            0.02        0.01             3        0.00533        0.00333
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.28        0.29             1        0.28100        0.29000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                2,082.50    2,082.38            10      208.25040      208.23800
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 21:37:13, written at 22:11:55
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.02        0.01             2        0.00800        0.00500
(Other)    2,082.50    2,082.38             1    2,082.50400    2,082.38000
-------  ----------  ----------  ------------  -------------  -------------
Total      2,082.52    2,082.39             3      694.17333      694.13000
-------  ----------  ----------  ------------  -------------  -------------
1619 rows written to MOD_QRY.csv
Summary for W/D = 20/8000 , bench_run_statistics_id = 439

Timer Set: Run_One, Constructed at 22 Nov 2016 21:37:13, written at 22:11:55
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run        2,082.54    2,082.41             1    2,082.53500    2,082.41000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total      2,082.54    2,082.41             2    1,041.26750    1,041.20500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","728"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  0523ckj4rxzfz, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","728"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   1618 |00:00:01.21 |     569 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    160K|   1618 |00:00:01.21 |     569 |   124K|   124K|  110K (0)|
|   2 |   VIEW                |       |      1 |    160K|    160K|00:00:19.82 |     569 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |    160K|    160K|00:00:19.80 |     569 |    18M|  2430K|   15M (0)|
|   4 |     WINDOW SORT       |       |      1 |    160K|    160K|00:00:00.09 |     569 |  7636K|  1095K| 6787K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    160K|    160K|00:00:00.01 |     569 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:11:55, written at 22:11:57
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              1.20        1.21             1        1.20300        1.21000
Write to file            0.00        0.00             3        0.00000        0.00000
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.28        0.28             1        0.28200        0.28000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    1.50        1.50            10        0.15010        0.15000
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:11:55, written at 22:11:57
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)        1.52        1.50             1        1.51600        1.50000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.52        1.50             3        0.50533        0.50000
-------  ----------  ----------  ------------  -------------  -------------
1619 rows written to MOD_QRY_D.csv
Summary for W/D = 20/8000 , bench_run_statistics_id = 440

Timer Set: Run_One, Constructed at 22 Nov 2016 22:11:55, written at 22:11:57
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            1.52        1.50             1        1.51600        1.50000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.52        1.50             2        0.75800        0.75000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","1576"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  bsf5kqrw5gf4t, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","1576"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |   1618 |00:00:00.09 |     569 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |    160K|   1618 |00:00:00.09 |     569 |   133K|   133K|  118K (0)|
|   2 |   VIEW                 |       |      1 |    160K|   1618 |00:00:00.08 |     569 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |    160K|   1618 |00:00:00.08 |     569 |  7636K|  1095K| 6787K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |    160K|    160K|00:00:00.01 |     569 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:11:57, written at 22:11:57
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.09        0.10             1        0.09400        0.10000
Write to file            0.00        0.00             3        0.00000        0.00000
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.30        0.26             1        0.29600        0.26000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.39        0.36            10        0.03900        0.03600
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:11:57, written at 22:11:57
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)        0.39        0.36             1        0.39000        0.36000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.39        0.36             3        0.13000        0.12000
-------  ----------  ----------  ------------  -------------  -------------
1619 rows written to MTH_QRY.csv
Summary for W/D = 20/8000 , bench_run_statistics_id = 441

Timer Set: Run_One, Constructed at 22 Nov 2016 22:11:57, written at 22:11:57
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.41        0.38             1        0.40600        0.38000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.41        0.38             2        0.20300        0.19000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","407"' FROM final_grouping GROUP BY cat, final_grp ORDER BY c
at, final_grp

SQL_ID  50705jnaz6wnw, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","407"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |   1618 |00:12:29.80 |    4851K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     81 |   1618 |00:12:29.80 |    4851K|   124K|   124K|  110K (0)|
|   2 |   VIEW                                       |       |      1 |     81 |    160K|00:12:29.79 |    4851K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     81 |    160K|00:12:29.77 |    4851K|  7211K|  1071K| 6409K (0)|
|   4 |     VIEW                                     |       |      1 |     81 |    160K|00:22:12.43 |    4851K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |    160K|00:22:12.39 |    4851K|  2048 |  2048 |   10M (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     20 |00:00:00.16 |     569 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |    160K|     20 |00:00:00.16 |     569 |    11M|  1321K|   10M (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |    160K|    160K|00:00:00.02 |     569 |       |       |          |
|*  9 |       HASH JOIN                              |       |   8000 |     80 |    159K|00:12:14.36 |    4552K|  1214K|  1214K| 1133K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   8000 |        |    160K|00:00:00.06 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   8000 |    160K|   1280M|00:14:47.56 |    4552K|       |       |          |
|  12 |         WINDOW SORT                          |       |   8000 |    160K|   1280M|00:11:49.39 |    4552K|  7636K|  1095K| 6787K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   8000 |    160K|   1280M|00:02:02.85 |    4552K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 22:11:57, written at 22:24:27
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch            749.81      749.77             1      749.80600      749.77000
Write to file            0.00        0.00             3        0.00000        0.00000
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.28        0.28             1        0.28100        0.28000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  750.10      750.06            10       75.01030       75.00600
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:11:57, written at 22:24:27
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)      750.12      750.08             1      750.11900      750.08000
-------  ----------  ----------  ------------  -------------  -------------
Total        750.12      750.08             3      250.03967      250.02667
-------  ----------  ----------  ------------  -------------  -------------
1619 rows written to RSF_QRY.csv
Summary for W/D = 20/8000 , bench_run_statistics_id = 442

Timer Set: Run_One, Constructed at 22 Nov 2016 22:11:57, written at 22:24:27
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          750.14      750.09             1      750.13500      750.09000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        750.14      750.09             2      375.06750      375.04500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","207"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  cjawkzdjn6r07, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","207"' FROM final_grouping GROUP BY cat, final_grp ORDER
BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |   1618 |00:00:01.27 |     475K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     40 |   1618 |00:00:01.27 |     475K|   124K|   124K|  110K (0)|
|   2 |   VIEW                                       |              |      1 |     40 |    160K|00:00:01.27 |     475K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     40 |    160K|00:00:01.24 |     475K|  7211K|  1071K| 6409K (0)|
|   4 |     VIEW                                     |              |      1 |     40 |    160K|00:00:01.24 |     475K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |    160K|00:00:01.21 |     475K|  2048 |  2048 |   10M (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     20 |     20 |00:00:00.01 |      23 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     20 |     20 |00:00:00.01 |       3 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   8000 |     20 |    159K|00:00:00.55 |     177K|       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   8000 |        |    160K|00:00:00.03 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |    160K|      1 |    159K|00:00:00.38 |     177K|       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |    160K|   1592 |    159K|00:00:00.16 |   17111 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 22:24:27, written at 22:24:29
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.27        0.26             1        0.26600        0.26000
Open cursor              0.02        0.02             1        0.01500        0.02000
First fetch              1.27        1.26             1        1.26600        1.26000
Write to file            0.00        0.00             3        0.00000        0.00000
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.30        0.30             1        0.29700        0.30000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    1.86        1.86            10        0.18590        0.18600
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:24:27, written at 22:24:29
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)        1.88        1.88             1        1.87500        1.88000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.88        1.88             3        0.62500        0.62667
-------  ----------  ----------  ------------  -------------  -------------
1619 rows written to RSF_TMP.csv
Summary for W/D = 20/8000 , bench_run_statistics_id = 443

Timer Set: Run_One, Constructed at 22 Nov 2016 22:24:27, written at 22:24:29
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            1.88        1.88             1        1.87500        1.88000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.88        1.88             2        0.93750        0.94000
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
40000 (1000) records (per category) added, average group size (from) = 155.6 (1000), # of groups = 6.425

Timer Set: Setup, Constructed at 22 Nov 2016 22:24:29, written at 22:24:32
==========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   2.36        2.14             1        2.36000        2.14000
Gather_Table_Stats        0.14        0.14             1        0.14100        0.14000
GRP_CNT                   0.02        0.02             1        0.01500        0.02000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     2.52        2.30             4        0.62900        0.57500
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","2654"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  chcj3ma3q1kz9, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","2654"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    422 |00:01:39.13 |     191 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  40000 |    422 |00:01:39.13 |     191 | 31744 | 31744 |28672  (0)|
|   2 |   VIEW                |       |      1 |  40000 |  40000 |00:10:50.23 |     191 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  40000 |  40000 |00:10:50.22 |     191 |  5905K|  2393K| 5190K (0)|
|   4 |     WINDOW SORT       |       |      1 |  40000 |  40000 |00:00:00.02 |     191 |  2037K|   674K| 1810K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:24:32, written at 22:26:11
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch             99.12       99.12             1       99.12400       99.12000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.30        0.30             1        0.29700        0.30000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   99.44       99.44             8       12.42963       12.43000
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:24:32, written at 22:26:11
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       99.45       99.46             1       99.45200       99.46000
-------  ----------  ----------  ------------  -------------  -------------
Total         99.45       99.46             2       49.72600       49.73000
-------  ----------  ----------  ------------  -------------  -------------
423 rows written to MOD_QRY.csv
Summary for W/D = 40/1000 , bench_run_statistics_id = 444

Timer Set: Run_One, Constructed at 22 Nov 2016 22:24:32, written at 22:26:11
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           99.45       99.46             1       99.45200       99.46000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         99.45       99.46             2       49.72600       49.73000
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","5021"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  bpgtpaaj7amwr, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","5021"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    422 |00:00:00.30 |     191 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  40000 |    422 |00:00:00.30 |     191 | 31744 | 31744 |28672  (0)|
|   2 |   VIEW                |       |      1 |  40000 |  40000 |00:00:01.71 |     191 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  40000 |  40000 |00:00:01.70 |     191 |  5767K|  2430K| 4466K (0)|
|   4 |     WINDOW SORT       |       |      1 |  40000 |  40000 |00:00:00.02 |     191 |  2037K|   674K| 1810K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:26:11, written at 22:26:12
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch              0.30        0.30             1        0.29600        0.30000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.27        0.26             1        0.26600        0.26000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.58        0.58             8        0.07225        0.07250
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:26:11, written at 22:26:12
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.59        0.60             1        0.59400        0.60000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.59        0.60             2        0.29700        0.30000
-------  ----------  ----------  ------------  -------------  -------------
423 rows written to MOD_QRY_D.csv
Summary for W/D = 40/1000 , bench_run_statistics_id = 445

Timer Set: Run_One, Constructed at 22 Nov 2016 22:26:11, written at 22:26:12
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.61        0.61             1        0.60900        0.61000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.61        0.61             2        0.30450        0.30500
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","7555"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  g1axa6y27m3y3, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","7555"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    422 |00:00:00.02 |     191 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  40000 |    422 |00:00:00.02 |     191 | 48128 | 48128 |43008  (0)|
|   2 |   VIEW                 |       |      1 |  40000 |    422 |00:00:00.03 |     191 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  40000 |    422 |00:00:00.03 |     191 |  2037K|   674K| 1810K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:26:12, written at 22:26:12
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.02        0.01             1        0.01600        0.01000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.28        0.28             1        0.28100        0.28000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.31        0.31             8        0.03913        0.03875
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:26:12, written at 22:26:12
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.33        0.31             1        0.32900        0.31000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.33        0.31             2        0.16450        0.15500
-------  ----------  ----------  ------------  -------------  -------------
423 rows written to MTH_QRY.csv
Summary for W/D = 40/1000 , bench_run_statistics_id = 446

Timer Set: Run_One, Constructed at 22 Nov 2016 22:26:12, written at 22:26:12
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.33        0.31             1        0.32900        0.31000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.33        0.31             2        0.16450        0.15500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","9634"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  3zm1q81tvxpyr, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","9634"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    422 |00:00:23.53 |     252K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     11 |    422 |00:00:23.53 |     252K| 31744 | 31744 |28672  (0)|
|   2 |   VIEW                                       |       |      1 |     11 |  40000 |00:00:23.53 |     252K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     11 |  40000 |00:00:23.52 |     252K|  1895K|   658K| 1684K (0)|
|   4 |     VIEW                                     |       |      1 |     11 |  40000 |00:01:07.27 |     252K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  40000 |00:01:07.26 |     252K|  4096 |  4096 | 2692K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     40 |00:00:00.04 |     191 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  40000 |     40 |00:00:00.04 |     191 |  3029K|   773K| 2692K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  40000 |  40000 |00:00:00.01 |     191 |       |       |          |
|*  9 |       HASH JOIN                              |       |   1000 |     10 |  39960 |00:00:23.13 |     191K|  1214K|  1214K| 1300K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   1000 |        |  40000 |00:00:00.02 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   1000 |  40000 |     40M|00:00:27.67 |     191K|       |       |          |
|  12 |         WINDOW SORT                          |       |   1000 |  40000 |     40M|00:00:22.11 |     191K|  2037K|   674K| 1810K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   1000 |  40000 |     40M|00:00:03.78 |     191K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 22:26:12, written at 22:26:36
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             23.53       23.53             1       23.53300       23.53000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.28        0.28             1        0.28200        0.28000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   23.82       23.81             8        2.97688        2.97625
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:26:12, written at 22:26:36
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       23.83       23.83             1       23.83000       23.83000
-------  ----------  ----------  ------------  -------------  -------------
Total         23.83       23.83             2       11.91500       11.91500
-------  ----------  ----------  ------------  -------------  -------------
423 rows written to RSF_QRY.csv
Summary for W/D = 40/1000 , bench_run_statistics_id = 447

Timer Set: Run_One, Constructed at 22 Nov 2016 22:26:12, written at 22:26:36
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           23.85       23.84             1       23.84600       23.84000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         23.85       23.84             2       11.92300       11.92000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","9740"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  dqdk5s88swg96, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","9740"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    422 |00:00:00.29 |     103K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     76 |    422 |00:00:00.29 |     103K| 31744 | 31744 |28672  (0)|
|   2 |   VIEW                                       |              |      1 |     76 |  40000 |00:00:00.29 |     103K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     76 |  40000 |00:00:00.28 |     103K|  1895K|   658K| 1684K (0)|
|   4 |     VIEW                                     |              |      1 |     76 |  40000 |00:00:00.27 |     103K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  40000 |00:00:00.27 |     103K|  4096 |  4096 | 2692K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     40 |     40 |00:00:00.01 |      42 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     40 |     40 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   1000 |     36 |  39960 |00:00:00.14 |   42363 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   1000 |        |  40000 |00:00:00.01 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  40000 |      1 |  39960 |00:00:00.09 |   42363 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  40000 |    311 |  39960 |00:00:00.04 |    2403 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 22:26:36, written at 22:26:37
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.06        0.06             1        0.06300        0.06000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch              0.28        0.28             1        0.28100        0.28000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.30        0.30             1        0.29700        0.30000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.67        0.68             8        0.08400        0.08500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:26:36, written at 22:26:37
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.69        0.69             1        0.68700        0.69000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.69        0.69             2        0.34350        0.34500
-------  ----------  ----------  ------------  -------------  -------------
423 rows written to RSF_TMP.csv
Summary for W/D = 40/1000 , bench_run_statistics_id = 448

Timer Set: Run_One, Constructed at 22 Nov 2016 22:26:36, written at 22:26:37
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.70        0.71             1        0.70300        0.71000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.70        0.71             2        0.35150        0.35500
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
80000 (2000) records (per category) added, average group size (from) = 146.8 (2000), # of groups = 13.625

Timer Set: Setup, Constructed at 22 Nov 2016 22:26:37, written at 22:26:44
==========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                   7.00        4.22             1        7.00000        4.22000
Gather_Table_Stats        0.17        0.17             1        0.17200        0.17000
GRP_CNT                   0.03        0.03             1        0.03200        0.03000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                     7.20        4.42             4        1.80100        1.10500
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","4025"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  9xrr798ddt4tz, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","4025"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    829 |00:02:10.81 |     317 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  80000 |    829 |00:02:10.81 |     317 | 64512 | 64512 |57344  (0)|
|   2 |   VIEW                |       |      1 |  80000 |  80000 |02:29:27.12 |     317 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |  80000 |  80000 |02:29:27.10 |     317 |    10M|  2393K| 9686K (0)|
|   4 |     WINDOW SORT       |       |      1 |  80000 |  80000 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:26:44, written at 22:33:21
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch            396.54      396.54             1      396.53800      396.54000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.28        0.28             1        0.28100        0.28000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  396.82      396.82             8       49.60238       49.60250
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:26:44, written at 22:33:21
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)      396.84      396.83             1      396.83500      396.83000
-------  ----------  ----------  ------------  -------------  -------------
Total        396.84      396.83             2      198.41750      198.41500
-------  ----------  ----------  ------------  -------------  -------------
830 rows written to MOD_QRY.csv
Summary for W/D = 40/2000 , bench_run_statistics_id = 449

Timer Set: Run_One, Constructed at 22 Nov 2016 22:26:44, written at 22:33:21
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          396.85      396.85             1      396.85100      396.85000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        396.85      396.85             2      198.42550      198.42500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","5614"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  9fr7qrvx1kwkk, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","5614"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |    829 |00:00:00.60 |     317 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |  80000 |    829 |00:00:00.60 |     317 | 64512 | 64512 |57344  (0)|
|   2 |   VIEW                |       |      1 |  80000 |  80000 |00:00:11.63 |     317 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |  80000 |  80000 |00:00:11.61 |     317 |     9M|  2430K| 8432K (0)|
|   4 |     WINDOW SORT       |       |      1 |  80000 |  80000 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:33:21, written at 22:33:22
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.61        0.60             1        0.61000        0.60000
Write to file            0.00        0.01             2        0.00000        0.00500
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.27        0.27             1        0.26500        0.27000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.89        0.89             8        0.11125        0.11125
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:33:21, written at 22:33:22
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.91        0.90             1        0.90600        0.90000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.91        0.90             2        0.45300        0.45000
-------  ----------  ----------  ------------  -------------  -------------
830 rows written to MOD_QRY_D.csv
Summary for W/D = 40/2000 , bench_run_statistics_id = 450

Timer Set: Run_One, Constructed at 22 Nov 2016 22:33:21, written at 22:33:22
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.92        0.92             1        0.92200        0.92000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.92        0.92             2        0.46100        0.46000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","580"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LAS
T (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  g430ufhtu0np6, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","580"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |    829 |00:00:00.04 |     317 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |  80000 |    829 |00:00:00.04 |     317 | 70656 | 70656 |63488  (0)|
|   2 |   VIEW                 |       |      1 |  80000 |    829 |00:00:00.04 |     317 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |  80000 |    829 |00:00:00.04 |     317 |  3880K|   845K| 3448K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:33:22, written at 22:33:22
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.05        0.04             1        0.04700        0.04000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.27        0.27             1        0.26600        0.27000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.33        0.33             8        0.04100        0.04125
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:33:22, written at 22:33:22
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        0.34        0.34             1        0.34300        0.34000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.34        0.34             2        0.17150        0.17000
-------  ----------  ----------  ------------  -------------  -------------
830 rows written to MTH_QRY.csv
Summary for W/D = 40/2000 , bench_run_statistics_id = 451

Timer Set: Run_One, Constructed at 22 Nov 2016 22:33:22, written at 22:33:22
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.36        0.36             1        0.35900        0.36000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.36        0.36             2        0.17950        0.18000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","8497"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  bdd3hwu6wc893, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","8497"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |    829 |00:01:33.66 |     773K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     21 |    829 |00:01:33.66 |     773K| 61440 | 61440 |55296  (0)|
|   2 |   VIEW                                       |       |      1 |     21 |  80000 |00:01:33.66 |     773K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     21 |  80000 |00:01:33.64 |     773K|  3667K|   828K| 3259K (0)|
|   4 |     VIEW                                     |       |      1 |     21 |  80000 |00:04:29.06 |     773K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |  80000 |00:04:29.04 |     773K|  4096 |  4096 | 5338K (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     40 |00:00:00.07 |     317 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |  80000 |     40 |00:00:00.07 |     317 |  6077K|  1001K| 5401K (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |  80000 |  80000 |00:00:00.01 |     317 |       |       |          |
|*  9 |       HASH JOIN                              |       |   2000 |     20 |  79960 |00:01:32.67 |     634K|  1214K|  1214K| 1296K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   2000 |        |  80000 |00:00:00.04 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   2000 |  80000 |    160M|00:01:50.32 |     634K|       |       |          |
|  12 |         WINDOW SORT                          |       |   2000 |  80000 |    160M|00:01:28.25 |     634K|  3880K|   845K| 3448K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   2000 |  80000 |    160M|00:00:15.26 |     634K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 22:33:22, written at 22:34:56
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch             93.65       93.64             1       93.65100       93.64000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.30        0.29             1        0.29700        0.29000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                   93.96       93.95             8       11.74550       11.74375
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:33:22, written at 22:34:56
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)       93.98       93.97             1       93.98000       93.97000
-------  ----------  ----------  ------------  -------------  -------------
Total         93.98       93.97             2       46.99000       46.98500
-------  ----------  ----------  ------------  -------------  -------------
830 rows written to RSF_QRY.csv
Summary for W/D = 40/2000 , bench_run_statistics_id = 452

Timer Set: Run_One, Constructed at 22 Nov 2016 22:33:22, written at 22:34:56
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run           93.98       93.97             1       93.98000       93.97000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total         93.98       93.97             2       46.99000       46.98500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","6813"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  0pt42v6jyt84g, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","6813"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |    829 |00:00:00.60 |     223K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     92 |    829 |00:00:00.60 |     223K| 61440 | 61440 |55296  (0)|
|   2 |   VIEW                                       |              |      1 |     92 |  80000 |00:00:00.59 |     223K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     92 |  80000 |00:00:00.58 |     223K|  3667K|   828K| 3259K (0)|
|   4 |     VIEW                                     |              |      1 |     92 |  80000 |00:00:00.57 |     223K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |  80000 |00:00:00.56 |     223K|  4096 |  4096 | 5338K (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     40 |     40 |00:00:00.01 |      42 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     40 |     40 |00:00:00.01 |       2 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   2000 |     52 |  79960 |00:00:00.28 |   84799 |       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   2000 |        |  80000 |00:00:00.02 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |  80000 |      1 |  79960 |00:00:00.19 |   84799 |       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |  80000 |    968 |  79960 |00:00:00.08 |    4839 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 22:34:56, written at 22:34:57
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.13        0.12             1        0.12500        0.12000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch              0.59        0.59             1        0.59300        0.59000
Write to file            0.00        0.00             2        0.00000        0.00000
Remaining fetches        0.00        0.00             1        0.00000        0.00000
Write plan               0.30        0.30             1        0.29700        0.30000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    1.05        1.05             8        0.13088        0.13125
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:34:56, written at 22:34:57
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             1        0.00000        0.00000
(Other)        1.06        1.07             1        1.06300        1.07000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.06        1.07             2        0.53150        0.53500
-------  ----------  ----------  ------------  -------------  -------------
830 rows written to RSF_TMP.csv
Summary for W/D = 40/2000 , bench_run_statistics_id = 453

Timer Set: Run_One, Constructed at 22 Nov 2016 22:34:56, written at 22:34:57
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            1.08        1.08             1        1.07900        1.08000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.08        1.08             2        0.53950        0.54000
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
160000 (4000) records (per category) added, average group size (from) = 129.2 (4000), # of groups = 30.95

Timer Set: Setup, Constructed at 22 Nov 2016 22:34:57, written at 22:35:09
==========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                  11.50        8.49             1       11.50100        8.49000
Gather_Table_Stats        0.31        0.31             1        0.31200        0.31000
GRP_CNT                   0.06        0.06             1        0.06300        0.06000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                    11.88        8.86             4        2.96900        2.21500
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","6404"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  1csk09zpvjfkm, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","6404"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   1625 |00:23:09.92 |     569 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    160K|   1625 |00:23:09.92 |     569 |   124K|   124K|  110K (0)|
|   2 |   VIEW                |       |      1 |    160K|    160K|04:20:03.92 |     569 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |    160K|    160K|04:20:03.90 |     569 |    20M|  4787K|   17M (0)|
|   4 |     WINDOW SORT       |       |      1 |    160K|    160K|00:00:00.09 |     569 |  7707K|  1099K| 6850K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    160K|    160K|00:00:00.01 |     569 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:35:09, written at 22:58:19
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch          1,389.92    1,389.86             1    1,389.92100    1,389.86000
Write to file            0.00        0.00             3        0.00000        0.00000
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.30        0.29             1        0.29700        0.29000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                1,390.22    1,390.15            10      139.02180      139.01500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:35:09, written at 22:58:19
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)    1,390.23    1,390.17             1    1,390.23300    1,390.17000
-------  ----------  ----------  ------------  -------------  -------------
Total      1,390.23    1,390.17             3      463.41100      463.39000
-------  ----------  ----------  ------------  -------------  -------------
1626 rows written to MOD_QRY.csv
Summary for W/D = 40/4000 , bench_run_statistics_id = 454

Timer Set: Run_One, Constructed at 22 Nov 2016 22:35:09, written at 22:58:19
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run        1,390.23    1,390.17             1    1,390.23300    1,390.17000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total      1,390.23    1,390.17             2      695.11650      695.08500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","8480"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  1cccz41scjnmm, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","8480"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   1625 |00:00:01.20 |     569 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    160K|   1625 |00:00:01.20 |     569 |   124K|   124K|  110K (0)|
|   2 |   VIEW                |       |      1 |    160K|    160K|00:00:16.50 |     569 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |    160K|    160K|00:00:16.47 |     569 |    18M|  2430K|   15M (0)|
|   4 |     WINDOW SORT       |       |      1 |    160K|    160K|00:00:00.09 |     569 |  7707K|  1099K| 6850K (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    160K|    160K|00:00:00.01 |     569 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:58:19, written at 22:58:21
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              1.19        1.19             1        1.18800        1.19000
Write to file            0.02        0.01             3        0.00533        0.00333
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.27        0.27             1        0.26500        0.27000
(Other)                  0.02        0.02             1        0.01500        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    1.48        1.49            10        0.14840        0.14900
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:58:19, written at 22:58:21
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.02        0.01             2        0.00800        0.00500
(Other)        1.48        1.49             1        1.48400        1.49000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.50        1.50             3        0.50000        0.50000
-------  ----------  ----------  ------------  -------------  -------------
1626 rows written to MOD_QRY_D.csv
Summary for W/D = 40/4000 , bench_run_statistics_id = 455

Timer Set: Run_One, Constructed at 22 Nov 2016 22:58:19, written at 22:58:21
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            1.50        1.50             1        1.50000        1.50000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.50        1.50             2        0.75000        0.75000
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","8182"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  258a02qk58aty, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","8182"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |   1625 |00:00:00.09 |     569 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |    160K|   1625 |00:00:00.09 |     569 |   124K|   124K|  110K (0)|
|   2 |   VIEW                 |       |      1 |    160K|   1625 |00:00:00.09 |     569 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |    160K|   1625 |00:00:00.09 |     569 |  7707K|  1099K| 6850K (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |    160K|    160K|00:00:00.01 |     569 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 22:58:21, written at 22:58:21
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.08        0.07             1        0.07800        0.07000
Write to file            0.00        0.00             3        0.00000        0.00000
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.28        0.29             1        0.28200        0.29000
(Other)                  0.02        0.02             1        0.01600        0.02000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.38        0.38            10        0.03760        0.03800
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:58:21, written at 22:58:21
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)        0.39        0.38             1        0.39100        0.38000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.39        0.38             3        0.13033        0.12667
-------  ----------  ----------  ------------  -------------  -------------
1626 rows written to MTH_QRY.csv
Summary for W/D = 40/4000 , bench_run_statistics_id = 456

Timer Set: Run_One, Constructed at 22 Nov 2016 22:58:21, written at 22:58:21
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.39        0.38             1        0.39100        0.38000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.39        0.38             2        0.19550        0.19000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","9263"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  a9s9a98bvj9uj, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","9263"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |   1625 |00:06:17.27 |    2575K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     41 |   1625 |00:06:17.27 |    2575K|   124K|   124K|  110K (0)|
|   2 |   VIEW                                       |       |      1 |     41 |    160K|00:06:17.27 |    2575K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     41 |    160K|00:06:17.25 |    2575K|  7211K|  1071K| 6409K (0)|
|   4 |     VIEW                                     |       |      1 |     41 |    160K|00:18:11.40 |    2575K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |    160K|00:18:11.35 |    2575K|  4096 |  4096 |   10M (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     40 |00:00:00.16 |     569 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |    160K|     40 |00:00:00.16 |     569 |    11M|  1321K|   10M (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |    160K|    160K|00:00:00.02 |     569 |       |       |          |
|*  9 |       HASH JOIN                              |       |   4000 |     40 |    159K|00:06:14.75 |    2276K|  1214K|  1214K| 1284K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   4000 |        |    160K|00:00:00.11 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   4000 |    160K|    640M|00:07:28.41 |    2276K|       |       |          |
|  12 |         WINDOW SORT                          |       |   4000 |    160K|    640M|00:05:59.99 |    2276K|  7707K|  1099K| 6850K (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   4000 |    160K|    640M|00:00:59.66 |    2276K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 22 Nov 2016 22:58:21, written at 23:04:39
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch            377.26      377.23             1      377.26200      377.23000
Write to file            0.02        0.02             3        0.00500        0.00667
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.28        0.28             1        0.28200        0.28000
(Other)                  0.00        0.00             1        0.00000        0.00000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                  377.58      377.55            10       37.75750       37.75500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 22:58:21, written at 23:04:39
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.02        0.02             2        0.00750        0.01000
(Other)      377.58      377.54             1      377.57500      377.54000
-------  ----------  ----------  ------------  -------------  -------------
Total        377.59      377.56             3      125.86333      125.85333
-------  ----------  ----------  ------------  -------------  -------------
1626 rows written to RSF_QRY.csv
Summary for W/D = 40/4000 , bench_run_statistics_id = 457

Timer Set: Run_One, Constructed at 22 Nov 2016 22:58:21, written at 23:04:39
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run          377.59      377.56             1      377.59000      377.56000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total        377.59      377.56             2      188.79500      188.78000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","1971"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  6w60jnuvzn484, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","1971"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |   1625 |00:00:01.24 |     471K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     94 |   1625 |00:00:01.24 |     471K|   124K|   124K|  110K (0)|
|   2 |   VIEW                                       |              |      1 |     94 |    160K|00:00:01.24 |     471K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     94 |    160K|00:00:01.21 |     471K|  7211K|  1071K| 6409K (0)|
|   4 |     VIEW                                     |              |      1 |     94 |    160K|00:00:01.23 |     471K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |    160K|00:00:01.20 |     471K|  4096 |  4096 |   10M (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     40 |     40 |00:00:00.01 |      43 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     40 |     40 |00:00:00.01 |       3 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   4000 |     54 |    159K|00:00:00.57 |     172K|       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   4000 |        |    160K|00:00:00.03 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |    160K|      1 |    159K|00:00:00.38 |     172K|       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |    160K|   1819 |    159K|00:00:00.16 |   13031 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 22 Nov 2016 23:04:39, written at 23:04:41
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.27        0.27             1        0.26500        0.27000
Open cursor              0.02        0.02             1        0.01600        0.02000
First fetch              1.25        1.25             1        1.25000        1.25000
Write to file            0.00        0.00             3        0.00000        0.00000
Remaining fetches        0.00        0.00             2        0.00000        0.00000
Write plan               0.30        0.29             1        0.29700        0.29000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    1.84        1.84            10        0.18440        0.18400
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 23:04:39, written at 23:04:41
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)        1.88        1.86             1        1.87500        1.86000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.88        1.86             3        0.62500        0.62000
-------  ----------  ----------  ------------  -------------  -------------
1626 rows written to RSF_TMP.csv
Summary for W/D = 40/4000 , bench_run_statistics_id = 458

Timer Set: Run_One, Constructed at 22 Nov 2016 23:04:39, written at 23:04:41
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            1.89        1.87             1        1.89100        1.87000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          1.89        1.87             2        0.94550        0.93500
-------  ----------  ----------  ------------  -------------  -------------
Items truncated
320000 (8000) records (per category) added, average group size (from) = 124.2 (8000), # of groups = 64.425

Timer Set: Setup, Constructed at 22 Nov 2016 23:04:41, written at 23:05:08
==========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                  Elapsed         CPU         Calls       Ela/Call       CPU/Call
------------------  ----------  ----------  ------------  -------------  -------------
Add_Itm                  26.77       16.96             1       26.76900       16.96000
Gather_Table_Stats        0.63        0.62             1        0.62500        0.62000
GRP_CNT                   0.13        0.13             1        0.12500        0.13000
(Other)                   0.00        0.00             1        0.00000        0.00000
------------------  ----------  ----------  ------------  -------------  -------------
Total                    27.52       17.71             4        6.87975        4.42750
------------------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURE
S (id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, fin
al_grp[ANY] = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_
grp || '","' || COUNT(*) || '","817"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  2ytj4xgt4v9s4, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","817"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:21:10.69 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:21:10.69 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|55:38:12.41 |    1074 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |    320K|    320K|55:38:12.36 |    1074 |    38M|  4773K|   32M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.19 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 22 Nov 2016 23:05:08, written at 00:37:54
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch          5,565.65    5,565.41             1    5,565.65400    5,565.41000
Write to file            0.00        0.00             5        0.00000        0.00000
Remaining fetches        0.00        0.00             4        0.00000        0.00000
Write plan               0.30        0.30             1        0.29700        0.30000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                5,565.97    5,565.72            14      397.56900      397.55143
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 22 Nov 2016 23:05:08, written at 00:37:54
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             3        0.00000        0.00000
(Other)    5,565.98    5,565.73             1    5,565.98100    5,565.73000
-------  ----------  ----------  ------------  -------------  -------------
Total      5,565.98    5,565.73             4    1,391.49525    1,391.43250
-------  ----------  ----------  ------------  -------------  -------------
3230 rows written to MOD_QRY.csv
Summary for W/D = 40/8000 , bench_run_statistics_id = 459

Timer Set: Run_One, Constructed at 22 Nov 2016 23:05:08, written at 00:37:54
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run        5,566.00    5,565.75             1    5,565.99700    5,565.75000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total      5,566.00    5,565.75             2    2,782.99850    2,782.87500
-------  ----------  ----------  ------------  -------------  -------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight, sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY (Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASU
RES (id, weight, weight sub_weight, id final_grp, seq) RULES ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY] OR
DER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || fin
al_grp || '","' || COUNT(*) || '","9807"' FROM all_rows GROUP BY cat, final_grp ORDER BY cat, final_grp

SQL_ID  2ws6cb6spn1tm, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","9807"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:00:02.43 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:00:02.43 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|00:01:32.47 |    1074 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |    320K|    320K|00:01:32.42 |    1074 |    36M|  4844K|   29M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.18 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 23 Nov 2016 00:37:54, written at 00:37:57
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              2.42        2.42             1        2.42200        2.42000
Write to file            0.02        0.02             5        0.00300        0.00400
Remaining fetches        0.00        0.00             4        0.00000        0.00000
Write plan               0.28        0.28             1        0.28200        0.28000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    2.74        2.73            14        0.19536        0.19500
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 23 Nov 2016 00:37:54, written at 00:37:57
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             4        0.00000        0.00000
(Other)        2.77        2.73             1        2.76600        2.73000
-------  ----------  ----------  ------------  -------------  -------------
Total          2.77        2.73             5        0.55320        0.54600
-------  ----------  ----------  ------------  -------------  -------------
3230 rows written to MOD_QRY_D.csv
Summary for W/D = 40/8000 , bench_run_statistics_id = 460

Timer Set: Run_One, Constructed at 23 Nov 2016 00:37:54, written at 00:37:57
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            2.78        2.75             1        2.78200        2.75000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          2.78        2.75             2        1.39100        1.37500
-------  ----------  ----------  ------------  -------------  -------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || num_rows || '","7787"' FROM items MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL LA
ST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s* t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m ORDER BY cat, final_grp

SQL_ID  3h9qsj5tyf2ah, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","7787"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |   3229 |00:00:00.17 |    1074 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                 |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |    320K|   3229 |00:00:00.17 |    1074 |    15M|  1460K|   13M (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
---------------------------------------------------------------------------------------------------------------------


Timer Set: Cursor, Constructed at 23 Nov 2016 00:37:57, written at 00:37:58
===========================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch              0.17        0.17             1        0.17200        0.17000
Write to file            0.02        0.02             5        0.00320        0.00400
Remaining fetches        0.00        0.00             4        0.00000        0.00000
Write plan               0.27        0.27             1        0.26500        0.27000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    0.47        0.47            14        0.03343        0.03357
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 23 Nov 2016 00:37:57, written at 00:37:58
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.02        0.02             4        0.00400        0.00500
(Other)        0.47        0.46             1        0.46800        0.46000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.48        0.48             5        0.09680        0.09600
-------  ----------  ----------  ------------  -------------  -------------
3230 rows written to MTH_QRY.csv
Summary for W/D = 40/8000 , bench_run_statistics_id = 461

Timer Set: Run_One, Constructed at 23 Nov 2016 00:37:57, written at 00:37:58
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            0.50        0.50             1        0.50000        0.50000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          0.50        0.50             2        0.25000        0.25000
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat
, rn, seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id, itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_
num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, g
rp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","5736"' FROM final_grouping GROUP BY cat, final_grp ORDER BY
cat, final_grp

SQL_ID  94y37zwgjs9ug, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","5736"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |   3229 |00:08:50.80 |    9365K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     81 |   3229 |00:08:50.80 |    9365K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |       |      1 |     81 |    320K|00:08:50.80 |    9365K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     81 |    320K|00:08:50.75 |    9365K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |       |      1 |     81 |    320K|01:13:10.25 |    9365K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |    320K|01:13:10.14 |    9365K|  4096 |  4096 |   20M (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     40 |00:00:00.34 |    1074 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |    320K|     40 |00:00:00.34 |    1074 |    23M|  1772K|   20M (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |    320K|    320K|00:00:00.04 |    1074 |       |       |          |
|*  9 |       HASH JOIN                              |       |   8000 |     80 |    319K|00:25:04.02 |    8592K|  1214K|  1214K| 1283K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   8000 |        |    320K|00:00:00.19 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   8000 |    320K|   2560M|00:30:26.18 |    8592K|       |       |          |
|  12 |         WINDOW SORT                          |       |   8000 |    320K|   2560M|00:24:31.69 |    8592K|    15M|  1460K|   13M (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   8000 |    320K|   2560M|00:04:01.43 |    8592K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")


Timer Set: Cursor, Constructed at 23 Nov 2016 00:37:58, written at 01:03:11
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.00        0.00             1        0.00000        0.00000
Open cursor              0.00        0.00             1        0.00000        0.00000
First fetch          1,512.88    1,512.85             1    1,512.88000    1,512.85000
Write to file            0.02        0.01             5        0.00320        0.00200
Remaining fetches        0.00        0.00             4        0.00000        0.00000
Write plan               0.30        0.30             1        0.29700        0.30000
(Other)                  0.02        0.01             1        0.01500        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                1,513.21    1,513.17            14      108.08629      108.08357
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 23 Nov 2016 00:37:58, written at 01:03:11
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.02        0.01             4        0.00400        0.00250
(Other)    1,513.21    1,513.16             1    1,513.20700    1,513.16000
-------  ----------  ----------  ------------  -------------  -------------
Total      1,513.22    1,513.17             5      302.64460      302.63400
-------  ----------  ----------  ------------  -------------  -------------
3230 rows written to RSF_QRY.csv
Summary for W/D = 40/8000 , bench_run_statistics_id = 462

Timer Set: Run_One, Constructed at 23 Nov 2016 00:37:58, written at 01:03:11
============================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run        1,513.22    1,513.17             1    1,513.22300    1,513.17000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total      1,513.22    1,513.17             2      756.61150      756.58500
-------  ----------  ----------  ------------  -------------  -------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items
_tmp_n1) */ itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num + CASE WHEN rsq.sub_weight >= 5000 THEN 1 EL
SE 0 END FROM rsq JOIN items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq) final_grp
 FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' || COUNT(*) || '","8326"' FROM final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

INSERT INTO items_tmp SELECT id, cat, seq, weight, Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) FROM items
SQL_ID  3u062brw9anr9, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","8326"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |   3229 |00:00:02.69 |    1118K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     91 |   3229 |00:00:02.69 |    1118K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |              |      1 |     91 |    320K|00:00:02.69 |    1118K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     91 |    320K|00:00:02.63 |    1118K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |              |      1 |     91 |    320K|00:00:02.73 |    1118K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |    320K|00:00:02.65 |    1118K|  4096 |  4096 |   20M (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     40 |     40 |00:00:00.01 |      43 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     40 |     40 |00:00:00.01 |       3 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   8000 |     51 |    319K|00:00:01.15 |     346K|       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   8000 |        |    320K|00:00:00.07 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |    320K|      1 |    319K|00:00:00.78 |     346K|       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |    320K|   3191 |    319K|00:00:00.31 |   26059 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Timer Set: Cursor, Constructed at 23 Nov 2016 01:03:11, written at 01:03:15
===========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer                 Elapsed         CPU         Calls       Ela/Call       CPU/Call
-----------------  ----------  ----------  ------------  -------------  -------------
Pre SQL                  0.78        0.57             1        0.78100        0.57000
Open cursor              0.02        0.01             1        0.01600        0.01000
First fetch              2.69        2.69             1        2.68800        2.69000
Write to file            0.00        0.00             5        0.00000        0.00000
Remaining fetches        0.00        0.00             4        0.00000        0.00000
Write plan               0.31        0.31             1        0.31200        0.31000
(Other)                  0.02        0.01             1        0.01600        0.01000
-----------------  ----------  ----------  ------------  -------------  -------------
Total                    3.81        3.59            14        0.27236        0.25643
-----------------  ----------  ----------  ------------  -------------  -------------

Timer Set: File Writer, Constructed at 23 Nov 2016 01:03:11, written at 01:03:15
================================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             4        0.00000        0.00000
(Other)        3.83        3.59             1        3.82900        3.59000
-------  ----------  ----------  ------------  -------------  -------------
Total          3.83        3.59             5        0.76580        0.71800
-------  ----------  ----------  ------------  -------------  -------------
3230 rows written to RSF_TMP.csv
Summary for W/D = 40/8000 , bench_run_statistics_id = 463

Timer Set: Run_One, Constructed at 23 Nov 2016 01:03:11, written at 01:03:15
============================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Run            3.83        3.59             1        3.82900        3.59000
(Other)        0.00        0.00             1        0.00000        0.00000
-------  ----------  ----------  ------------  -------------  -------------
Total          3.83        3.59             2        1.91450        1.79500
-------  ----------  ----------  ------------  -------------  -------------

Distinct Plans
==============
MOD_QRY: 3/4 (1 of 1)
SQL_ID  2ytj4xgt4v9s4, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","817"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:21:10.69 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:21:10.69 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|55:38:12.41 |    1074 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |    320K|    320K|55:38:12.36 |    1074 |    38M|  4773K|   32M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.19 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------

MOD_QRY_D: 3/4 (1 of 1)
SQL_ID  2ws6cb6spn1tm, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","9807"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:00:02.43 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:00:02.43 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|00:01:32.47 |    1074 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |    320K|    320K|00:01:32.42 |    1074 |    36M|  4844K|   29M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.18 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------

MTH_QRY: 3/4 (1 of 1)
SQL_ID  3h9qsj5tyf2ah, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","7787"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |   3229 |00:00:00.17 |    1074 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                 |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |    320K|   3229 |00:00:00.17 |    1074 |    15M|  1460K|   13M (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
---------------------------------------------------------------------------------------------------------------------

RSF_QRY: 3/4 (1 of 1)
SQL_ID  94y37zwgjs9ug, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","5736"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |   3229 |00:08:50.80 |    9365K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     81 |   3229 |00:08:50.80 |    9365K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |       |      1 |     81 |    320K|00:08:50.80 |    9365K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     81 |    320K|00:08:50.75 |    9365K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |       |      1 |     81 |    320K|01:13:10.25 |    9365K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |    320K|01:13:10.14 |    9365K|  4096 |  4096 |   20M (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     40 |00:00:00.34 |    1074 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |    320K|     40 |00:00:00.34 |    1074 |    23M|  1772K|   20M (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |    320K|    320K|00:00:00.04 |    1074 |       |       |          |
|*  9 |       HASH JOIN                              |       |   8000 |     80 |    319K|00:25:04.02 |    8592K|  1214K|  1214K| 1283K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   8000 |        |    320K|00:00:00.19 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   8000 |    320K|   2560M|00:30:26.18 |    8592K|       |       |          |
|  12 |         WINDOW SORT                          |       |   8000 |    320K|   2560M|00:24:31.69 |    8592K|    15M|  1460K|   13M (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   8000 |    320K|   2560M|00:04:01.43 |    8592K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

RSF_TMP: 3/4 (1 of 1)
SQL_ID  3u062brw9anr9, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","8326"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |   3229 |00:00:02.69 |    1118K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     91 |   3229 |00:00:02.69 |    1118K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |              |      1 |     91 |    320K|00:00:02.69 |    1118K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     91 |    320K|00:00:02.63 |    1118K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |              |      1 |     91 |    320K|00:00:02.73 |    1118K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |    320K|00:00:02.65 |    1118K|  4096 |  4096 |   20M (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     40 |     40 |00:00:00.01 |      43 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     40 |     40 |00:00:00.01 |       3 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   8000 |     51 |    319K|00:00:01.15 |     346K|       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   8000 |        |    320K|00:00:00.07 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |    320K|      1 |    319K|00:00:00.78 |     346K|       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |    320K|   3191 |    319K|00:00:00.31 |   26059 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Data Points
===========
Data Point:               size_wide      size_deep       cpu_time        elapsed       num_recs       per_part     group_size
Data Point                       10           1000            .66           .797          10000           1000            116
Data Point                       10           2000           1.14           1.25          20000           2000            112
Data Point                       10           4000           2.24          2.485          40000           4000            108
Data Point                       10           8000           4.37          4.563          80000           8000            105
Data Point                       20           1000           1.16          1.266          20000           1000            132
Data Point                       20           2000           2.25          2.265          40000           2000            121
Data Point                       20           4000           4.45          6.001          80000           4000            113
Data Point                       20           8000           8.81         10.517         160000           8000            112
Data Point                       40           1000           2.31          2.532          40000           1000            156
Data Point                       40           2000           4.43          7.219          80000           2000            147
Data Point                       40           4000           8.88         11.892         160000           4000            129
Data Point                       40           8000          17.71         27.519         320000           8000            124

num_records_out
===============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10            105            205            406            808
MOD_QRY                         W20            209            411            815           1618
MOD_QRY                         W40            422            829           1625           3229
MOD_QRY_D                       W10            105            205            406            808
MOD_QRY_D                       W20            209            411            815           1618
MOD_QRY_D                       W40            422            829           1625           3229
MTH_QRY                         W10            105            205            406            808
MTH_QRY                         W20            209            411            815           1618
MTH_QRY                         W40            422            829           1625           3229
RSF_QRY                         W10            105            205            406            808
RSF_QRY                         W20            209            411            815           1618
RSF_QRY                         W40            422            829           1625           3229
RSF_TMP                         W10            105            205            406            808
RSF_TMP                         W20            209            411            815           1618
RSF_TMP                         W40            422            829           1625           3229

num_records_out_SLICE
=====================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                         422            829           1625           3229
MOD_QRY_D                       422            829           1625           3229
MTH_QRY                         422            829           1625           3229
RSF_QRY                         422            829           1625           3229
RSF_TMP                         422            829           1625           3229

num_records_out_RATIO
=====================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              1              1              1              1
MOD_QRY                         W20              1              1              1              1
MOD_QRY                         W40              1              1              1              1
MOD_QRY_D                       W10              1              1              1              1
MOD_QRY_D                       W20              1              1              1              1
MOD_QRY_D                       W40              1              1              1              1
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10              1              1              1              1
RSF_QRY                         W20              1              1              1              1
RSF_QRY                         W40              1              1              1              1
RSF_TMP                         W10              1              1              1              1
RSF_TMP                         W20              1              1              1              1
RSF_TMP                         W40              1              1              1              1

num_records_out_SLICE_RATIO
===========================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           1              1              1              1
MOD_QRY_D                         1              1              1              1
MTH_QRY                           1              1              1              1
RSF_QRY                           1              1              1              1
RSF_TMP                           1              1              1              1

cpu_time
========
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10             16           61.5         243.04         961.72
MOD_QRY                         W20          47.25          189.5         761.91        2082.06
MOD_QRY                         W40          99.14         396.54        1389.86        5565.41
MOD_QRY_D                       W10            .08            .16            .29            .59
MOD_QRY_D                       W20            .15             .3            .59           1.21
MOD_QRY_D                       W40            .32             .6           1.19           2.42
MTH_QRY                         W10              0            .01            .02            .05
MTH_QRY                         W20            .01            .01            .04             .1
MTH_QRY                         W40            .01            .04            .07            .17
RSF_QRY                         W10           5.89          23.15          92.19          368.7
RSF_QRY                         W20          11.63          45.99         184.83         749.77
RSF_QRY                         W40          23.53          93.64         377.25        1512.85
RSF_TMP                         W10             .1            .19            .39            .76
RSF_TMP                         W20            .19            .37            .76           1.54
RSF_TMP                         W40            .36            .73           1.54           3.27

cpu_time_SLICE
==============
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       99.14         396.54        1389.86        5565.41
MOD_QRY_D                       .32             .6           1.19           2.42
MTH_QRY                         .01            .04            .07            .17
RSF_QRY                       23.53          93.64         377.25        1512.85
RSF_TMP                         .36            .73           1.54           3.27

cpu_time_RATIO
==============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10       16000000           6150          12152        19234.4
MOD_QRY                         W20           4725          18950       19047.75        20820.6
MOD_QRY                         W40           9914         9913.5       19855.14       32737.71
MOD_QRY_D                       W10          80000             16           14.5           11.8
MOD_QRY_D                       W20             15             30          14.75           12.1
MOD_QRY_D                       W40             32             15             17          14.24
MTH_QRY                         W10              0              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10        5890000           2315         4609.5           7374
RSF_QRY                         W20           1163           4599        4620.75         7497.7
RSF_QRY                         W40           2353           2341        5389.29        8899.12
RSF_TMP                         W10         100000             19           19.5           15.2
RSF_TMP                         W20             19             37             19           15.4
RSF_TMP                         W40             36          18.25             22          19.24

cpu_time_SLICE_RATIO
====================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                        9914         9913.5       19855.14       32737.71
MOD_QRY_D                        32             15             17          14.24
MTH_QRY                           1              1              1              1
RSF_QRY                        2353           2341        5389.29        8899.12
RSF_TMP                          36          18.25             22          19.24

elapsed_time
============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10         16.002         61.506         243.07        961.818
MOD_QRY                         W20         47.257        189.504        761.983       2082.192
MOD_QRY                         W40          99.14        396.538       1389.921       5565.654
MOD_QRY_D                       W10           .078           .156           .297           .594
MOD_QRY_D                       W20           .157           .298           .594          1.203
MOD_QRY_D                       W40           .312            .61          1.188          2.422
MTH_QRY                         W10              0           .016           .016           .047
MTH_QRY                         W20           .016           .016           .031           .094
MTH_QRY                         W40           .016           .047           .078           .172
RSF_QRY                         W10          5.891         23.159         92.182        368.731
RSF_QRY                         W20         11.626         45.973        184.832        749.806
RSF_QRY                         W40         23.533         93.651        377.278        1512.88
RSF_TMP                         W10           .094           .188           .391           .766
RSF_TMP                         W20           .188           .375           .766          1.547
RSF_TMP                         W40            .36           .734          1.531          3.485

elapsed_time_SLICE
==================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       99.14        396.538       1389.921       5565.654
MOD_QRY_D                      .312            .61          1.188          2.422
MTH_QRY                        .016           .047           .078           .172
RSF_QRY                      23.533         93.651        377.278        1512.88
RSF_TMP                         .36           .734          1.531          3.485

elapsed_time_RATIO
==================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10       16002000        3844.13       15191.88       20464.21
MOD_QRY                         W20        2953.56          11844        24580.1       22150.98
MOD_QRY                         W40        6196.25        8436.98        17819.5       32358.45
MOD_QRY_D                       W10          78000           9.75          18.56          12.64
MOD_QRY_D                       W20           9.81          18.63          19.16           12.8
MOD_QRY_D                       W40           19.5          12.98          15.23          14.08
MTH_QRY                         W10              0              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10        5891000        1447.44        5761.38        7845.34
RSF_QRY                         W20         726.63        2873.31        5962.32        7976.66
RSF_QRY                         W40        1470.81        1992.57         4836.9        8795.81
RSF_TMP                         W10          94000          11.75          24.44           16.3
RSF_TMP                         W20          11.75          23.44          24.71          16.46
RSF_TMP                         W40           22.5          15.62          19.63          20.26

elapsed_time_SLICE_RATIO
========================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                     6196.25        8436.98        17819.5       32358.45
MOD_QRY_D                      19.5          12.98          15.23          14.08
MTH_QRY                           1              1              1              1
RSF_QRY                     1470.81        1992.57         4836.9        8795.81
RSF_TMP                        22.5          15.62          19.63          20.26

memory_used
===========
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10        1735680        3250176        5727232        9653248
MOD_QRY                         W20        3708928        5952512       10167296       19100672
MOD_QRY                         W40        5314560        9918464       18241536       34169856
MOD_QRY_D                       W10        1371136        2521088        4744192        8128512
MOD_QRY_D                       W20        2531328        4429824        8124416       16745472
MOD_QRY_D                       W40        4573184        8634368       16484352       30871552
MTH_QRY                         W10         563200         950272        1788928        3530752
MTH_QRY                         W20         950272        1853440        3530752        6949888
MTH_QRY                         W40        1853440        3530752        7014400       13981696
RSF_QRY                         W10         913408        1401856        2756608        5530624
RSF_QRY                         W20        1401856        2756608        5530624       11014144
RSF_QRY                         W40        2756608        5530624       11014144       21916672
RSF_TMP                         W10         692224        1401856        2756608        5401600
RSF_TMP                         W20        1401856        2756608        5466112       10885120
RSF_TMP                         W40        2756608        5466112       10949632       21852160

memory_used_SLICE
=================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                     5314560        9918464       18241536       34169856
MOD_QRY_D                   4573184        8634368       16484352       30871552
MTH_QRY                     1853440        3530752        7014400       13981696
RSF_QRY                     2756608        5530624       11014144       21916672
RSF_TMP                     2756608        5466112       10949632       21852160

memory_used_RATIO
=================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           3.08           3.42            3.2           2.73
MOD_QRY                         W20            3.9           3.21           2.88           2.75
MOD_QRY                         W40           2.87           2.81            2.6           2.44
MOD_QRY_D                       W10           2.43           2.65           2.65            2.3
MOD_QRY_D                       W20           2.66           2.39            2.3           2.41
MOD_QRY_D                       W40           2.47           2.45           2.35           2.21
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10           1.62           1.48           1.54           1.57
RSF_QRY                         W20           1.48           1.49           1.57           1.58
RSF_QRY                         W40           1.49           1.57           1.57           1.57
RSF_TMP                         W10           1.23           1.48           1.54           1.53
RSF_TMP                         W20           1.48           1.49           1.55           1.57
RSF_TMP                         W40           1.49           1.55           1.56           1.56

memory_used_SLICE_RATIO
=======================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                        2.87           2.81            2.6           2.44
MOD_QRY_D                      2.47           2.45           2.35           2.21
MTH_QRY                           1              1              1              1
RSF_QRY                        1.49           1.57           1.57           1.57
RSF_TMP                        1.49           1.55           1.56           1.56

buffers
=======
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10             38             68            175            317
MOD_QRY                         W20             68            191            317            569
MOD_QRY                         W40            191            317            569           1074
MOD_QRY_D                       W10             38             68            175            317
MOD_QRY_D                       W20             68            191            317            569
MOD_QRY_D                       W40            191            317            569           1074
MTH_QRY                         W10             38             68            175            317
MTH_QRY                         W20             68            191            317            569
MTH_QRY                         W40            191            317            569           1074
RSF_QRY                         W10          45370         159913         761195        2675218
RSF_QRY                         W20          91913         443211        1407218        4851116
RSF_QRY                         W40         252211         773218        2575116        9365407
RSF_TMP                         W10          18689          46582         106491         229838
RSF_TMP                         W20          45554         104461         225778         475661
RSF_TMP                         W40         103425         223742         471581        1118395

buffers_SLICE
=============
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                         191            317            569           1074
MOD_QRY_D                       191            317            569           1074
MTH_QRY                         191            317            569           1074
RSF_QRY                      252211         773218        2575116        9365407
RSF_TMP                      103425         223742         471581        1118395

buffers_RATIO
=============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              1              1              1              1
MOD_QRY                         W20              1              1              1              1
MOD_QRY                         W40              1              1              1              1
MOD_QRY_D                       W10              1              1              1              1
MOD_QRY_D                       W20              1              1              1              1
MOD_QRY_D                       W40              1              1              1              1
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10        1193.95        2351.66        4349.69        8439.17
RSF_QRY                         W20        1351.66        2320.48        4439.17        8525.69
RSF_QRY                         W40        1320.48        2439.17        4525.69        8720.12
RSF_TMP                         W10         491.82         685.03         608.52         725.04
RSF_TMP                         W20         669.91         546.92         712.23         835.96
RSF_TMP                         W40         541.49         705.81         828.79        1041.34

buffers_SLICE_RATIO
===================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           1              1              1              1
MOD_QRY_D                         1              1              1              1
MTH_QRY                           1              1              1              1
RSF_QRY                     1320.48        2439.17        4525.69        8720.12
RSF_TMP                      541.49         705.81         828.79        1041.34

disk_reads
==========
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              0              0              0              0
MOD_QRY                         W20              0              0              0              0
MOD_QRY                         W40              0              0              0              0
MOD_QRY_D                       W10              0              0              0              0
MOD_QRY_D                       W20              0              0              0              0
MOD_QRY_D                       W40              0              0              0              0
MTH_QRY                         W10              0              0              0              0
MTH_QRY                         W20              0              0              0              0
MTH_QRY                         W40              0              0              0              0
RSF_QRY                         W10              0              0              0              0
RSF_QRY                         W20              0              0              0              0
RSF_QRY                         W40              0              0              0              0
RSF_TMP                         W10              0              0              0              0
RSF_TMP                         W20              0              0              0              0
RSF_TMP                         W40              0              0              0              0

disk_reads_SLICE
================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           0              0              0              0
MOD_QRY_D                         0              0              0              0
MTH_QRY                           0              0              0              0
RSF_QRY                           0              0              0              0
RSF_TMP                           0              0              0              0

disk_reads_RATIO
================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              0              0              0              0
MOD_QRY                         W20              0              0              0              0
MOD_QRY                         W40              0              0              0              0
MOD_QRY_D                       W10              0              0              0              0
MOD_QRY_D                       W20              0              0              0              0
MOD_QRY_D                       W40              0              0              0              0
MTH_QRY                         W10              0              0              0              0
MTH_QRY                         W20              0              0              0              0
MTH_QRY                         W40              0              0              0              0
RSF_QRY                         W10              0              0              0              0
RSF_QRY                         W20              0              0              0              0
RSF_QRY                         W40              0              0              0              0
RSF_TMP                         W10              0              0              0              0
RSF_TMP                         W20              0              0              0              0
RSF_TMP                         W40              0              0              0              0

disk_reads_SLICE_RATIO
======================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           0              0              0              0
MOD_QRY_D                         0              0              0              0
MTH_QRY                           0              0              0              0
RSF_QRY                           0              0              0              0
RSF_TMP                           0              0              0              0

disk_writes
===========
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              0              0              0              0
MOD_QRY                         W20              0              0              0              0
MOD_QRY                         W40              0              0              0              0
MOD_QRY_D                       W10              0              0              0              0
MOD_QRY_D                       W20              0              0              0              0
MOD_QRY_D                       W40              0              0              0              0
MTH_QRY                         W10              0              0              0              0
MTH_QRY                         W20              0              0              0              0
MTH_QRY                         W40              0              0              0              0
RSF_QRY                         W10              0              0              0              0
RSF_QRY                         W20              0              0              0              0
RSF_QRY                         W40              0              0              0              0
RSF_TMP                         W10              0              0              0              0
RSF_TMP                         W20              0              0              0              0
RSF_TMP                         W40              0              0              0              0

disk_writes_SLICE
=================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           0              0              0              0
MOD_QRY_D                         0              0              0              0
MTH_QRY                           0              0              0              0
RSF_QRY                           0              0              0              0
RSF_TMP                           0              0              0              0

disk_writes_RATIO
=================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              0              0              0              0
MOD_QRY                         W20              0              0              0              0
MOD_QRY                         W40              0              0              0              0
MOD_QRY_D                       W10              0              0              0              0
MOD_QRY_D                       W20              0              0              0              0
MOD_QRY_D                       W40              0              0              0              0
MTH_QRY                         W10              0              0              0              0
MTH_QRY                         W20              0              0              0              0
MTH_QRY                         W40              0              0              0              0
RSF_QRY                         W10              0              0              0              0
RSF_QRY                         W20              0              0              0              0
RSF_QRY                         W40              0              0              0              0
RSF_TMP                         W10              0              0              0              0
RSF_TMP                         W20              0              0              0              0
RSF_TMP                         W40              0              0              0              0

disk_writes_SLICE_RATIO
=======================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           0              0              0              0
MOD_QRY_D                         0              0              0              0
MTH_QRY                           0              0              0              0
RSF_QRY                           0              0              0              0
RSF_TMP                           0              0              0              0

tempseg_size
============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10
MOD_QRY                         W20
MOD_QRY                         W40
MOD_QRY_D                       W10
MOD_QRY_D                       W20
MOD_QRY_D                       W40
MTH_QRY                         W10
MTH_QRY                         W20
MTH_QRY                         W40
RSF_QRY                         W10
RSF_QRY                         W20
RSF_QRY                         W40
RSF_TMP                         W10
RSF_TMP                         W20
RSF_TMP                         W40

tempseg_size_SLICE
==================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY
MOD_QRY_D
MTH_QRY
RSF_QRY
RSF_TMP

tempseg_size_RATIO
==================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10
MOD_QRY                         W20
MOD_QRY                         W40
MOD_QRY_D                       W10
MOD_QRY_D                       W20
MOD_QRY_D                       W40
MTH_QRY                         W10
MTH_QRY                         W20
MTH_QRY                         W40
RSF_QRY                         W10
RSF_QRY                         W20
RSF_QRY                         W40
RSF_TMP                         W10
RSF_TMP                         W20
RSF_TMP                         W40

tempseg_size_SLICE_RATIO
========================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY
MOD_QRY_D
MTH_QRY
RSF_QRY
RSF_TMP

cardinality
===========
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10          10000          20000          40000          80000
MOD_QRY                         W20          20000          40000          80000         160000
MOD_QRY                         W40          40000          80000         160000         320000
MOD_QRY_D                       W10          10000          20000          40000          80000
MOD_QRY_D                       W20          20000          40000          80000         160000
MOD_QRY_D                       W40          40000          80000         160000         320000
MTH_QRY                         W10          10000          20000          40000          80000
MTH_QRY                         W20          20000          40000          80000         160000
MTH_QRY                         W40          40000          80000         160000         320000
RSF_QRY                         W10          10000          20000          40000          80000
RSF_QRY                         W20          20000          40000          80000         160000
RSF_QRY                         W40          40000          80000         160000         320000
RSF_TMP                         W10            100            197            363            948
RSF_TMP                         W20            200            351            729           1592
RSF_TMP                         W40            311            968           1819           3191

cardinality_SLICE
=================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       40000          80000         160000         320000
MOD_QRY_D                     40000          80000         160000         320000
MTH_QRY                       40000          80000         160000         320000
RSF_QRY                       40000          80000         160000         320000
RSF_TMP                         311            968           1819           3191

cardinality_RATIO
=================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10            100         101.52         110.19          84.39
MOD_QRY                         W20            100         113.96         109.74          100.5
MOD_QRY                         W40         128.62          82.64          87.96         100.28
MOD_QRY_D                       W10            100         101.52         110.19          84.39
MOD_QRY_D                       W20            100         113.96         109.74          100.5
MOD_QRY_D                       W40         128.62          82.64          87.96         100.28
MTH_QRY                         W10            100         101.52         110.19          84.39
MTH_QRY                         W20            100         113.96         109.74          100.5
MTH_QRY                         W40         128.62          82.64          87.96         100.28
RSF_QRY                         W10            100         101.52         110.19          84.39
RSF_QRY                         W20            100         113.96         109.74          100.5
RSF_QRY                         W40         128.62          82.64          87.96         100.28
RSF_TMP                         W10              1              1              1              1
RSF_TMP                         W20              1              1              1              1
RSF_TMP                         W40              1              1              1              1

cardinality_SLICE_RATIO
=======================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                      128.62          82.64          87.96         100.28
MOD_QRY_D                    128.62          82.64          87.96         100.28
MTH_QRY                      128.62          82.64          87.96         100.28
RSF_QRY                      128.62          82.64          87.96         100.28
RSF_TMP                           1              1              1              1

output_rows
===========
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10          10000          20000          40000          80000
MOD_QRY                         W20          20000          40000          80000         160000
MOD_QRY                         W40          40000          80000         160000         320000
MOD_QRY_D                       W10          10000          20000          40000          80000
MOD_QRY_D                       W20          20000          40000          80000         160000
MOD_QRY_D                       W40          40000          80000         160000         320000
MTH_QRY                         W10          10000          20000          40000          80000
MTH_QRY                         W20          20000          40000          80000         160000
MTH_QRY                         W40          40000          80000         160000         320000
RSF_QRY                         W10       10000000       40000000      160000000      640000000
RSF_QRY                         W20       20000000       80000000      320000000     1280000000
RSF_QRY                         W40       40000000      160000000      640000000     2560000000
RSF_TMP                         W10          10000          20000          40000          80000
RSF_TMP                         W20          20000          40000          80000         160000
RSF_TMP                         W40          40000          80000         160000         320000

output_rows_SLICE
=================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       40000          80000         160000         320000
MOD_QRY_D                     40000          80000         160000         320000
MTH_QRY                       40000          80000         160000         320000
RSF_QRY                    40000000      160000000      640000000     2560000000
RSF_TMP                       40000          80000         160000         320000

output_rows_RATIO
=================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              1              1              1              1
MOD_QRY                         W20              1              1              1              1
MOD_QRY                         W40              1              1              1              1
MOD_QRY_D                       W10              1              1              1              1
MOD_QRY_D                       W20              1              1              1              1
MOD_QRY_D                       W40              1              1              1              1
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10           1000           2000           4000           8000
RSF_QRY                         W20           1000           2000           4000           8000
RSF_QRY                         W40           1000           2000           4000           8000
RSF_TMP                         W10              1              1              1              1
RSF_TMP                         W20              1              1              1              1
RSF_TMP                         W40              1              1              1              1

output_rows_SLICE_RATIO
=======================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           1              1              1              1
MOD_QRY_D                         1              1              1              1
MTH_QRY                           1              1              1              1
RSF_QRY                        1000           2000           4000           8000
RSF_TMP                           1              1              1              1

cardinality_error
=================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           9895          19795          39594          79192
MOD_QRY                         W20          19791          39589          79185         158382
MOD_QRY                         W40          39578          79171         158375         316771
MOD_QRY_D                       W10           9895          19795          39594          79192
MOD_QRY_D                       W20          19791          39589          79185         158382
MOD_QRY_D                       W40          39578          79171         158375         316771
MTH_QRY                         W10           9895          19795          39594          79192
MTH_QRY                         W20          19791          39589          79185         158382
MTH_QRY                         W40          39578          79171         158375         316771
RSF_QRY                         W10           9990          20010         120010         560010
RSF_QRY                         W20          19989          39980          80020         480020
RSF_QRY                         W40          39989          79979         159960         320040
RSF_TMP                         W10         990010        3920010       14480010       75760010
RSF_TMP                         W20        3980020       14000020       58240020      254560020
RSF_TMP                         W40       12400040       77360040      290880040     1020800040

cardinality_error_SLICE
=======================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       39578          79171         158375         316771
MOD_QRY_D                     39578          79171         158375         316771
MTH_QRY                       39578          79171         158375         316771
RSF_QRY                       39989          79979         159960         320040
RSF_TMP                    12400040       77360040      290880040     1020800040

cardinality_error_RATIO
=======================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              1              1              1              1
MOD_QRY                         W20              1              1              1              1
MOD_QRY                         W40              1              1              1              1
MOD_QRY_D                       W10              1              1              1              1
MOD_QRY_D                       W20              1              1              1              1
MOD_QRY_D                       W40              1              1              1              1
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10           1.01           1.01           3.03           7.07
RSF_QRY                         W20           1.01           1.01           1.01           3.03
RSF_QRY                         W40           1.01           1.01           1.01           1.01
RSF_TMP                         W10         100.05         198.03         365.71         956.66
RSF_TMP                         W20          201.1         353.63         735.49        1607.25
RSF_TMP                         W40         313.31         977.13        1836.65        3222.52

cardinality_error_SLICE_RATIO
=============================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           1              1              1              1
MOD_QRY_D                         1              1              1              1
MTH_QRY                           1              1              1              1
RSF_QRY                        1.01           1.01           1.01           1.01
RSF_TMP                      313.31         977.13        1836.65        3222.52
WITH wit AS (SELECT query_name, point_wide, size_wide, point_deep, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'sorts (rows)' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_wide, '"' || query_name || '","W' || size_wide || '","' || Max (CASE point_deep WH
EN 1 THEN f_real END) || '","' || Max (CASE point_deep WHEN 2 THEN f_real END) || '","' || Max (CASE point_deep WHEN 3 THEN f_real END) || '","' || Max (CASE point_deep WHEN 4 THEN f_real END) || '"'
text FROM wit GROUP BY query_name, point_wide, size_wide) ORDER BY query_name, point_wide


sorts (rows)
============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10          20000          40000          80000         160000
MOD_QRY                         W20          40000          80000         160000         320000
MOD_QRY                         W40          80000         160000         320000         640000
MOD_QRY_D                       W10          30000          60000         120000         240000
MOD_QRY_D                       W20          60000         120000         240000         480000
MOD_QRY_D                       W40         120000         240000         480000         960000
MTH_QRY                         W10          10105          20205          40406          80808
MTH_QRY                         W20          20209          40411          80815         161618
MTH_QRY                         W40          40422          80829         161625         323229
RSF_QRY                         W10       10040000       40080000      160160000      640320000
RSF_QRY                         W20       20080000       80160000      320320000     1280640000
RSF_QRY                         W40       40160000      160320000      640640000     2561280000
RSF_TMP                         W10          60000         113046         190102         359798
RSF_TMP                         W20         111472         189128         350112         672820
RSF_TMP                         W40         185792         359330         677204        1312532

sorts (rows)_SLICE
==================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       80000         160000         320000         640000
MOD_QRY_D                    120000         240000         480000         960000
MTH_QRY                       40422          80829         161625         323229
RSF_QRY                    40160000      160320000      640640000     2561280000
RSF_TMP                      185792         359330         677204        1312532

sorts (rows)_RATIO
==================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           1.98           1.98           1.98           1.98
MOD_QRY                         W20           1.98           1.98           1.98           1.98
MOD_QRY                         W40           1.98           1.98           1.98           1.98
MOD_QRY_D                       W10           2.97           2.97           2.97           2.97
MOD_QRY_D                       W20           2.97           2.97           2.97           2.97
MOD_QRY_D                       W40           2.97           2.97           2.97           2.97
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10         993.57        1983.67        3963.77        7923.97
RSF_QRY                         W20         993.62        1983.62        3963.62        7923.87
RSF_QRY                         W40         993.52        1983.45        3963.74        7924.04
RSF_TMP                         W10           5.94           5.59            4.7           4.45
RSF_TMP                         W20           5.52           4.68           4.33           4.16
RSF_TMP                         W40            4.6           4.45           4.19           4.06

sorts (rows)_SLICE_RATIO
========================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                        1.98           1.98           1.98           1.98
MOD_QRY_D                      2.97           2.97           2.97           2.97
MTH_QRY                           1              1              1              1
RSF_QRY                      993.52        1983.45        3963.74        7924.04
RSF_TMP                         4.6           4.45           4.19           4.06

Top Stats
=========
WITH wit AS (SELECT query_name, point_wide, size_wide, point_deep, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'temp space allocated (bytes)' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_wide, '"' || query_name || '","W' || size_wide || '","' || Max (CA
SE point_deep WHEN 1 THEN f_real END) || '","' || Max (CASE point_deep WHEN 2 THEN f_real END) || '","' || Max (CASE point_deep WHEN 3 THEN f_real END) || '","' || Max (CASE point_deep WHEN 4 THEN f_r
eal END) || '"' text FROM wit GROUP BY query_name, point_wide, size_wide) ORDER BY query_name, point_wide


temp space allocated (bytes)
============================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              0              0              0              0
MOD_QRY                         W20              0              0              0              0
MOD_QRY                         W40              0              0              0              0
MOD_QRY_D                       W10              0              0              0              0
MOD_QRY_D                       W20              0              0              0              0
MOD_QRY_D                       W40              0              0              0              0
MTH_QRY                         W10              0              0              0              0
MTH_QRY                         W20              0              0              0              0
MTH_QRY                         W40              0              0              0              0
RSF_QRY                         W10              0              0              0              0
RSF_QRY                         W20              0              0              0              0
RSF_QRY                         W40              0              0              0              0
RSF_TMP                         W10        2097152        2097152        4194304        6291456
RSF_TMP                         W20        2097152        4194304        6291456       11534336
RSF_TMP                         W40        4194304        6291456       11534336       22020096

temp space allocated (bytes)_SLICE
==================================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           0              0              0              0
MOD_QRY_D                         0              0              0              0
MTH_QRY                           0              0              0              0
RSF_QRY                           0              0              0              0
RSF_TMP                     4194304        6291456       11534336       22020096

temp space allocated (bytes)_RATIO
==================================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              0              0              0              0
MOD_QRY                         W20              0              0              0              0
MOD_QRY                         W40              0              0              0              0
MOD_QRY_D                       W10              0              0              0              0
MOD_QRY_D                       W20              0              0              0              0
MOD_QRY_D                       W40              0              0              0              0
MTH_QRY                         W10              0              0              0              0
MTH_QRY                         W20              0              0              0              0
MTH_QRY                         W40              0              0              0              0
RSF_QRY                         W10              0              0              0              0
RSF_QRY                         W20              0              0              0              0
RSF_QRY                         W40              0              0              0              0
RSF_TMP                         W10  2097152000000  2097152000000  4194304000000  6291456000000
RSF_TMP                         W20  2097152000000  4194304000000  6291456000000 11534336000000
RSF_TMP                         W40  4194304000000  6291456000000 11534336000000 22020096000000

temp space allocated (bytes)_SLICE_RATIO
========================================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           0              0              0              0
MOD_QRY_D                         0              0              0              0
MTH_QRY                           0              0              0              0
RSF_QRY                           0              0              0              0
RSF_TMP               4194304000000  6291456000000 11534336000000 22020096000000
WITH wit AS (SELECT query_name, point_wide, size_wide, point_deep, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'process queue reference' AND stat_type = 'LATCH') SELECT text FROM (SELECT query_name, point_wide, '"' || query_name || '","W' || size_wide || '","' || Max (CASE p
oint_deep WHEN 1 THEN f_real END) || '","' || Max (CASE point_deep WHEN 2 THEN f_real END) || '","' || Max (CASE point_deep WHEN 3 THEN f_real END) || '","' || Max (CASE point_deep WHEN 4 THEN f_real
END) || '"' text FROM wit GROUP BY query_name, point_wide, size_wide) ORDER BY query_name, point_wide


process queue reference
=======================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           1042          27017           9012          67269
MOD_QRY                         W20           2104           6858          70058         128878
MOD_QRY                         W40           3442          14426          92323         384220
MOD_QRY_D                       W10              1              1              1              1
MOD_QRY_D                       W20              1              1              1              1
MOD_QRY_D                       W40              1              1              1           1046
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10              1           1039           3385          26168
RSF_QRY                         W20              1           2093           6487          68317
RSF_QRY                         W40           1044           4443          33129          98338
RSF_TMP                         W10              1              1              1              1
RSF_TMP                         W20              1              1              1              1
RSF_TMP                         W40              1              1              1              1

process queue reference_SLICE
=============================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                        3442          14426          92323         384220
MOD_QRY_D                         1              1              1           1046
MTH_QRY                           1              1              1              1
RSF_QRY                        1044           4443          33129          98338
RSF_TMP                           1              1              1              1

process queue reference_RATIO
=============================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           1042          27017           9012          67269
MOD_QRY                         W20           2104           6858          70058         128878
MOD_QRY                         W40           3442          14426          92323         384220
MOD_QRY_D                       W10              1              1              1              1
MOD_QRY_D                       W20              1              1              1              1
MOD_QRY_D                       W40              1              1              1           1046
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10              1           1039           3385          26168
RSF_QRY                         W20              1           2093           6487          68317
RSF_QRY                         W40           1044           4443          33129          98338
RSF_TMP                         W10              1              1              1              1
RSF_TMP                         W20              1              1              1              1
RSF_TMP                         W40              1              1              1              1

process queue reference_SLICE_RATIO
===================================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                        3442          14426          92323         384220
MOD_QRY_D                         1              1              1           1046
MTH_QRY                           1              1              1              1
RSF_QRY                        1044           4443          33129          98338
RSF_TMP                           1              1              1              1
WITH wit AS (SELECT query_name, point_wide, size_wide, point_deep, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'table scan disk non-IMC rows gotten' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_wide, '"' || query_name || '","W' || size_wide || '","' ||
Max (CASE point_deep WHEN 1 THEN f_real END) || '","' || Max (CASE point_deep WHEN 2 THEN f_real END) || '","' || Max (CASE point_deep WHEN 3 THEN f_real END) || '","' || Max (CASE point_deep WHEN 4 T
HEN f_real END) || '"' text FROM wit GROUP BY query_name, point_wide, size_wide) ORDER BY query_name, point_wide


table scan disk non-IMC rows gotten
===================================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10          10000          20000          40000          80000
MOD_QRY                         W20          20000          40000          80000         160000
MOD_QRY                         W40          40000          80000         160000         320000
MOD_QRY_D                       W10          10000          20000          40000          80000
MOD_QRY_D                       W20          20000          40000          80000         160000
MOD_QRY_D                       W40          40000          80000         160000         320000
MTH_QRY                         W10          10000          20000          40000          80000
MTH_QRY                         W20          20000          40000          80000         160000
MTH_QRY                         W40          40000          80000         160000         320000
RSF_QRY                         W10       10010000       40020000      160040000      640080000
RSF_QRY                         W20       20020000       80040000      320080000     1280160000
RSF_QRY                         W40       40040000      160080000      640160000     2560320000
RSF_TMP                         W10          30000          20000          40000          80000
RSF_TMP                         W20          20000          40000          80000         160000
RSF_TMP                         W40          40000          80000         160000         320000

table scan disk non-IMC rows gotten_SLICE
=========================================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       40000          80000         160000         320000
MOD_QRY_D                     40000          80000         160000         320000
MTH_QRY                       40000          80000         160000         320000
RSF_QRY                    40040000      160080000      640160000     2560320000
RSF_TMP                       40000          80000         160000         320000

table scan disk non-IMC rows gotten_RATIO
=========================================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10              1              1              1              1
MOD_QRY                         W20              1              1              1              1
MOD_QRY                         W40              1              1              1              1
MOD_QRY_D                       W10              1              1              1              1
MOD_QRY_D                       W20              1              1              1              1
MOD_QRY_D                       W40              1              1              1              1
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10           1001           2001           4001           8001
RSF_QRY                         W20           1001           2001           4001           8001
RSF_QRY                         W40           1001           2001           4001           8001
RSF_TMP                         W10              3              1              1              1
RSF_TMP                         W20              1              1              1              1
RSF_TMP                         W40              1              1              1              1

table scan disk non-IMC rows gotten_SLICE_RATIO
===============================================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           1              1              1              1
MOD_QRY_D                         1              1              1              1
MTH_QRY                           1              1              1              1
RSF_QRY                        1001           2001           4001           8001
RSF_TMP                           1              1              1              1
WITH wit AS (SELECT query_name, point_wide, size_wide, point_deep, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'sorts (rows)' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_wide, '"' || query_name || '","W' || size_wide || '","' || Max (CASE point_deep WH
EN 1 THEN f_real END) || '","' || Max (CASE point_deep WHEN 2 THEN f_real END) || '","' || Max (CASE point_deep WHEN 3 THEN f_real END) || '","' || Max (CASE point_deep WHEN 4 THEN f_real END) || '"'
text FROM wit GROUP BY query_name, point_wide, size_wide) ORDER BY query_name, point_wide


sorts (rows)
============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10          20000          40000          80000         160000
MOD_QRY                         W20          40000          80000         160000         320000
MOD_QRY                         W40          80000         160000         320000         640000
MOD_QRY_D                       W10          30000          60000         120000         240000
MOD_QRY_D                       W20          60000         120000         240000         480000
MOD_QRY_D                       W40         120000         240000         480000         960000
MTH_QRY                         W10          10105          20205          40406          80808
MTH_QRY                         W20          20209          40411          80815         161618
MTH_QRY                         W40          40422          80829         161625         323229
RSF_QRY                         W10       10040000       40080000      160160000      640320000
RSF_QRY                         W20       20080000       80160000      320320000     1280640000
RSF_QRY                         W40       40160000      160320000      640640000     2561280000
RSF_TMP                         W10          60000         113046         190102         359798
RSF_TMP                         W20         111472         189128         350112         672820
RSF_TMP                         W40         185792         359330         677204        1312532

sorts (rows)_SLICE
==================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                       80000         160000         320000         640000
MOD_QRY_D                    120000         240000         480000         960000
MTH_QRY                       40422          80829         161625         323229
RSF_QRY                    40160000      160320000      640640000     2561280000
RSF_TMP                      185792         359330         677204        1312532

sorts (rows)_RATIO
==================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           1.98           1.98           1.98           1.98
MOD_QRY                         W20           1.98           1.98           1.98           1.98
MOD_QRY                         W40           1.98           1.98           1.98           1.98
MOD_QRY_D                       W10           2.97           2.97           2.97           2.97
MOD_QRY_D                       W20           2.97           2.97           2.97           2.97
MOD_QRY_D                       W40           2.97           2.97           2.97           2.97
MTH_QRY                         W10              1              1              1              1
MTH_QRY                         W20              1              1              1              1
MTH_QRY                         W40              1              1              1              1
RSF_QRY                         W10         993.57        1983.67        3963.77        7923.97
RSF_QRY                         W20         993.62        1983.62        3963.62        7923.87
RSF_QRY                         W40         993.52        1983.45        3963.74        7924.04
RSF_TMP                         W10           5.94           5.59            4.7           4.45
RSF_TMP                         W20           5.52           4.68           4.33           4.16
RSF_TMP                         W40            4.6           4.45           4.19           4.06

sorts (rows)_SLICE_RATIO
========================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                        1.98           1.98           1.98           1.98
MOD_QRY_D                      2.97           2.97           2.97           2.97
MTH_QRY                           1              1              1              1
RSF_QRY                      993.52        1983.45        3963.74        7924.04
RSF_TMP                         4.6           4.45           4.19           4.06
WITH wit AS (SELECT query_name, point_wide, size_wide, point_deep, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'logical read bytes from cache' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_wide, '"' || query_name || '","W' || size_wide || '","' || Max (C
ASE point_deep WHEN 1 THEN f_real END) || '","' || Max (CASE point_deep WHEN 2 THEN f_real END) || '","' || Max (CASE point_deep WHEN 3 THEN f_real END) || '","' || Max (CASE point_deep WHEN 4 THEN f_
real END) || '"' text FROM wit GROUP BY query_name, point_wide, size_wide) ORDER BY query_name, point_wide


logical read bytes from cache
=============================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10       16826368       15958016       17334272       19701760
MOD_QRY                         W20       17080320       17186816       18071552        8036352
MOD_QRY                         W40        4792320        5472256        8077312       12050432
MOD_QRY_D                       W10       16089088       17178624       17670144       18513920
MOD_QRY_D                       W20       16539648       17154048       18694144        8011776
MOD_QRY_D                       W40        4792320        5873664        8282112       12124160
MTH_QRY                         W10       16670720       17211392       17063936       18399232
MTH_QRY                         W20       16777216       17596416       18145280        7299072
MTH_QRY                         W40        5431296        5898240        7847936       12722176
RSF_QRY                         W10      387252224     1325637632     6252453888    21930770432
RSF_QRY                         W20      768524288     3647430656    11544403968    39743684608
RSF_QRY                         W40     2070929408     6337478656    21098643456    76724371456
RSF_TMP                         W10      185991168      431144960      955179008     2030608384
RSF_TMP                         W20      430202880      952655872     2024398848     4234272768
RSF_TMP                         W40      956489728     2049122304     4332290048    10213171200

logical read bytes from cache_SLICE
===================================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                     4792320        5472256        8077312       12050432
MOD_QRY_D                   4792320        5873664        8282112       12124160
MTH_QRY                     5431296        5898240        7847936       12722176
RSF_QRY                  2070929408     6337478656    21098643456    76724371456
RSF_TMP                   956489728     2049122304     4332290048    10213171200

logical read bytes from cache_RATIO
===================================
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           1.05              1           1.02           1.07
MOD_QRY                         W20           1.03              1              1            1.1
MOD_QRY                         W40              1              1           1.03              1
MOD_QRY_D                       W10              1           1.08           1.04           1.01
MOD_QRY_D                       W20              1              1           1.03            1.1
MOD_QRY_D                       W40              1           1.07           1.06           1.01
MTH_QRY                         W10           1.04           1.08              1              1
MTH_QRY                         W20           1.01           1.03              1              1
MTH_QRY                         W40           1.13           1.08              1           1.06
RSF_QRY                         W10          24.07          83.07         366.41        1191.94
RSF_QRY                         W20          46.47         212.63         638.82        5445.03
RSF_QRY                         W40         432.14        1158.11        2688.43        6366.94
RSF_TMP                         W10          11.56          27.02          55.98         110.36
RSF_TMP                         W20          26.01          55.54         112.02         580.11
RSF_TMP                         W40         199.59         374.46         552.03         847.54

logical read bytes from cache_SLICE_RATIO
=========================================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           1              1           1.03              1
MOD_QRY_D                         1           1.07           1.06           1.01
MTH_QRY                        1.13           1.08              1           1.06
RSF_QRY                      432.14        1158.11        2688.43        6366.94
RSF_TMP                      199.59         374.46         552.03         847.54
WITH wit AS (SELECT query_name, point_wide, size_wide, point_deep, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'redo size' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_wide, '"' || query_name || '","W' || size_wide || '","' || Max (CASE point_deep WHEN
1 THEN f_real END) || '","' || Max (CASE point_deep WHEN 2 THEN f_real END) || '","' || Max (CASE point_deep WHEN 3 THEN f_real END) || '","' || Max (CASE point_deep WHEN 4 THEN f_real END) || '"' tex
t FROM wit GROUP BY query_name, point_wide, size_wide) ORDER BY query_name, point_wide


redo size
=========
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10         385788         325816         346144         390064
MOD_QRY                         W20         386152         327056         325916         346140
MOD_QRY                         W40         344756         344380         366016         380912
MOD_QRY_D                       W10         345476         353168         382596         363040
MOD_QRY_D                       W20         347244         343584         381004         364440
MOD_QRY_D                       W40         379896         380304         333460         347928
MTH_QRY                         W10         383860         386196         343428         361868
MTH_QRY                         W20         381604         380396         342680         324824
MTH_QRY                         W40         369580         348136         346828         369596
RSF_QRY                         W10         343244         343888         384680         324972
RSF_QRY                         W20         343360         351672         351804         348752
RSF_QRY                         W40         392176         380396         380492         343920
RSF_TMP                         W10        1011996        1709376        3027732        5711344
RSF_TMP                         W20        1761236        3217776        6021064       11683492
RSF_TMP                         W40        3389236        6522596       12715036       25113080

redo size_SLICE
===============
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                      344756         344380         366016         380912
MOD_QRY_D                    379896         380304         333460         347928
MTH_QRY                      369580         348136         346828         369596
RSF_QRY                      392176         380396         380492         343920
RSF_TMP                     3389236        6522596       12715036       25113080

redo size_RATIO
===============
Run Type                      Width          D1000          D2000          D4000          D8000
MOD_QRY                         W10           1.12              1           1.01            1.2
MOD_QRY                         W20           1.12              1              1           1.07
MOD_QRY                         W40              1              1            1.1           1.11
MOD_QRY_D                       W10           1.01           1.08           1.11           1.12
MOD_QRY_D                       W20           1.01           1.05           1.17           1.12
MOD_QRY_D                       W40            1.1            1.1              1           1.01
MTH_QRY                         W10           1.12           1.19              1           1.11
MTH_QRY                         W20           1.11           1.16           1.05              1
MTH_QRY                         W40           1.07           1.01           1.04           1.07
RSF_QRY                         W10              1           1.06           1.12              1
RSF_QRY                         W20              1           1.08           1.08           1.07
RSF_QRY                         W40           1.14            1.1           1.14              1
RSF_TMP                         W10           2.95           5.25           8.82          17.57
RSF_TMP                         W20           5.13           9.84          18.47          35.97
RSF_TMP                         W40           9.83          18.94          38.13          73.02

redo size_SLICE_RATIO
=====================
Run Type                      D1000          D2000          D4000          D8000
MOD_QRY                           1              1            1.1           1.11
MOD_QRY_D                       1.1            1.1              1           1.01
MTH_QRY                        1.07           1.01           1.04           1.07
RSF_QRY                        1.14            1.1           1.14              1
RSF_TMP                        9.83          18.94          38.13          73.02

Timer Set: File Writer, Constructed at 23 Nov 2016 01:03:15, written at 01:03:17
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000016), CPU (per call): 0.01 (0.000010), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)        2.03        1.94             1        2.03100        1.94000
-------  ----------  ----------  ------------  -------------  -------------
Total          2.03        1.94             3        0.67700        0.64667
-------  ----------  ----------  ------------  -------------  -------------
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, FACT f_real, Round (FACT / Greatest (Min (FACT) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM bench_v$sql_pl
an_stats_all_v) SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' || Max (CASE point_wide WHEN 1 THEN f_real END) || '","' || Max (CASE point_wide WHEN
 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name, point_deep, size_deep) ORDER BY query_name, point_deep


Distinct Plans
==============
MOD_QRY: 3/4 (1 of 1)
SQL_ID  2ytj4xgt4v9s4, child number 0
-------------------------------------
/* MOD_QRY */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES AUTOMATIC
ORDER ( sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
= PRESENTV (final_grp[cv()+1], CASE WHEN sub_weight[cv()] >= 5000 THEN
id[cv()] ELSE final_grp[cv()+1] END, id[cv()]) ) ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","817"' FROM all_rows GROUP BY cat, final_grp ORDER BY
cat, final_grp

Plan hash value: 1769595206

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:21:10.69 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:21:10.69 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|55:38:12.41 |    1074 |       |       |          |
|   3 |    SQL MODEL CYCLIC   |       |      1 |    320K|    320K|55:38:12.36 |    1074 |    38M|  4773K|   32M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.19 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------

MOD_QRY_D: 3/4 (1 of 1)
SQL_ID  2ws6cb6spn1tm, child number 0
-------------------------------------
/* MOD_QRY_D */ WITH all_rows AS ( SELECT id, cat, seq, weight,
sub_weight, final_grp FROM items MODEL PARTITION BY (cat) DIMENSION BY
(Row_Number() OVER (PARTITION BY cat ORDER BY seq DESC) rn) MEASURES
(id, weight, weight sub_weight, id final_grp, seq) RULES (
sub_weight[rn > 1] = CASE WHEN sub_weight[cv()-1] >= 5000 THEN
weight[cv()] ELSE sub_weight[cv()-1] + weight[cv()] END, final_grp[ANY]
ORDER BY rn DESC = PRESENTV (final_grp[cv()+1], CASE WHEN
sub_weight[cv()] >= 5000 THEN id[cv()] ELSE final_grp[cv()+1] END,
id[cv()]) ) ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || COUNT(*) || '","9807"' FROM all_rows GROUP BY
cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3654604359

--------------------------------------------------------------------------------------------------------------------
| Id  | Operation             | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |       |      1 |        |   3229 |00:00:02.43 |    1074 |       |       |          |
|   1 |  SORT GROUP BY        |       |      1 |    320K|   3229 |00:00:02.43 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                |       |      1 |    320K|    320K|00:01:32.47 |    1074 |       |       |          |
|   3 |    SQL MODEL ORDERED  |       |      1 |    320K|    320K|00:01:32.42 |    1074 |    36M|  4844K|   29M (0)|
|   4 |     WINDOW SORT       |       |      1 |    320K|    320K|00:00:00.18 |    1074 |    15M|  1460K|   13M (0)|
|   5 |      TABLE ACCESS FULL| ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
--------------------------------------------------------------------------------------------------------------------

MTH_QRY: 3/4 (1 of 1)
SQL_ID  3h9qsj5tyf2ah, child number 0
-------------------------------------
/* MTH_QRY */ SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat || '","'
|| final_grp || '","' || num_rows || '","7787"' FROM items
MATCH_RECOGNIZE ( PARTITION BY cat ORDER BY seq DESC MEASURES FINAL
LAST (id) final_grp, COUNT(*) num_rows ONE ROW PER MATCH PATTERN (s*
t?) DEFINE s AS Sum (weight) < 5000, t AS Sum (weight) >= 5000 ) m
ORDER BY cat, final_grp

Plan hash value: 1353329411

---------------------------------------------------------------------------------------------------------------------
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |       |      1 |        |   3229 |00:00:00.17 |    1074 |       |       |          |
|   1 |  SORT ORDER BY         |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |   267K|   267K|  237K (0)|
|   2 |   VIEW                 |       |      1 |    320K|   3229 |00:00:00.17 |    1074 |       |       |          |
|   3 |    MATCH RECOGNIZE SORT|       |      1 |    320K|   3229 |00:00:00.17 |    1074 |    15M|  1460K|   13M (0)|
|   4 |     TABLE ACCESS FULL  | ITEMS |      1 |    320K|    320K|00:00:00.03 |    1074 |       |       |          |
---------------------------------------------------------------------------------------------------------------------

RSF_QRY: 3/4 (1 of 1)
SQL_ID  94y37zwgjs9ug, child number 0
-------------------------------------
/* RSF_QRY */ WITH itm AS ( SELECT id, cat, seq, weight, Row_Number()
OVER (PARTITION BY cat ORDER BY seq DESC) rn FROM items ), rsq (id,
cat, rn, seq, weight, sub_weight, grp_num) AS ( SELECT id, cat, rn,
seq, weight, weight, 1 FROM itm WHERE rn = 1 UNION ALL SELECT itm.id,
itm.cat, itm.rn, itm.seq, itm.weight, itm.weight + CASE WHEN
rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num +
CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN itm ON
itm.rn = rsq.rn + 1 AND itm.cat = rsq.cat ), final_grouping AS ( SELECT
cat cat, First_Value(id) OVER (PARTITION BY cat, grp_num ORDER BY seq)
final_grp FROM rsq ) SELECT /*+ GATHER_PLAN_STATISTICS */ '"' || cat ||
'","' || final_grp || '","' || COUNT(*) || '","5736"' FROM
final_grouping GROUP BY cat, final_grp ORDER BY cat, final_grp

Plan hash value: 3844655400

-------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
-------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |       |      1 |        |   3229 |00:08:50.80 |    9365K|       |       |          |
|   1 |  SORT GROUP BY                               |       |      1 |     81 |   3229 |00:08:50.80 |    9365K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |       |      1 |     81 |    320K|00:08:50.80 |    9365K|       |       |          |
|   3 |    WINDOW SORT                               |       |      1 |     81 |    320K|00:08:50.75 |    9365K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |       |      1 |     81 |    320K|01:13:10.25 |    9365K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|       |      1 |        |    320K|01:13:10.14 |    9365K|  4096 |  4096 |   20M (0)|
|*  6 |       VIEW                                   |       |      1 |      1 |     40 |00:00:00.34 |    1074 |       |       |          |
|*  7 |        WINDOW SORT PUSHED RANK               |       |      1 |    320K|     40 |00:00:00.34 |    1074 |    23M|  1772K|   20M (0)|
|   8 |         TABLE ACCESS FULL                    | ITEMS |      1 |    320K|    320K|00:00:00.04 |    1074 |       |       |          |
|*  9 |       HASH JOIN                              |       |   8000 |     80 |    319K|00:25:04.02 |    8592K|  1214K|  1214K| 1283K (0)|
|  10 |        RECURSIVE WITH PUMP                   |       |   8000 |        |    320K|00:00:00.19 |       0 |       |       |          |
|  11 |        VIEW                                  |       |   8000 |    320K|   2560M|00:30:26.18 |    8592K|       |       |          |
|  12 |         WINDOW SORT                          |       |   8000 |    320K|   2560M|00:24:31.69 |    8592K|    15M|  1460K|   13M (0)|
|  13 |          TABLE ACCESS FULL                   | ITEMS |   8000 |    320K|   2560M|00:04:01.43 |    8592K|       |       |          |
-------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   6 - filter("RN"=1)
   7 - filter(ROW_NUMBER() OVER ( PARTITION BY "CAT" ORDER BY INTERNAL_FUNCTION("SEQ") DESC )<=1)
   9 - access("ITM"."RN"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

RSF_TMP: 3/4 (1 of 1)
SQL_ID  3u062brw9anr9, child number 0
-------------------------------------
/* RSF_TMP */ WITH rsq (id, cat, rn, seq, weight, sub_weight, grp_num)
AS ( SELECT id, cat, itm_rownum, seq, weight, weight, 1 FROM items_tmp
WHERE itm_rownum = 1 UNION ALL SELECT /*+ INDEX (itm items_tmp_n1) */
itm.id, itm.cat, itm.itm_rownum, itm.seq, itm.weight, itm.weight + CASE
WHEN rsq.sub_weight >= 5000 THEN 0 ELSE rsq.sub_weight END, rsq.grp_num
+ CASE WHEN rsq.sub_weight >= 5000 THEN 1 ELSE 0 END FROM rsq JOIN
items_tmp itm ON itm.itm_rownum = rsq.rn + 1 AND itm.cat = rsq.cat ),
final_grouping AS ( SELECT cat cat, First_Value(id) OVER (PARTITION BY
cat, grp_num ORDER BY seq) final_grp FROM rsq ) SELECT /*+
GATHER_PLAN_STATISTICS */ '"' || cat || '","' || final_grp || '","' ||
COUNT(*) || '","8326"' FROM final_grouping GROUP BY cat, final_grp
ORDER BY cat, final_grp

Plan hash value: 3755682712

--------------------------------------------------------------------------------------------------------------------------------------------------
| Id  | Operation                                    | Name         | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
--------------------------------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                             |              |      1 |        |   3229 |00:00:02.69 |    1118K|       |       |          |
|   1 |  SORT GROUP BY                               |              |      1 |     91 |   3229 |00:00:02.69 |    1118K|   267K|   267K|  237K (0)|
|   2 |   VIEW                                       |              |      1 |     91 |    320K|00:00:02.69 |    1118K|       |       |          |
|   3 |    WINDOW SORT                               |              |      1 |     91 |    320K|00:00:02.63 |    1118K|    13M|  1417K|   12M (0)|
|   4 |     VIEW                                     |              |      1 |     91 |    320K|00:00:02.73 |    1118K|       |       |          |
|   5 |      UNION ALL (RECURSIVE WITH) BREADTH FIRST|              |      1 |        |    320K|00:00:02.65 |    1118K|  4096 |  4096 |   20M (0)|
|   6 |       TABLE ACCESS BY INDEX ROWID BATCHED    | ITEMS_TMP    |      1 |     40 |     40 |00:00:00.01 |      43 |       |       |          |
|*  7 |        INDEX RANGE SCAN                      | ITEMS_TMP_N1 |      1 |     40 |     40 |00:00:00.01 |       3 |       |       |          |
|   8 |       NESTED LOOPS                           |              |   8000 |     51 |    319K|00:00:01.15 |     346K|       |       |          |
|   9 |        RECURSIVE WITH PUMP                   |              |   8000 |        |    320K|00:00:00.07 |       0 |       |       |          |
|  10 |        TABLE ACCESS BY INDEX ROWID BATCHED   | ITEMS_TMP    |    320K|      1 |    319K|00:00:00.78 |     346K|       |       |          |
|* 11 |         INDEX RANGE SCAN                     | ITEMS_TMP_N1 |    320K|   3191 |    319K|00:00:00.31 |   26059 |       |       |          |
--------------------------------------------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   7 - access("ITM_ROWNUM"=1)
  11 - access("ITM"."ITM_ROWNUM"="RSQ"."RN"+1 AND "ITM"."CAT"="RSQ"."CAT")

Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - this is an adaptive plan


Data Points
===========
Data Point:               size_wide      size_deep       cpu_time        elapsed       num_recs       per_part     group_size
Data Point                       10           1000            .66           .797          10000           1000            116
Data Point                       10           2000           1.14           1.25          20000           2000            112
Data Point                       10           4000           2.24          2.485          40000           4000            108
Data Point                       10           8000           4.37          4.563          80000           8000            105
Data Point                       20           1000           1.16          1.266          20000           1000            132
Data Point                       20           2000           2.25          2.265          40000           2000            121
Data Point                       20           4000           4.45          6.001          80000           4000            113
Data Point                       20           8000           8.81         10.517         160000           8000            112
Data Point                       40           1000           2.31          2.532          40000           1000            156
Data Point                       40           2000           4.43          7.219          80000           2000            147
Data Point                       40           4000           8.88         11.892         160000           4000            129
Data Point                       40           8000          17.71         27.519         320000           8000            124

num_records_out
===============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000            105            209            422
MOD_QRY                       D2000            205            411            829
MOD_QRY                       D4000            406            815           1625
MOD_QRY                       D8000            808           1618           3229
MOD_QRY_D                     D1000            105            209            422
MOD_QRY_D                     D2000            205            411            829
MOD_QRY_D                     D4000            406            815           1625
MOD_QRY_D                     D8000            808           1618           3229
MTH_QRY                       D1000            105            209            422
MTH_QRY                       D2000            205            411            829
MTH_QRY                       D4000            406            815           1625
MTH_QRY                       D8000            808           1618           3229
RSF_QRY                       D1000            105            209            422
RSF_QRY                       D2000            205            411            829
RSF_QRY                       D4000            406            815           1625
RSF_QRY                       D8000            808           1618           3229
RSF_TMP                       D1000            105            209            422
RSF_TMP                       D2000            205            411            829
RSF_TMP                       D4000            406            815           1625
RSF_TMP                       D8000            808           1618           3229

num_records_out_SLICE
=====================
Run Type                        W10            W20            W40
MOD_QRY                         808           1618           3229
MOD_QRY_D                       808           1618           3229
MTH_QRY                         808           1618           3229
RSF_QRY                         808           1618           3229
RSF_TMP                         808           1618           3229

num_records_out_RATIO
=====================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              1              1              1
MOD_QRY                       D2000              1              1              1
MOD_QRY                       D4000              1              1              1
MOD_QRY                       D8000              1              1              1
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000              1              1              1
MOD_QRY_D                     D4000              1              1              1
MOD_QRY_D                     D8000              1              1              1
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000              1              1              1
RSF_QRY                       D2000              1              1              1
RSF_QRY                       D4000              1              1              1
RSF_QRY                       D8000              1              1              1
RSF_TMP                       D1000              1              1              1
RSF_TMP                       D2000              1              1              1
RSF_TMP                       D4000              1              1              1
RSF_TMP                       D8000              1              1              1

num_records_out_SLICE_RATIO
===========================
Run Type                        W10            W20            W40
MOD_QRY                           1              1              1
MOD_QRY_D                         1              1              1
MTH_QRY                           1              1              1
RSF_QRY                           1              1              1
RSF_TMP                           1              1              1

cpu_time
========
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000             16          47.25          99.14
MOD_QRY                       D2000           61.5          189.5         396.54
MOD_QRY                       D4000         243.04         761.91        1389.86
MOD_QRY                       D8000         961.72        2082.06        5565.41
MOD_QRY_D                     D1000            .08            .15            .32
MOD_QRY_D                     D2000            .16             .3             .6
MOD_QRY_D                     D4000            .29            .59           1.19
MOD_QRY_D                     D8000            .59           1.21           2.42
MTH_QRY                       D1000              0            .01            .01
MTH_QRY                       D2000            .01            .01            .04
MTH_QRY                       D4000            .02            .04            .07
MTH_QRY                       D8000            .05             .1            .17
RSF_QRY                       D1000           5.89          11.63          23.53
RSF_QRY                       D2000          23.15          45.99          93.64
RSF_QRY                       D4000          92.19         184.83         377.25
RSF_QRY                       D8000          368.7         749.77        1512.85
RSF_TMP                       D1000             .1            .19            .36
RSF_TMP                       D2000            .19            .37            .73
RSF_TMP                       D4000            .39            .76           1.54
RSF_TMP                       D8000            .76           1.54           3.27

cpu_time_SLICE
==============
Run Type                        W10            W20            W40
MOD_QRY                      961.72        2082.06        5565.41
MOD_QRY_D                       .59           1.21           2.42
MTH_QRY                         .05             .1            .17
RSF_QRY                       368.7         749.77        1512.85
RSF_TMP                         .76           1.54           3.27

cpu_time_RATIO
==============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000       16000000           4725           9914
MOD_QRY                       D2000           6150          18950         9913.5
MOD_QRY                       D4000          12152       19047.75       19855.14
MOD_QRY                       D8000        19234.4        20820.6       32737.71
MOD_QRY_D                     D1000          80000             15             32
MOD_QRY_D                     D2000             16             30             15
MOD_QRY_D                     D4000           14.5          14.75             17
MOD_QRY_D                     D8000           11.8           12.1          14.24
MTH_QRY                       D1000              0              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000        5890000           1163           2353
RSF_QRY                       D2000           2315           4599           2341
RSF_QRY                       D4000         4609.5        4620.75        5389.29
RSF_QRY                       D8000           7374         7497.7        8899.12
RSF_TMP                       D1000         100000             19             36
RSF_TMP                       D2000             19             37          18.25
RSF_TMP                       D4000           19.5             19             22
RSF_TMP                       D8000           15.2           15.4          19.24

cpu_time_SLICE_RATIO
====================
Run Type                        W10            W20            W40
MOD_QRY                     19234.4        20820.6       32737.71
MOD_QRY_D                      11.8           12.1          14.24
MTH_QRY                           1              1              1
RSF_QRY                        7374         7497.7        8899.12
RSF_TMP                        15.2           15.4          19.24

elapsed_time
============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000         16.002         47.257          99.14
MOD_QRY                       D2000         61.506        189.504        396.538
MOD_QRY                       D4000         243.07        761.983       1389.921
MOD_QRY                       D8000        961.818       2082.192       5565.654
MOD_QRY_D                     D1000           .078           .157           .312
MOD_QRY_D                     D2000           .156           .298            .61
MOD_QRY_D                     D4000           .297           .594          1.188
MOD_QRY_D                     D8000           .594          1.203          2.422
MTH_QRY                       D1000              0           .016           .016
MTH_QRY                       D2000           .016           .016           .047
MTH_QRY                       D4000           .016           .031           .078
MTH_QRY                       D8000           .047           .094           .172
RSF_QRY                       D1000          5.891         11.626         23.533
RSF_QRY                       D2000         23.159         45.973         93.651
RSF_QRY                       D4000         92.182        184.832        377.278
RSF_QRY                       D8000        368.731        749.806        1512.88
RSF_TMP                       D1000           .094           .188            .36
RSF_TMP                       D2000           .188           .375           .734
RSF_TMP                       D4000           .391           .766          1.531
RSF_TMP                       D8000           .766          1.547          3.485

elapsed_time_SLICE
==================
Run Type                        W10            W20            W40
MOD_QRY                     961.818       2082.192       5565.654
MOD_QRY_D                      .594          1.203          2.422
MTH_QRY                        .047           .094           .172
RSF_QRY                     368.731        749.806        1512.88
RSF_TMP                        .766          1.547          3.485

elapsed_time_RATIO
==================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000       16002000        2953.56        6196.25
MOD_QRY                       D2000        3844.13          11844        8436.98
MOD_QRY                       D4000       15191.88        24580.1        17819.5
MOD_QRY                       D8000       20464.21       22150.98       32358.45
MOD_QRY_D                     D1000          78000           9.81           19.5
MOD_QRY_D                     D2000           9.75          18.63          12.98
MOD_QRY_D                     D4000          18.56          19.16          15.23
MOD_QRY_D                     D8000          12.64           12.8          14.08
MTH_QRY                       D1000              0              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000        5891000         726.63        1470.81
RSF_QRY                       D2000        1447.44        2873.31        1992.57
RSF_QRY                       D4000        5761.38        5962.32         4836.9
RSF_QRY                       D8000        7845.34        7976.66        8795.81
RSF_TMP                       D1000          94000          11.75           22.5
RSF_TMP                       D2000          11.75          23.44          15.62
RSF_TMP                       D4000          24.44          24.71          19.63
RSF_TMP                       D8000           16.3          16.46          20.26

elapsed_time_SLICE_RATIO
========================
Run Type                        W10            W20            W40
MOD_QRY                    20464.21       22150.98       32358.45
MOD_QRY_D                     12.64           12.8          14.08
MTH_QRY                           1              1              1
RSF_QRY                     7845.34        7976.66        8795.81
RSF_TMP                        16.3          16.46          20.26

memory_used
===========
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000        1735680        3708928        5314560
MOD_QRY                       D2000        3250176        5952512        9918464
MOD_QRY                       D4000        5727232       10167296       18241536
MOD_QRY                       D8000        9653248       19100672       34169856
MOD_QRY_D                     D1000        1371136        2531328        4573184
MOD_QRY_D                     D2000        2521088        4429824        8634368
MOD_QRY_D                     D4000        4744192        8124416       16484352
MOD_QRY_D                     D8000        8128512       16745472       30871552
MTH_QRY                       D1000         563200         950272        1853440
MTH_QRY                       D2000         950272        1853440        3530752
MTH_QRY                       D4000        1788928        3530752        7014400
MTH_QRY                       D8000        3530752        6949888       13981696
RSF_QRY                       D1000         913408        1401856        2756608
RSF_QRY                       D2000        1401856        2756608        5530624
RSF_QRY                       D4000        2756608        5530624       11014144
RSF_QRY                       D8000        5530624       11014144       21916672
RSF_TMP                       D1000         692224        1401856        2756608
RSF_TMP                       D2000        1401856        2756608        5466112
RSF_TMP                       D4000        2756608        5466112       10949632
RSF_TMP                       D8000        5401600       10885120       21852160

memory_used_SLICE
=================
Run Type                        W10            W20            W40
MOD_QRY                     9653248       19100672       34169856
MOD_QRY_D                   8128512       16745472       30871552
MTH_QRY                     3530752        6949888       13981696
RSF_QRY                     5530624       11014144       21916672
RSF_TMP                     5401600       10885120       21852160

memory_used_RATIO
=================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           3.08            3.9           2.87
MOD_QRY                       D2000           3.42           3.21           2.81
MOD_QRY                       D4000            3.2           2.88            2.6
MOD_QRY                       D8000           2.73           2.75           2.44
MOD_QRY_D                     D1000           2.43           2.66           2.47
MOD_QRY_D                     D2000           2.65           2.39           2.45
MOD_QRY_D                     D4000           2.65            2.3           2.35
MOD_QRY_D                     D8000            2.3           2.41           2.21
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000           1.62           1.48           1.49
RSF_QRY                       D2000           1.48           1.49           1.57
RSF_QRY                       D4000           1.54           1.57           1.57
RSF_QRY                       D8000           1.57           1.58           1.57
RSF_TMP                       D1000           1.23           1.48           1.49
RSF_TMP                       D2000           1.48           1.49           1.55
RSF_TMP                       D4000           1.54           1.55           1.56
RSF_TMP                       D8000           1.53           1.57           1.56

memory_used_SLICE_RATIO
=======================
Run Type                        W10            W20            W40
MOD_QRY                        2.73           2.75           2.44
MOD_QRY_D                       2.3           2.41           2.21
MTH_QRY                           1              1              1
RSF_QRY                        1.57           1.58           1.57
RSF_TMP                        1.53           1.57           1.56

buffers
=======
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000             38             68            191
MOD_QRY                       D2000             68            191            317
MOD_QRY                       D4000            175            317            569
MOD_QRY                       D8000            317            569           1074
MOD_QRY_D                     D1000             38             68            191
MOD_QRY_D                     D2000             68            191            317
MOD_QRY_D                     D4000            175            317            569
MOD_QRY_D                     D8000            317            569           1074
MTH_QRY                       D1000             38             68            191
MTH_QRY                       D2000             68            191            317
MTH_QRY                       D4000            175            317            569
MTH_QRY                       D8000            317            569           1074
RSF_QRY                       D1000          45370          91913         252211
RSF_QRY                       D2000         159913         443211         773218
RSF_QRY                       D4000         761195        1407218        2575116
RSF_QRY                       D8000        2675218        4851116        9365407
RSF_TMP                       D1000          18689          45554         103425
RSF_TMP                       D2000          46582         104461         223742
RSF_TMP                       D4000         106491         225778         471581
RSF_TMP                       D8000         229838         475661        1118395

buffers_SLICE
=============
Run Type                        W10            W20            W40
MOD_QRY                         317            569           1074
MOD_QRY_D                       317            569           1074
MTH_QRY                         317            569           1074
RSF_QRY                     2675218        4851116        9365407
RSF_TMP                      229838         475661        1118395

buffers_RATIO
=============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              1              1              1
MOD_QRY                       D2000              1              1              1
MOD_QRY                       D4000              1              1              1
MOD_QRY                       D8000              1              1              1
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000              1              1              1
MOD_QRY_D                     D4000              1              1              1
MOD_QRY_D                     D8000              1              1              1
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000        1193.95        1351.66        1320.48
RSF_QRY                       D2000        2351.66        2320.48        2439.17
RSF_QRY                       D4000        4349.69        4439.17        4525.69
RSF_QRY                       D8000        8439.17        8525.69        8720.12
RSF_TMP                       D1000         491.82         669.91         541.49
RSF_TMP                       D2000         685.03         546.92         705.81
RSF_TMP                       D4000         608.52         712.23         828.79
RSF_TMP                       D8000         725.04         835.96        1041.34

buffers_SLICE_RATIO
===================
Run Type                        W10            W20            W40
MOD_QRY                           1              1              1
MOD_QRY_D                         1              1              1
MTH_QRY                           1              1              1
RSF_QRY                     8439.17        8525.69        8720.12
RSF_TMP                      725.04         835.96        1041.34

disk_reads
==========
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              0              0              0
MOD_QRY                       D2000              0              0              0
MOD_QRY                       D4000              0              0              0
MOD_QRY                       D8000              0              0              0
MOD_QRY_D                     D1000              0              0              0
MOD_QRY_D                     D2000              0              0              0
MOD_QRY_D                     D4000              0              0              0
MOD_QRY_D                     D8000              0              0              0
MTH_QRY                       D1000              0              0              0
MTH_QRY                       D2000              0              0              0
MTH_QRY                       D4000              0              0              0
MTH_QRY                       D8000              0              0              0
RSF_QRY                       D1000              0              0              0
RSF_QRY                       D2000              0              0              0
RSF_QRY                       D4000              0              0              0
RSF_QRY                       D8000              0              0              0
RSF_TMP                       D1000              0              0              0
RSF_TMP                       D2000              0              0              0
RSF_TMP                       D4000              0              0              0
RSF_TMP                       D8000              0              0              0

disk_reads_SLICE
================
Run Type                        W10            W20            W40
MOD_QRY                           0              0              0
MOD_QRY_D                         0              0              0
MTH_QRY                           0              0              0
RSF_QRY                           0              0              0
RSF_TMP                           0              0              0

disk_reads_RATIO
================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              0              0              0
MOD_QRY                       D2000              0              0              0
MOD_QRY                       D4000              0              0              0
MOD_QRY                       D8000              0              0              0
MOD_QRY_D                     D1000              0              0              0
MOD_QRY_D                     D2000              0              0              0
MOD_QRY_D                     D4000              0              0              0
MOD_QRY_D                     D8000              0              0              0
MTH_QRY                       D1000              0              0              0
MTH_QRY                       D2000              0              0              0
MTH_QRY                       D4000              0              0              0
MTH_QRY                       D8000              0              0              0
RSF_QRY                       D1000              0              0              0
RSF_QRY                       D2000              0              0              0
RSF_QRY                       D4000              0              0              0
RSF_QRY                       D8000              0              0              0
RSF_TMP                       D1000              0              0              0
RSF_TMP                       D2000              0              0              0
RSF_TMP                       D4000              0              0              0
RSF_TMP                       D8000              0              0              0

disk_reads_SLICE_RATIO
======================
Run Type                        W10            W20            W40
MOD_QRY                           0              0              0
MOD_QRY_D                         0              0              0
MTH_QRY                           0              0              0
RSF_QRY                           0              0              0
RSF_TMP                           0              0              0

disk_writes
===========
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              0              0              0
MOD_QRY                       D2000              0              0              0
MOD_QRY                       D4000              0              0              0
MOD_QRY                       D8000              0              0              0
MOD_QRY_D                     D1000              0              0              0
MOD_QRY_D                     D2000              0              0              0
MOD_QRY_D                     D4000              0              0              0
MOD_QRY_D                     D8000              0              0              0
MTH_QRY                       D1000              0              0              0
MTH_QRY                       D2000              0              0              0
MTH_QRY                       D4000              0              0              0
MTH_QRY                       D8000              0              0              0
RSF_QRY                       D1000              0              0              0
RSF_QRY                       D2000              0              0              0
RSF_QRY                       D4000              0              0              0
RSF_QRY                       D8000              0              0              0
RSF_TMP                       D1000              0              0              0
RSF_TMP                       D2000              0              0              0
RSF_TMP                       D4000              0              0              0
RSF_TMP                       D8000              0              0              0

disk_writes_SLICE
=================
Run Type                        W10            W20            W40
MOD_QRY                           0              0              0
MOD_QRY_D                         0              0              0
MTH_QRY                           0              0              0
RSF_QRY                           0              0              0
RSF_TMP                           0              0              0

disk_writes_RATIO
=================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              0              0              0
MOD_QRY                       D2000              0              0              0
MOD_QRY                       D4000              0              0              0
MOD_QRY                       D8000              0              0              0
MOD_QRY_D                     D1000              0              0              0
MOD_QRY_D                     D2000              0              0              0
MOD_QRY_D                     D4000              0              0              0
MOD_QRY_D                     D8000              0              0              0
MTH_QRY                       D1000              0              0              0
MTH_QRY                       D2000              0              0              0
MTH_QRY                       D4000              0              0              0
MTH_QRY                       D8000              0              0              0
RSF_QRY                       D1000              0              0              0
RSF_QRY                       D2000              0              0              0
RSF_QRY                       D4000              0              0              0
RSF_QRY                       D8000              0              0              0
RSF_TMP                       D1000              0              0              0
RSF_TMP                       D2000              0              0              0
RSF_TMP                       D4000              0              0              0
RSF_TMP                       D8000              0              0              0

disk_writes_SLICE_RATIO
=======================
Run Type                        W10            W20            W40
MOD_QRY                           0              0              0
MOD_QRY_D                         0              0              0
MTH_QRY                           0              0              0
RSF_QRY                           0              0              0
RSF_TMP                           0              0              0

tempseg_size
============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000
MOD_QRY                       D2000
MOD_QRY                       D4000
MOD_QRY                       D8000
MOD_QRY_D                     D1000
MOD_QRY_D                     D2000
MOD_QRY_D                     D4000
MOD_QRY_D                     D8000
MTH_QRY                       D1000
MTH_QRY                       D2000
MTH_QRY                       D4000
MTH_QRY                       D8000
RSF_QRY                       D1000
RSF_QRY                       D2000
RSF_QRY                       D4000
RSF_QRY                       D8000
RSF_TMP                       D1000
RSF_TMP                       D2000
RSF_TMP                       D4000
RSF_TMP                       D8000

tempseg_size_SLICE
==================
Run Type                        W10            W20            W40
MOD_QRY
MOD_QRY_D
MTH_QRY
RSF_QRY
RSF_TMP

tempseg_size_RATIO
==================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000
MOD_QRY                       D2000
MOD_QRY                       D4000
MOD_QRY                       D8000
MOD_QRY_D                     D1000
MOD_QRY_D                     D2000
MOD_QRY_D                     D4000
MOD_QRY_D                     D8000
MTH_QRY                       D1000
MTH_QRY                       D2000
MTH_QRY                       D4000
MTH_QRY                       D8000
RSF_QRY                       D1000
RSF_QRY                       D2000
RSF_QRY                       D4000
RSF_QRY                       D8000
RSF_TMP                       D1000
RSF_TMP                       D2000
RSF_TMP                       D4000
RSF_TMP                       D8000

tempseg_size_SLICE_RATIO
========================
Run Type                        W10            W20            W40
MOD_QRY
MOD_QRY_D
MTH_QRY
RSF_QRY
RSF_TMP

cardinality
===========
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000          10000          20000          40000
MOD_QRY                       D2000          20000          40000          80000
MOD_QRY                       D4000          40000          80000         160000
MOD_QRY                       D8000          80000         160000         320000
MOD_QRY_D                     D1000          10000          20000          40000
MOD_QRY_D                     D2000          20000          40000          80000
MOD_QRY_D                     D4000          40000          80000         160000
MOD_QRY_D                     D8000          80000         160000         320000
MTH_QRY                       D1000          10000          20000          40000
MTH_QRY                       D2000          20000          40000          80000
MTH_QRY                       D4000          40000          80000         160000
MTH_QRY                       D8000          80000         160000         320000
RSF_QRY                       D1000          10000          20000          40000
RSF_QRY                       D2000          20000          40000          80000
RSF_QRY                       D4000          40000          80000         160000
RSF_QRY                       D8000          80000         160000         320000
RSF_TMP                       D1000            100            200            311
RSF_TMP                       D2000            197            351            968
RSF_TMP                       D4000            363            729           1819
RSF_TMP                       D8000            948           1592           3191

cardinality_SLICE
=================
Run Type                        W10            W20            W40
MOD_QRY                       80000         160000         320000
MOD_QRY_D                     80000         160000         320000
MTH_QRY                       80000         160000         320000
RSF_QRY                       80000         160000         320000
RSF_TMP                         948           1592           3191

cardinality_RATIO
=================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000            100            100         128.62
MOD_QRY                       D2000         101.52         113.96          82.64
MOD_QRY                       D4000         110.19         109.74          87.96
MOD_QRY                       D8000          84.39          100.5         100.28
MOD_QRY_D                     D1000            100            100         128.62
MOD_QRY_D                     D2000         101.52         113.96          82.64
MOD_QRY_D                     D4000         110.19         109.74          87.96
MOD_QRY_D                     D8000          84.39          100.5         100.28
MTH_QRY                       D1000            100            100         128.62
MTH_QRY                       D2000         101.52         113.96          82.64
MTH_QRY                       D4000         110.19         109.74          87.96
MTH_QRY                       D8000          84.39          100.5         100.28
RSF_QRY                       D1000            100            100         128.62
RSF_QRY                       D2000         101.52         113.96          82.64
RSF_QRY                       D4000         110.19         109.74          87.96
RSF_QRY                       D8000          84.39          100.5         100.28
RSF_TMP                       D1000              1              1              1
RSF_TMP                       D2000              1              1              1
RSF_TMP                       D4000              1              1              1
RSF_TMP                       D8000              1              1              1

cardinality_SLICE_RATIO
=======================
Run Type                        W10            W20            W40
MOD_QRY                       84.39          100.5         100.28
MOD_QRY_D                     84.39          100.5         100.28
MTH_QRY                       84.39          100.5         100.28
RSF_QRY                       84.39          100.5         100.28
RSF_TMP                           1              1              1

output_rows
===========
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000          10000          20000          40000
MOD_QRY                       D2000          20000          40000          80000
MOD_QRY                       D4000          40000          80000         160000
MOD_QRY                       D8000          80000         160000         320000
MOD_QRY_D                     D1000          10000          20000          40000
MOD_QRY_D                     D2000          20000          40000          80000
MOD_QRY_D                     D4000          40000          80000         160000
MOD_QRY_D                     D8000          80000         160000         320000
MTH_QRY                       D1000          10000          20000          40000
MTH_QRY                       D2000          20000          40000          80000
MTH_QRY                       D4000          40000          80000         160000
MTH_QRY                       D8000          80000         160000         320000
RSF_QRY                       D1000       10000000       20000000       40000000
RSF_QRY                       D2000       40000000       80000000      160000000
RSF_QRY                       D4000      160000000      320000000      640000000
RSF_QRY                       D8000      640000000     1280000000     2560000000
RSF_TMP                       D1000          10000          20000          40000
RSF_TMP                       D2000          20000          40000          80000
RSF_TMP                       D4000          40000          80000         160000
RSF_TMP                       D8000          80000         160000         320000

output_rows_SLICE
=================
Run Type                        W10            W20            W40
MOD_QRY                       80000         160000         320000
MOD_QRY_D                     80000         160000         320000
MTH_QRY                       80000         160000         320000
RSF_QRY                   640000000     1280000000     2560000000
RSF_TMP                       80000         160000         320000

output_rows_RATIO
=================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              1              1              1
MOD_QRY                       D2000              1              1              1
MOD_QRY                       D4000              1              1              1
MOD_QRY                       D8000              1              1              1
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000              1              1              1
MOD_QRY_D                     D4000              1              1              1
MOD_QRY_D                     D8000              1              1              1
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000           1000           1000           1000
RSF_QRY                       D2000           2000           2000           2000
RSF_QRY                       D4000           4000           4000           4000
RSF_QRY                       D8000           8000           8000           8000
RSF_TMP                       D1000              1              1              1
RSF_TMP                       D2000              1              1              1
RSF_TMP                       D4000              1              1              1
RSF_TMP                       D8000              1              1              1

output_rows_SLICE_RATIO
=======================
Run Type                        W10            W20            W40
MOD_QRY                           1              1              1
MOD_QRY_D                         1              1              1
MTH_QRY                           1              1              1
RSF_QRY                        8000           8000           8000
RSF_TMP                           1              1              1

cardinality_error
=================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           9895          19791          39578
MOD_QRY                       D2000          19795          39589          79171
MOD_QRY                       D4000          39594          79185         158375
MOD_QRY                       D8000          79192         158382         316771
MOD_QRY_D                     D1000           9895          19791          39578
MOD_QRY_D                     D2000          19795          39589          79171
MOD_QRY_D                     D4000          39594          79185         158375
MOD_QRY_D                     D8000          79192         158382         316771
MTH_QRY                       D1000           9895          19791          39578
MTH_QRY                       D2000          19795          39589          79171
MTH_QRY                       D4000          39594          79185         158375
MTH_QRY                       D8000          79192         158382         316771
RSF_QRY                       D1000           9990          19989          39989
RSF_QRY                       D2000          20010          39980          79979
RSF_QRY                       D4000         120010          80020         159960
RSF_QRY                       D8000         560010         480020         320040
RSF_TMP                       D1000         990010        3980020       12400040
RSF_TMP                       D2000        3920010       14000020       77360040
RSF_TMP                       D4000       14480010       58240020      290880040
RSF_TMP                       D8000       75760010      254560020     1020800040

cardinality_error_SLICE
=======================
Run Type                        W10            W20            W40
MOD_QRY                       79192         158382         316771
MOD_QRY_D                     79192         158382         316771
MTH_QRY                       79192         158382         316771
RSF_QRY                      560010         480020         320040
RSF_TMP                    75760010      254560020     1020800040

cardinality_error_RATIO
=======================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              1              1              1
MOD_QRY                       D2000              1              1              1
MOD_QRY                       D4000              1              1              1
MOD_QRY                       D8000              1              1              1
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000              1              1              1
MOD_QRY_D                     D4000              1              1              1
MOD_QRY_D                     D8000              1              1              1
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000           1.01           1.01           1.01
RSF_QRY                       D2000           1.01           1.01           1.01
RSF_QRY                       D4000           3.03           1.01           1.01
RSF_QRY                       D8000           7.07           3.03           1.01
RSF_TMP                       D1000         100.05          201.1         313.31
RSF_TMP                       D2000         198.03         353.63         977.13
RSF_TMP                       D4000         365.71         735.49        1836.65
RSF_TMP                       D8000         956.66        1607.25        3222.52

cardinality_error_SLICE_RATIO
=============================
Run Type                        W10            W20            W40
MOD_QRY                           1              1              1
MOD_QRY_D                         1              1              1
MTH_QRY                           1              1              1
RSF_QRY                        7.07           3.03           1.01
RSF_TMP                      956.66        1607.25        3222.52
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'sorts (rows)' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' || Max (CASE point_wide WH
EN 1 THEN f_real END) || '","' || Max (CASE point_wide WHEN 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name, point_deep, size_deep)
 ORDER BY query_name, point_deep


sorts (rows)
============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000          20000          40000          80000
MOD_QRY                       D2000          40000          80000         160000
MOD_QRY                       D4000          80000         160000         320000
MOD_QRY                       D8000         160000         320000         640000
MOD_QRY_D                     D1000          30000          60000         120000
MOD_QRY_D                     D2000          60000         120000         240000
MOD_QRY_D                     D4000         120000         240000         480000
MOD_QRY_D                     D8000         240000         480000         960000
MTH_QRY                       D1000          10105          20209          40422
MTH_QRY                       D2000          20205          40411          80829
MTH_QRY                       D4000          40406          80815         161625
MTH_QRY                       D8000          80808         161618         323229
RSF_QRY                       D1000       10040000       20080000       40160000
RSF_QRY                       D2000       40080000       80160000      160320000
RSF_QRY                       D4000      160160000      320320000      640640000
RSF_QRY                       D8000      640320000     1280640000     2561280000
RSF_TMP                       D1000          60000         111472         185792
RSF_TMP                       D2000         113046         189128         359330
RSF_TMP                       D4000         190102         350112         677204
RSF_TMP                       D8000         359798         672820        1312532

sorts (rows)_SLICE
==================
Run Type                        W10            W20            W40
MOD_QRY                      160000         320000         640000
MOD_QRY_D                    240000         480000         960000
MTH_QRY                       80808         161618         323229
RSF_QRY                   640320000     1280640000     2561280000
RSF_TMP                      359798         672820        1312532

sorts (rows)_RATIO
==================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           1.98           1.98           1.98
MOD_QRY                       D2000           1.98           1.98           1.98
MOD_QRY                       D4000           1.98           1.98           1.98
MOD_QRY                       D8000           1.98           1.98           1.98
MOD_QRY_D                     D1000           2.97           2.97           2.97
MOD_QRY_D                     D2000           2.97           2.97           2.97
MOD_QRY_D                     D4000           2.97           2.97           2.97
MOD_QRY_D                     D8000           2.97           2.97           2.97
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000         993.57         993.62         993.52
RSF_QRY                       D2000        1983.67        1983.62        1983.45
RSF_QRY                       D4000        3963.77        3963.62        3963.74
RSF_QRY                       D8000        7923.97        7923.87        7924.04
RSF_TMP                       D1000           5.94           5.52            4.6
RSF_TMP                       D2000           5.59           4.68           4.45
RSF_TMP                       D4000            4.7           4.33           4.19
RSF_TMP                       D8000           4.45           4.16           4.06

sorts (rows)_SLICE_RATIO
========================
Run Type                        W10            W20            W40
MOD_QRY                        1.98           1.98           1.98
MOD_QRY_D                      2.97           2.97           2.97
MTH_QRY                           1              1              1
RSF_QRY                     7923.97        7923.87        7924.04
RSF_TMP                        4.45           4.16           4.06

Top Stats
=========
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'temp space allocated (bytes)' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' || Max (CA
SE point_wide WHEN 1 THEN f_real END) || '","' || Max (CASE point_wide WHEN 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name, point_
deep, size_deep) ORDER BY query_name, point_deep


temp space allocated (bytes)
============================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              0              0              0
MOD_QRY                       D2000              0              0              0
MOD_QRY                       D4000              0              0              0
MOD_QRY                       D8000              0              0              0
MOD_QRY_D                     D1000              0              0              0
MOD_QRY_D                     D2000              0              0              0
MOD_QRY_D                     D4000              0              0              0
MOD_QRY_D                     D8000              0              0              0
MTH_QRY                       D1000              0              0              0
MTH_QRY                       D2000              0              0              0
MTH_QRY                       D4000              0              0              0
MTH_QRY                       D8000              0              0              0
RSF_QRY                       D1000              0              0              0
RSF_QRY                       D2000              0              0              0
RSF_QRY                       D4000              0              0              0
RSF_QRY                       D8000              0              0              0
RSF_TMP                       D1000        2097152        2097152        4194304
RSF_TMP                       D2000        2097152        4194304        6291456
RSF_TMP                       D4000        4194304        6291456       11534336
RSF_TMP                       D8000        6291456       11534336       22020096

temp space allocated (bytes)_SLICE
==================================
Run Type                        W10            W20            W40
MOD_QRY                           0              0              0
MOD_QRY_D                         0              0              0
MTH_QRY                           0              0              0
RSF_QRY                           0              0              0
RSF_TMP                     6291456       11534336       22020096

temp space allocated (bytes)_RATIO
==================================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              0              0              0
MOD_QRY                       D2000              0              0              0
MOD_QRY                       D4000              0              0              0
MOD_QRY                       D8000              0              0              0
MOD_QRY_D                     D1000              0              0              0
MOD_QRY_D                     D2000              0              0              0
MOD_QRY_D                     D4000              0              0              0
MOD_QRY_D                     D8000              0              0              0
MTH_QRY                       D1000              0              0              0
MTH_QRY                       D2000              0              0              0
MTH_QRY                       D4000              0              0              0
MTH_QRY                       D8000              0              0              0
RSF_QRY                       D1000              0              0              0
RSF_QRY                       D2000              0              0              0
RSF_QRY                       D4000              0              0              0
RSF_QRY                       D8000              0              0              0
RSF_TMP                       D1000  2097152000000  2097152000000  4194304000000
RSF_TMP                       D2000  2097152000000  4194304000000  6291456000000
RSF_TMP                       D4000  4194304000000  6291456000000 11534336000000
RSF_TMP                       D8000  6291456000000 11534336000000 22020096000000

temp space allocated (bytes)_SLICE_RATIO
========================================
Run Type                        W10            W20            W40
MOD_QRY                           0              0              0
MOD_QRY_D                         0              0              0
MTH_QRY                           0              0              0
RSF_QRY                           0              0              0
RSF_TMP               6291456000000 11534336000000 22020096000000
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'process queue reference' AND stat_type = 'LATCH') SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' || Max (CASE p
oint_wide WHEN 1 THEN f_real END) || '","' || Max (CASE point_wide WHEN 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name, point_deep
, size_deep) ORDER BY query_name, point_deep


process queue reference
=======================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           1042           2104           3442
MOD_QRY                       D2000          27017           6858          14426
MOD_QRY                       D4000           9012          70058          92323
MOD_QRY                       D8000          67269         128878         384220
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000              1              1              1
MOD_QRY_D                     D4000              1              1              1
MOD_QRY_D                     D8000              1              1           1046
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000              1              1           1044
RSF_QRY                       D2000           1039           2093           4443
RSF_QRY                       D4000           3385           6487          33129
RSF_QRY                       D8000          26168          68317          98338
RSF_TMP                       D1000              1              1              1
RSF_TMP                       D2000              1              1              1
RSF_TMP                       D4000              1              1              1
RSF_TMP                       D8000              1              1              1

process queue reference_SLICE
=============================
Run Type                        W10            W20            W40
MOD_QRY                       67269         128878         384220
MOD_QRY_D                         1              1           1046
MTH_QRY                           1              1              1
RSF_QRY                       26168          68317          98338
RSF_TMP                           1              1              1

process queue reference_RATIO
=============================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           1042           2104           3442
MOD_QRY                       D2000          27017           6858          14426
MOD_QRY                       D4000           9012          70058          92323
MOD_QRY                       D8000          67269         128878         384220
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000              1              1              1
MOD_QRY_D                     D4000              1              1              1
MOD_QRY_D                     D8000              1              1           1046
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000              1              1           1044
RSF_QRY                       D2000           1039           2093           4443
RSF_QRY                       D4000           3385           6487          33129
RSF_QRY                       D8000          26168          68317          98338
RSF_TMP                       D1000              1              1              1
RSF_TMP                       D2000              1              1              1
RSF_TMP                       D4000              1              1              1
RSF_TMP                       D8000              1              1              1

process queue reference_SLICE_RATIO
===================================
Run Type                        W10            W20            W40
MOD_QRY                       67269         128878         384220
MOD_QRY_D                         1              1           1046
MTH_QRY                           1              1              1
RSF_QRY                       26168          68317          98338
RSF_TMP                           1              1              1
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'table scan disk non-IMC rows gotten' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' ||
Max (CASE point_wide WHEN 1 THEN f_real END) || '","' || Max (CASE point_wide WHEN 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name,
 point_deep, size_deep) ORDER BY query_name, point_deep


table scan disk non-IMC rows gotten
===================================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000          10000          20000          40000
MOD_QRY                       D2000          20000          40000          80000
MOD_QRY                       D4000          40000          80000         160000
MOD_QRY                       D8000          80000         160000         320000
MOD_QRY_D                     D1000          10000          20000          40000
MOD_QRY_D                     D2000          20000          40000          80000
MOD_QRY_D                     D4000          40000          80000         160000
MOD_QRY_D                     D8000          80000         160000         320000
MTH_QRY                       D1000          10000          20000          40000
MTH_QRY                       D2000          20000          40000          80000
MTH_QRY                       D4000          40000          80000         160000
MTH_QRY                       D8000          80000         160000         320000
RSF_QRY                       D1000       10010000       20020000       40040000
RSF_QRY                       D2000       40020000       80040000      160080000
RSF_QRY                       D4000      160040000      320080000      640160000
RSF_QRY                       D8000      640080000     1280160000     2560320000
RSF_TMP                       D1000          30000          20000          40000
RSF_TMP                       D2000          20000          40000          80000
RSF_TMP                       D4000          40000          80000         160000
RSF_TMP                       D8000          80000         160000         320000

table scan disk non-IMC rows gotten_SLICE
=========================================
Run Type                        W10            W20            W40
MOD_QRY                       80000         160000         320000
MOD_QRY_D                     80000         160000         320000
MTH_QRY                       80000         160000         320000
RSF_QRY                   640080000     1280160000     2560320000
RSF_TMP                       80000         160000         320000

table scan disk non-IMC rows gotten_RATIO
=========================================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000              1              1              1
MOD_QRY                       D2000              1              1              1
MOD_QRY                       D4000              1              1              1
MOD_QRY                       D8000              1              1              1
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000              1              1              1
MOD_QRY_D                     D4000              1              1              1
MOD_QRY_D                     D8000              1              1              1
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000           1001           1001           1001
RSF_QRY                       D2000           2001           2001           2001
RSF_QRY                       D4000           4001           4001           4001
RSF_QRY                       D8000           8001           8001           8001
RSF_TMP                       D1000              3              1              1
RSF_TMP                       D2000              1              1              1
RSF_TMP                       D4000              1              1              1
RSF_TMP                       D8000              1              1              1

table scan disk non-IMC rows gotten_SLICE_RATIO
===============================================
Run Type                        W10            W20            W40
MOD_QRY                           1              1              1
MOD_QRY_D                         1              1              1
MTH_QRY                           1              1              1
RSF_QRY                        8001           8001           8001
RSF_TMP                           1              1              1
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'sorts (rows)' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' || Max (CASE point_wide WH
EN 1 THEN f_real END) || '","' || Max (CASE point_wide WHEN 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name, point_deep, size_deep)
 ORDER BY query_name, point_deep


sorts (rows)
============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000          20000          40000          80000
MOD_QRY                       D2000          40000          80000         160000
MOD_QRY                       D4000          80000         160000         320000
MOD_QRY                       D8000         160000         320000         640000
MOD_QRY_D                     D1000          30000          60000         120000
MOD_QRY_D                     D2000          60000         120000         240000
MOD_QRY_D                     D4000         120000         240000         480000
MOD_QRY_D                     D8000         240000         480000         960000
MTH_QRY                       D1000          10105          20209          40422
MTH_QRY                       D2000          20205          40411          80829
MTH_QRY                       D4000          40406          80815         161625
MTH_QRY                       D8000          80808         161618         323229
RSF_QRY                       D1000       10040000       20080000       40160000
RSF_QRY                       D2000       40080000       80160000      160320000
RSF_QRY                       D4000      160160000      320320000      640640000
RSF_QRY                       D8000      640320000     1280640000     2561280000
RSF_TMP                       D1000          60000         111472         185792
RSF_TMP                       D2000         113046         189128         359330
RSF_TMP                       D4000         190102         350112         677204
RSF_TMP                       D8000         359798         672820        1312532

sorts (rows)_SLICE
==================
Run Type                        W10            W20            W40
MOD_QRY                      160000         320000         640000
MOD_QRY_D                    240000         480000         960000
MTH_QRY                       80808         161618         323229
RSF_QRY                   640320000     1280640000     2561280000
RSF_TMP                      359798         672820        1312532

sorts (rows)_RATIO
==================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           1.98           1.98           1.98
MOD_QRY                       D2000           1.98           1.98           1.98
MOD_QRY                       D4000           1.98           1.98           1.98
MOD_QRY                       D8000           1.98           1.98           1.98
MOD_QRY_D                     D1000           2.97           2.97           2.97
MOD_QRY_D                     D2000           2.97           2.97           2.97
MOD_QRY_D                     D4000           2.97           2.97           2.97
MOD_QRY_D                     D8000           2.97           2.97           2.97
MTH_QRY                       D1000              1              1              1
MTH_QRY                       D2000              1              1              1
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1              1
RSF_QRY                       D1000         993.57         993.62         993.52
RSF_QRY                       D2000        1983.67        1983.62        1983.45
RSF_QRY                       D4000        3963.77        3963.62        3963.74
RSF_QRY                       D8000        7923.97        7923.87        7924.04
RSF_TMP                       D1000           5.94           5.52            4.6
RSF_TMP                       D2000           5.59           4.68           4.45
RSF_TMP                       D4000            4.7           4.33           4.19
RSF_TMP                       D8000           4.45           4.16           4.06

sorts (rows)_SLICE_RATIO
========================
Run Type                        W10            W20            W40
MOD_QRY                        1.98           1.98           1.98
MOD_QRY_D                      2.97           2.97           2.97
MTH_QRY                           1              1              1
RSF_QRY                     7923.97        7923.87        7924.04
RSF_TMP                        4.45           4.16           4.06
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'logical read bytes from cache' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' || Max (C
ASE point_wide WHEN 1 THEN f_real END) || '","' || Max (CASE point_wide WHEN 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name, point
_deep, size_deep) ORDER BY query_name, point_deep


logical read bytes from cache
=============================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000       16826368       17080320        4792320
MOD_QRY                       D2000       15958016       17186816        5472256
MOD_QRY                       D4000       17334272       18071552        8077312
MOD_QRY                       D8000       19701760        8036352       12050432
MOD_QRY_D                     D1000       16089088       16539648        4792320
MOD_QRY_D                     D2000       17178624       17154048        5873664
MOD_QRY_D                     D4000       17670144       18694144        8282112
MOD_QRY_D                     D8000       18513920        8011776       12124160
MTH_QRY                       D1000       16670720       16777216        5431296
MTH_QRY                       D2000       17211392       17596416        5898240
MTH_QRY                       D4000       17063936       18145280        7847936
MTH_QRY                       D8000       18399232        7299072       12722176
RSF_QRY                       D1000      387252224      768524288     2070929408
RSF_QRY                       D2000     1325637632     3647430656     6337478656
RSF_QRY                       D4000     6252453888    11544403968    21098643456
RSF_QRY                       D8000    21930770432    39743684608    76724371456
RSF_TMP                       D1000      185991168      430202880      956489728
RSF_TMP                       D2000      431144960      952655872     2049122304
RSF_TMP                       D4000      955179008     2024398848     4332290048
RSF_TMP                       D8000     2030608384     4234272768    10213171200

logical read bytes from cache_SLICE
===================================
Run Type                        W10            W20            W40
MOD_QRY                    19701760        8036352       12050432
MOD_QRY_D                  18513920        8011776       12124160
MTH_QRY                    18399232        7299072       12722176
RSF_QRY                 21930770432    39743684608    76724371456
RSF_TMP                  2030608384     4234272768    10213171200

logical read bytes from cache_RATIO
===================================
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           1.05           1.03              1
MOD_QRY                       D2000              1              1              1
MOD_QRY                       D4000           1.02              1           1.03
MOD_QRY                       D8000           1.07            1.1              1
MOD_QRY_D                     D1000              1              1              1
MOD_QRY_D                     D2000           1.08              1           1.07
MOD_QRY_D                     D4000           1.04           1.03           1.06
MOD_QRY_D                     D8000           1.01            1.1           1.01
MTH_QRY                       D1000           1.04           1.01           1.13
MTH_QRY                       D2000           1.08           1.03           1.08
MTH_QRY                       D4000              1              1              1
MTH_QRY                       D8000              1              1           1.06
RSF_QRY                       D1000          24.07          46.47         432.14
RSF_QRY                       D2000          83.07         212.63        1158.11
RSF_QRY                       D4000         366.41         638.82        2688.43
RSF_QRY                       D8000        1191.94        5445.03        6366.94
RSF_TMP                       D1000          11.56          26.01         199.59
RSF_TMP                       D2000          27.02          55.54         374.46
RSF_TMP                       D4000          55.98         112.02         552.03
RSF_TMP                       D8000         110.36         580.11         847.54

logical read bytes from cache_SLICE_RATIO
=========================================
Run Type                        W10            W20            W40
MOD_QRY                        1.07            1.1              1
MOD_QRY_D                      1.01            1.1           1.01
MTH_QRY                           1              1           1.06
RSF_QRY                     1191.94        5445.03        6366.94
RSF_TMP                      110.36         580.11         847.54
WITH wit AS (SELECT query_name, point_deep, size_deep, point_wide, stat_val f_real, Round (stat_val / Greatest (Min (stat_val) OVER (PARTITION BY point_deep, point_wide), 0.000001), 2) f_ratio FROM be
nch_run_v$stats_v WHERE stat_name = 'redo size' AND stat_type = 'STAT') SELECT text FROM (SELECT query_name, point_deep, '"' || query_name || '","D' || size_deep || '","' || Max (CASE point_wide WHEN
1 THEN f_real END) || '","' || Max (CASE point_wide WHEN 2 THEN f_real END) || '","' || Max (CASE point_wide WHEN 3 THEN f_real END) || '"' text FROM wit GROUP BY query_name, point_deep, size_deep) OR
DER BY query_name, point_deep


redo size
=========
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000         385788         386152         344756
MOD_QRY                       D2000         325816         327056         344380
MOD_QRY                       D4000         346144         325916         366016
MOD_QRY                       D8000         390064         346140         380912
MOD_QRY_D                     D1000         345476         347244         379896
MOD_QRY_D                     D2000         353168         343584         380304
MOD_QRY_D                     D4000         382596         381004         333460
MOD_QRY_D                     D8000         363040         364440         347928
MTH_QRY                       D1000         383860         381604         369580
MTH_QRY                       D2000         386196         380396         348136
MTH_QRY                       D4000         343428         342680         346828
MTH_QRY                       D8000         361868         324824         369596
RSF_QRY                       D1000         343244         343360         392176
RSF_QRY                       D2000         343888         351672         380396
RSF_QRY                       D4000         384680         351804         380492
RSF_QRY                       D8000         324972         348752         343920
RSF_TMP                       D1000        1011996        1761236        3389236
RSF_TMP                       D2000        1709376        3217776        6522596
RSF_TMP                       D4000        3027732        6021064       12715036
RSF_TMP                       D8000        5711344       11683492       25113080

redo size_SLICE
===============
Run Type                        W10            W20            W40
MOD_QRY                      390064         346140         380912
MOD_QRY_D                    363040         364440         347928
MTH_QRY                      361868         324824         369596
RSF_QRY                      324972         348752         343920
RSF_TMP                     5711344       11683492       25113080

redo size_RATIO
===============
Run Type                      Depth            W10            W20            W40
MOD_QRY                       D1000           1.12           1.12              1
MOD_QRY                       D2000              1              1              1
MOD_QRY                       D4000           1.01              1            1.1
MOD_QRY                       D8000            1.2           1.07           1.11
MOD_QRY_D                     D1000           1.01           1.01            1.1
MOD_QRY_D                     D2000           1.08           1.05            1.1
MOD_QRY_D                     D4000           1.11           1.17              1
MOD_QRY_D                     D8000           1.12           1.12           1.01
MTH_QRY                       D1000           1.12           1.11           1.07
MTH_QRY                       D2000           1.19           1.16           1.01
MTH_QRY                       D4000              1           1.05           1.04
MTH_QRY                       D8000           1.11              1           1.07
RSF_QRY                       D1000              1              1           1.14
RSF_QRY                       D2000           1.06           1.08            1.1
RSF_QRY                       D4000           1.12           1.08           1.14
RSF_QRY                       D8000              1           1.07              1
RSF_TMP                       D1000           2.95           5.13           9.83
RSF_TMP                       D2000           5.25           9.84          18.94
RSF_TMP                       D4000           8.82          18.47          38.13
RSF_TMP                       D8000          17.57          35.97          73.02

redo size_SLICE_RATIO
=====================
Run Type                        W10            W20            W40
MOD_QRY                         1.2           1.07           1.11
MOD_QRY_D                      1.12           1.12           1.01
MTH_QRY                        1.11              1           1.07
RSF_QRY                           1           1.07              1
RSF_TMP                       17.57          35.97          73.02

Timer Set: File Writer, Constructed at 23 Nov 2016 01:03:17, written at 01:03:19
================================================================================
[Timer timed: Elapsed (per call): 0.02 (0.000015), CPU (per call): 0.02 (0.000020), calls: 1000, '***' denotes corrected line below]

Timer       Elapsed         CPU         Calls       Ela/Call       CPU/Call
-------  ----------  ----------  ------------  -------------  -------------
Lines          0.00        0.00             2        0.00000        0.00000
(Other)        2.55        2.53             1        2.54700        2.53000
-------  ----------  ----------  ------------  -------------  -------------
Total          2.55        2.53             3        0.84900        0.84333
-------  ----------  ----------  ------------  -------------  -------------

Timer Set: Top, Constructed at 22 Nov 2016 20:46:15, written at 01:03:19
========================================================================
[Timer timed: Elapsed (per call): 0.00 (0.000000), CPU (per call): 0.00 (0.000000), calls: 1000, '***' denotes corrected line below]

Timer          Elapsed         CPU         Calls       Ela/Call       CPU/Call
----------  ----------  ----------  ------------  -------------  -------------
Setup Data       78.31       58.41            12        6.52550        4.86750
Querying     15,341.19   15,339.75            12    1,278.43267    1,278.31250
(Other)           4.63        4.51             1        4.62500        4.51000
----------  ----------  ----------  ------------  -------------  -------------
Total        15,424.12   15,402.67            25      616.96492      616.10680
----------  ----------  ----------  ------------  -------------  -------------
Successfully completed

7458 rows selected.

Elapsed: 00:00:00.53
SQL> 
SQL> SELECT 'End: ' || To_Char(SYSDATE,'DD-MON-YYYY HH24:MI:SS') FROM DUAL
  2  /

'END:'||TO_CHAR(SYSDATE,'
-------------------------
End: 23-NOV-2016 01:03:20

Elapsed: 00:00:00.00
SQL> SPOOL OFF






SQL for the Balanced Number Partitioning Problem

I noticed a post on AskTom recently that referred to an SQL solution to a version of the so-called Bin Fitting problem, where even distribution is the aim. The solution, How do I solve a Bin Fitting problem in an SQL statement?, uses Oracle's Model clause, and, as the poster of the link observed, has the drawback that the number of bins is embedded in the query structure. I thought it might be interesting to find solutions without that drawback, so that the number of bins could be passed to the query as a bind variable. I came up with three solutions using different techniques, starting here.

An interesting article in American Scientist, The Easiest Hard Problem, notes that the problem is NP-complete, or certifiably hard, but that simple greedy heuristics often produce a good solution, including one used by schoolboys to pick football teams. The article uses the more descriptive term for the problem of balanced number partitioning, and notes some practical applications. The Model clause solution implements a multiple-bin version of the main Greedy Algorithm, while my non-Model SQL solutions implement variants of it that allow other techniques to be used, one of which is very simple and fast: this implements the team picking heuristic for multiple teams.

Another poster, Stew Ashton, suggested a simple change to my Model solution that improved performance, and I use this modified version here. He also suggested that using PL/SQL might be faster, and I have added my own simple PL/SQL implementation of the Greedy Algorithm, as well as a second version of the recursive subquery factoring solution that performs better than the first.

This article explains the solutions, considers two simple examples to illustrate them, and reports on performance testing across dimensions of number of items and number of bins. These show that the solutions exhibit either linear or quadratic variation in execution time with number of items, and some methods are sensitive to the number of bins while others are not.

After I had posted my solutions on the AskTom thread, I came across a thread on OTN, need help to resolve this issue, that requested a solution to a form of bin fitting problem where the bins have fixed capacity and the number of bins required must be determined. I realised that my solutions could easily be extended to add that feature, and posted extended versions of two of the solutions there. I have added a section here for this.

Updated, 5 June 2013: added Model and RSF diagrams

Update, 18 November 2017: I have now put scripts for setting up data and running the queries in a new schema onto my GitHub project: Brendan's repo for interesting SQL. Note that I have not included the minor changes needed for the extended problem where findiing the number of bins is part of the problem.

Greedy Algorithm Variants

Say there are N bins and M items.

Greedy Algorithm (GDY)
Set bin sizes zero
Loop over items in descending order of size

  • Add item to current smallest bin
  • Calculate new bin size

End Loop

Greedy Algorithm with Batched Rebalancing (GBR)
Set bin sizes zero
Loop over items in descending order of size in batches of N items

  • Assign batch to N bins, with bins in ascending order of size
  • Calculate new bin sizes

End Loop

Greedy Algorithm with No Rebalancing - or, Team Picking Algorithm (TPA)
Assign items to bins cyclically by bin sequence in descending order of item size

Two Examples

Example: Four Items
Binfit, v1.3 - 4-items
Here we see that the Greedy Algorithm finds the perfect solution, with no difference in bin size, but the two variants have a difference of two.
Example: Six Items
Binfit, v1.3 - 6-items
Here we see that none of the algorithms finds the perfect solution. Both the standard Greedy Algorithm and its batched variant give a difference of two, while the variant without rebalancing gives a difference of four.

SQL Solutions

Original Model for GDY
See the link above for the SQL for the problem with three bins only.

The author has two measures for each bin and implements the GDY algorithm using CASE expressions and aggregation within the rules. The idea is to iterate over the items in descending order of size, setting the item bin to the bin with current smallest value. I use the word 'bin' for his 'bucket'. Some notes:

  • Dimension by row number, ordered by item value
  • Add measures for the iteration, it, and number of iterations required, counter
  • Add measures for the bin name, bucket_name, and current minimum bin value, min_tmp (only first entry used)
  • Add measures for each item bin value, bucket_1-3, being the item value if it's in that bin, else zero
  • Add measures for each bin running sum, pbucket_1-3, being the current value of each bin (only first two entries used)
  • The current minimum bin value, bin_tmp[1] is computed as the least of the running sums
  • The current item bin value is set to the item value for the bin whose value matches the minimum just computed, and null for the others
  • The current bin name is set similarly to be the bin matching the minimum
  • The new running sums are computed for each bin

Brendan's Generic Model for GDY

SELECT item_name, bin, item_value, Max (bin_value) OVER (PARTITION BY bin) bin_value
  FROM (
SELECT * FROM items
  MODEL 
    DIMENSION BY (Row_Number() OVER (ORDER BY item_value DESC) rn)
    MEASURES (item_name, 
              item_value,
              Row_Number() OVER (ORDER BY item_value DESC) bin,
              item_value bin_value,
              Row_Number() OVER (ORDER BY item_value DESC) rn_m,
              0 min_bin,
              Count(*) OVER () - :N_BINS - 1 n_iters
    )
    RULES ITERATE(100000) UNTIL (ITERATION_NUMBER >= n_iters[1]) (
      min_bin[1] = Min(rn_m) KEEP (DENSE_RANK FIRST ORDER BY bin_value)[rn <= :N_BINS],
      bin[ITERATION_NUMBER + :N_BINS + 1] = min_bin[1],
      bin_value[min_bin[1]] = bin_value[CV()] + Nvl (item_value[ITERATION_NUMBER + :N_BINS + 1], 0)
    )
)
 WHERE item_name IS NOT NULL
 ORDER BY item_value DESC

My Model solution works for any number of bins, passing the number of bins as a bind variable. The key idea here is to use values in the first N rows of a generic bin value measure to store all the running bin values, rather than as individual measures. I have included two modifications suggested by Stew in the AskTom thread.

  • Dimension by row number, ordered by item value
  • Initialise a bin measure to the row number (the first N items will remain fixed)
  • Initialise a bin value measure to item value (only first N entries used)
  • Add the row number as a measure, rn_m, in addition to a dimension, for referencing purposes
  • Add a min_bin measure for current minimum bin index (first entry only)
  • Add a measure for the number of iterations required, n_iters
  • The first N items are correctly binned in the measure initialisation
  • Set the minimum bin index using analytic Min function with KEEP clause over the first N rows of bin value
  • Set the bin for the current item to this index
  • Update the bin value for the corresponding bin only

Binfit, v1.3 - MOD

Recursive Subquery Factor for GBR

WITH bins AS (
       SELECT LEVEL bin, :N_BINS n_bins FROM DUAL CONNECT BY LEVEL <= :N_BINS
), items_desc AS (
       SELECT item_name, item_value, Row_Number () OVER (ORDER BY item_value DESC) rn
         FROM items
), rsf (bin, item_name, item_value, bin_value, lev, bin_rank, n_bins) AS (
SELECT b.bin,
       i.item_name, 
       i.item_value, 
       i.item_value,
       1,
       b.n_bins - i.rn + 1,
       b.n_bins
  FROM bins b
  JOIN items_desc i
    ON i.rn = b.bin
 UNION ALL
SELECT r.bin,
       i.item_name, 
       i.item_value, 
       r.bin_value + i.item_value,
       r.lev + 1,
       Row_Number () OVER (ORDER BY r.bin_value + i.item_value),
       r.n_bins
  FROM rsf r
  JOIN items_desc i
    ON i.rn = r.bin_rank + r.lev * r.n_bins
)
SELECT r.item_name,
       r.bin, r.item_value, r.bin_value
  FROM rsf r
 ORDER BY item_value DESC

The idea here is to use recursive subquery factors to iterate through the items in batches of N items, assigning each item to a bin according to the rank of the bin on the previous iteration.

  • Initial subquery factors form record sets for the bins and for the items with their ranks in descending order of value
  • The anchor branch assign bins to the first N items, assigning the item values to a bin value field, and setting the bin rank in ascending order of this bin value
  • The recursive branch joins the batch of items to the record in the previous batch whose bin rank matches that of the item in the reverse sense (so largest item goes to smallest bin etc.)
  • The analytic Row_Number function computes the updated bin ranks, and the bin values are updated by simple addition

Binfit, v1.3 - RSF

Recursive Subquery Factor for GBR with Temporary Table
Create Table and Index

DROP TABLE items_desc_temp
/
CREATE GLOBAL TEMPORARY TABLE items_desc_temp (
   item_name  VARCHAR2(30) NOT NULL,  
   item_value NUMBER(8) NOT NULL,
   rn         NUMBER
)
ON COMMIT DELETE ROWS
/
CREATE INDEX items_desc_temp_N1 ON items_desc_temp (rn)
/

Insert into Temporary Table

INSERT INTO items_desc_temp
SELECT item_name, item_value, Row_Number () OVER (ORDER BY item_value DESC) rn
  FROM items;

RSF Query with Temporary Table

WITH bins AS (
       SELECT LEVEL bin, :N_BINS n_bins FROM DUAL CONNECT BY LEVEL <= :N_BINS
), rsf (bin, item_name, item_value, bin_value, lev, bin_rank, n_bins) AS (
SELECT b.bin,
       i.item_name, 
       i.item_value, 
       i.item_value,
       1,
       b.n_bins - i.rn + 1,
       b.n_bins
  FROM bins b
  JOIN items_desc_temp i
    ON i.rn = b.bin
 UNION ALL
SELECT r.bin,
       i.item_name, 
       i.item_value, 
       r.bin_value + i.item_value,
       r.lev + 1,
       Row_Number () OVER (ORDER BY r.bin_value + i.item_value),
       r.n_bins
  FROM rsf r
  JOIN items_desc_temp i
    ON i.rn = r.bin_rank + r.lev * r.n_bins
)
SELECT item_name, bin, item_value, bin_value
  FROM rsf
 ORDER BY item_value DESC

The idea here is that in the initial RSF query a subquery factor of items was joined on a calculated field, so the whole record set had to be read, and performance could be improved by putting that initial record set into an indexed temporary table ahead of the main query. We'll see in the performance testing section that this changes quadratic variation with problem size into linear variation.

Plain Old SQL Solution for TPA

WITH items_desc AS (
       SELECT item_name, item_value, 
              Mod (Row_Number () OVER (ORDER BY item_value DESC), :N_BINS) + 1 bin
         FROM items
)
SELECT item_name, bin, item_value, Sum (item_value) OVER (PARTITION BY bin) bin_total
  FROM items_desc
 ORDER BY item_value DESC

The idea here is that the TPA algorithm can be implemented in simple SQL using analyic functions.

  • The subquery factor assigns the bins by taking the item rank in descending order of value and applying the modulo (N) function
  • The main query returns the bin totals in addition by analytic summing by bin

Pipelined Function for GDY
Package

CREATE OR REPLACE PACKAGE Bin_Fit AS

TYPE bin_fit_rec_type IS RECORD (item_name VARCHAR2(100), item_value NUMBER, bin NUMBER);
TYPE bin_fit_list_type IS VARRAY(1000) OF bin_fit_rec_type;

TYPE bin_fit_cur_rec_type IS RECORD (item_name VARCHAR2(100), item_value NUMBER);
TYPE bin_fit_cur_type IS REF CURSOR RETURN bin_fit_cur_rec_type;

FUNCTION Items_Binned (p_items_cur bin_fit_cur_type, p_n_bins PLS_INTEGER) RETURN bin_fit_list_type PIPELINED;

END Bin_Fit;
/
CREATE OR REPLACE PACKAGE BODY Bin_Fit AS

c_big_value                 CONSTANT NUMBER := 100000000;
TYPE bin_fit_cur_list_type  IS VARRAY(100) OF bin_fit_cur_rec_type;

FUNCTION Items_Binned (p_items_cur bin_fit_cur_type, p_n_bins PLS_INTEGER) RETURN bin_fit_list_type PIPELINED IS

  l_min_bin              PLS_INTEGER := 1;
  l_min_bin_val             NUMBER;
  l_bins                    SYS.ODCINumberList := SYS.ODCINumberList();
  l_bin_fit_cur_rec         bin_fit_cur_rec_type;
  l_bin_fit_rec             bin_fit_rec_type;
  l_bin_fit_cur_list        bin_fit_cur_list_type;

BEGIN

  l_bins.Extend (p_n_bins);
  FOR i IN 1..p_n_bins LOOP
    l_bins(i) := 0;
  END LOOP;

  LOOP

    FETCH p_items_cur BULK COLLECT INTO l_bin_fit_cur_list LIMIT 100;
    EXIT WHEN l_bin_fit_cur_list.COUNT = 0;

    FOR j IN 1..l_bin_fit_cur_list.COUNT LOOP

      l_bin_fit_rec.item_name := l_bin_fit_cur_list(j).item_name;
      l_bin_fit_rec.item_value := l_bin_fit_cur_list(j).item_value;
      l_bin_fit_rec.bin := l_min_bin;

      PIPE ROW (l_bin_fit_rec);
      l_bins(l_min_bin) := l_bins(l_min_bin) + l_bin_fit_cur_list(j).item_value;

      l_min_bin_val := c_big_value;
      FOR i IN 1..p_n_bins LOOP

        IF l_bins(i) < l_min_bin_val THEN
          l_min_bin := i;
          l_min_bin_val := l_bins(i);
        END IF;

      END LOOP;

    END LOOP;

  END LOOP;

END Items_Binned;

SQL Query

SELECT item_name, bin, item_value, Sum (item_value) OVER (PARTITION BY bin) bin_value
  FROM TABLE (Bin_Fit.Items_Binned (
                     CURSOR (SELECT item_name, item_value FROM items ORDER BY item_value DESC), 
                     :N_BINS))
 ORDER BY item_value DESC

The idea here is that procedural algorithms can often be implemented more efficiently in PL/SQL than in SQL.

  • The first parameter to the function is a strongly-typed reference cursor
  • The SQL call passes in a SELECT statement wrapped in the CURSOR keyword, so the function can be used for any set of records that returns name and numeric value pairs
  • The item records are fetched in batches of 100 using the LIMIT clause to improves efficiency

Performance Testing
I tested performance of the various queries using my own benchmarking framework across grids of data points, with two data sets to split the queries into two sets based on performance.

Query Modifications for Performance Testing

  • The RSF query with staging table was run within a pipelined function in order to easily include the insert in the timings
  • A system context was used to pass the bind variables as the framework runs the queries from PL/SQL, not from SQL*Plus
  • I found that calculating the bin values using analytic sums, as in the code above, affected performance, so I removed this for clarity of results, outputting only item name, value and bin

Test Data Sets
For a given depth parameter, d, random numbers were inserted within the range 0-d for d-1 records. The insert was:

 INSERT INTO items
  SELECT 'item-' || n, DBMS_Random.Value (0, p_point_deep) FROM  
  (SELECT LEVEL n FROM DUAL CONNECT BY LEVEL < p_point_deep);

The number of bins was passed as a width parameter, but note that the original, linked Model solution, MODO, hard-codes the number of bins to 3.

Test Results

Data Set 1 - Small
This was used for the following queries:

  • MODO - Original Model for GDY
  • MODB - Brendan's Generic Model for GDY
  • RSFQ - Recursive Subquery Factor for GBR
 Depth         W3         W3         W3
Run Type=MODO
 D1000       1.03       1.77       1.05
 D2000       3.98       6.46       5.38
 D4000      15.79       20.7      25.58
 D8000      63.18      88.75      92.27
D16000      364.2     347.74     351.99
Run Type=MODB
 Depth         W3         W6        W12
 D1000        .27        .42        .27
 D2000          1       1.58       1.59
 D4000       3.86        3.8       6.19
 D8000      23.26      24.57      17.19
D16000      82.29      92.04      96.02
Run Type=RSFQ
 D1000       3.24       3.17       1.53
 D2000       8.58       9.68       8.02
 D4000      25.65      24.07      23.17
 D8000      111.3     108.25      98.33
D16000     471.17     407.65     399.99

Slice W3
The results show:

  • Quadratic variation of CPU time with number of items
  • Little variation of CPU time with number of bins, although RSFQ seems to show some decline
  • RSFQ is slightly slower than MODO, while my version of Model, MODB is about 4 times faster than MODO

Data Set 2 - Large
This was used for the following queries:

  • RSFT - Recursive Subquery Factor for GBR with Temporary Table
  • POSS - Plain Old SQL Solution for TPA
  • PLFN - Pipelined Function for GDY

This table gives the CPU times in seconds across the data set:

  Depth       W100      W1000     W10000
Run Type=PLFN
 D20000        .31       1.92      19.25
 D40000        .65       3.87      55.78
 D80000       1.28       7.72      92.83
D160000       2.67      16.59     214.96
D320000       5.29      38.68      418.7
D640000      11.61      84.57      823.9
Run Type=POSS
 D20000        .09        .13        .13
 D40000        .18        .21        .18
 D80000        .27        .36         .6
D160000        .74       1.07        .83
D320000       1.36       1.58       1.58
D640000       3.13       3.97       4.04
Run Type=RSFT
 D20000        .78        .78        .84
 D40000       1.41       1.54        1.7
 D80000       3.02       3.39       4.88
D160000       6.11       9.56       8.42
D320000      13.05      18.93      20.84
D640000      41.62      40.98      41.09

Slice W100

Slice W10000
The results show:

  • Linear variation of CPU time with number of items
  • Little variation of CPU time with number of bins for POSS and RSFT, but roughly linear variation for PLFN
  • These linear methods are much faster than the earlier quadratic ones for larger numbers of items
  • Its approximate proportionality of time to number of bins means that, while PLFN is faster than RSFT for small number of bins, it becomes slower from around 50 bins for our problem
  • The proportionality to number of bins for PLFN presumably arises from the step to find the bin of minimum value
  • The lack of proportionality to number of bins for RSFT may appear surprising since it performs a sort of the bins iteratively: However, while the work for this sort is likely to be proportional to the number of bins, the number of iterations is inversely proportional and thus cancels out the variation

Solution Quality

The methods reported above implement three underlying algorithms, none of which guarantees an optimal solution. In order to get an idea of how the quality compares, I created new versions of the second set of queries using analytic functions to output the difference between minimum and maximum bin values, with percentage of the maximum also output. I ran these on the same grid, and report below the results for the four corners.

Method:			PLFN		RSFT		POSS
Point:	W100/D20000
Diff/%:			72/.004%	72/.004%	19,825/1%
Point:	W100/D640000
Diff/%:			60/.000003%	60/.000003%	633499/.03%
Point:	W10000/D20000
Diff/%:			189/.9%		180/.9%		19,995/67%
Point:	W10000/D640000
Diff/%:			695/.003%	695/.003%	639,933/3%

The results indicate that GDY (Greedy Algorithm) and GBR (Greedy Algorithm with Batched Rebalancing) generally give very similar quality results, while TPA (Team Picking Algorithm) tends to be quite a lot worse.

Extended Problem: Finding the Number of Bins Required

An important extension to the problem is when the bins have fixed capacity, and it is desired to find the minimum number of bins, then spread the items evenly between them. As mentioned at the start, I posted extensions to two of my solutions on an OTN thread, and I reproduce them here. It turns out to be quite easy to make the extension. The remainder of this section is just lifted from my OTN post and refers to the table of the original poster.

Start OTN Extract
So how do we determine the number of bins? The total quantity divided by bin capacity, rounded up, gives a lower bound on the number of bins needed. The actual number required may be larger, but mostly it will be within a very small range from the lower bound, I believe (I suspect it will nearly always be the lower bound). A good practical solution, therefore, would be to compute the solutions for a base number, plus one or more increments, and this can be done with negligible extra work (although Model might be an exception, I haven't tried it). Then the bin totals can be computed, and the first solution that meets the constraints can be used. I took two bin sets here.

SQL POS

WITH items AS (
       SELECT sl_pm_code item_name, sl_wt item_amt, sl_qty item_qty,
              Ceil (Sum(sl_qty) OVER () / :MAX_QTY) n_bins
         FROM ow_ship_det
), items_desc AS (
       SELECT item_name, item_amt, item_qty, n_bins,
              Mod (Row_Number () OVER (ORDER BY item_qty DESC), n_bins) bin_1,
              Mod (Row_Number () OVER (ORDER BY item_qty DESC), n_bins + 1) bin_2
         FROM items
)
SELECT item_name, item_amt, item_qty, 
       CASE bin_1 WHEN 0 THEN n_bins ELSE bin_1 END bin_1, 
       CASE bin_2 WHEN 0 THEN n_bins + 1 ELSE bin_2 END bin_2, 
       Sum (item_amt) OVER (PARTITION BY bin_1) bin_1_amt,
       Sum (item_qty) OVER (PARTITION BY bin_1) bin_1_qty,
       Sum (item_amt) OVER (PARTITION BY bin_2) bin_2_amt,
       Sum (item_qty) OVER (PARTITION BY bin_2) bin_2_qty
  FROM items_desc
 ORDER BY item_qty DESC, bin_1, bin_2

SQL Pipelined

SELECT osd.sl_pm_code item_name, osd.sl_wt item_amt, osd.sl_qty item_qty, 
       tab.bin_1, tab.bin_2, 
       Sum (osd.sl_wt) OVER (PARTITION BY tab.bin_1) bin_1_amt,
       Sum (osd.sl_qty) OVER (PARTITION BY tab.bin_1) bin_1_qty,
       Sum (osd.sl_wt) OVER (PARTITION BY tab.bin_2) bin_2_amt,
       Sum (osd.sl_qty) OVER (PARTITION BY tab.bin_2) bin_2_qty
  FROM ow_ship_det osd
  JOIN TABLE (Bin_Even.Items_Binned (
                     CURSOR (SELECT sl_pm_code item_name, sl_qty item_value,
                                    Sum(sl_qty) OVER () item_total
                               FROM ow_ship_det
                              ORDER BY sl_qty DESC, sl_wt DESC),
                     :MAX_QTY)) tab
    ON tab.item_name = osd.sl_pm_code
 ORDER BY osd.sl_qty DESC, tab.bin_1

Pipelined Function

CREATE OR REPLACE PACKAGE Bin_Even AS

TYPE bin_even_rec_type IS RECORD (item_name VARCHAR2(100), item_value NUMBER, bin_1 NUMBER, bin_2 NUMBER);
TYPE bin_even_list_type IS VARRAY(1000) OF bin_even_rec_type;

TYPE bin_even_cur_rec_type IS RECORD (item_name VARCHAR2(100), item_value NUMBER, item_total NUMBER);
TYPE bin_even_cur_type IS REF CURSOR RETURN bin_even_cur_rec_type;

FUNCTION Items_Binned (p_items_cur bin_even_cur_type, p_bin_max NUMBER) RETURN bin_even_list_type PIPELINED;

END Bin_Even;
/
SHO ERR
CREATE OR REPLACE PACKAGE BODY Bin_Even AS

c_big_value                 CONSTANT NUMBER := 100000000;
c_n_bin_sets                CONSTANT NUMBER := 2;

TYPE bin_even_cur_list_type IS VARRAY(100) OF bin_even_cur_rec_type;
TYPE num_lol_list_type      IS VARRAY(100) OF SYS.ODCINumberList;

FUNCTION Items_Binned (p_items_cur bin_even_cur_type, p_bin_max NUMBER) RETURN bin_even_list_type PIPELINED IS

  l_min_bin                 SYS.ODCINumberList := SYS.ODCINumberList (1, 1);
  l_min_bin_val             SYS.ODCINumberList := SYS.ODCINumberList (c_big_value, c_big_value);
  l_bins                    num_lol_list_type := num_lol_list_type (SYS.ODCINumberList(), SYS.ODCINumberList());

  l_bin_even_cur_rec        bin_even_cur_rec_type;
  l_bin_even_rec            bin_even_rec_type;
  l_bin_even_cur_list       bin_even_cur_list_type;

  l_n_bins                  PLS_INTEGER;
  l_n_bins_base             PLS_INTEGER;
  l_is_first_fetch          BOOLEAN := TRUE;

BEGIN

  LOOP

    FETCH p_items_cur BULK COLLECT INTO l_bin_even_cur_list LIMIT 100;
    EXIT WHEN l_Bin_Even_cur_list.COUNT = 0;
    IF l_is_first_fetch THEN

      l_n_bins_base := Ceil (l_Bin_Even_cur_list(1).item_total / p_bin_max) - 1;

      l_is_first_fetch := FALSE;

      l_n_bins := l_n_bins_base;
      FOR i IN 1..c_n_bin_sets LOOP

        l_n_bins := l_n_bins + 1;
        l_bins(i).Extend (l_n_bins);
        FOR k IN 1..l_n_bins LOOP
          l_bins(i)(k) := 0;
        END LOOP;

      END LOOP;

    END IF;

    FOR j IN 1..l_Bin_Even_cur_list.COUNT LOOP

      l_bin_even_rec.item_name := l_bin_even_cur_list(j).item_name;
      l_bin_even_rec.item_value := l_bin_even_cur_list(j).item_value;
      l_bin_even_rec.bin_1 := l_min_bin(1);
      l_bin_even_rec.bin_2 := l_min_bin(2);

      PIPE ROW (l_bin_even_rec);

      l_n_bins := l_n_bins_base;
      FOR i IN 1..c_n_bin_sets LOOP
        l_n_bins := l_n_bins + 1;
        l_bins(i)(l_min_bin(i)) := l_bins(i)(l_min_bin(i)) + l_Bin_Even_cur_list(j).item_value;

        l_min_bin_val(i) := c_big_value;
        FOR k IN 1..l_n_bins LOOP

          IF l_bins(i)(k) < l_min_bin_val(i) THEN
            l_min_bin(i) := k;
            l_min_bin_val(i) := l_bins(i)(k);
          END IF;

        END LOOP;

      END LOOP;

    END LOOP;

  END LOOP;

END Items_Binned;

END Bin_Even;

Output POS
Note BIN_1 means bin set 1, which turns out to have 4 bins, while bin set 2 then necessarily has 5.

ITEM_NAME         ITEM_AMT   ITEM_QTY      BIN_1      BIN_2  BIN_1_AMT  BIN_1_QTY  BIN_2_AMT  BIN_2_QTY
--------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
1239606-1080          4024        266          1          1      25562        995      17482        827
1239606-1045          1880        192          2          2      19394        886      14568        732
1239606-1044          1567        160          3          3      18115        835      14097        688
1239606-1081          2118        140          4          4      18988        793      17130        657
1239606-2094          5741         96          1          5      25562        995      18782        605
...
1239606-2107            80          3          4          2      18988        793      14568        732
1239606-2084           122          3          4          3      18988        793      14097        688
1239606-2110           210          2          2          3      19394        886      14097        688
1239606-4022           212          2          3          4      18115        835      17130        657
1239606-4021           212          2          4          5      18988        793      18782        605

Output Pipelined

ITEM_NAME         ITEM_AMT   ITEM_QTY      BIN_1      BIN_2  BIN_1_AMT  BIN_1_QTY  BIN_2_AMT  BIN_2_QTY
--------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
1239606-1080          4024        266          1          1      20627        878      15805        703
1239606-1045          1880        192          2          2      18220        877      16176        703
1239606-1044          1567        160          3          3      20425        878      15651        701
1239606-1081          2118        140          4          4      22787        876      14797        701
1239606-2094          5741         96          4          5      22787        876      19630        701
...
1239606-2089            80          3          4          1      22787        876      15805        703
1239606-2112           141          3          4          2      22787        876      16176        703
1239606-4022           212          2          1          1      20627        878      15805        703
1239606-4021           212          2          2          1      18220        877      15805        703
1239606-2110           210          2          3          2      20425        878      16176        703

End OTN Extract

Conclusions

  • Various solutions for the balanced number partitioning problem have been presented, using Oracle's Model clause, Recursive Subquery Factoring, Pipelined Functions and simple SQL
  • The performance characteristics of these solutions have been tested across a range of data sets
  • As is often the case, the best solution depends on the shape and size of the data set
  • A simple extension has been shown to allow determining the number of bins required in the bin-fitting interpretation of the problem
  • Replacing a WITH clause with a staging table can be a useful technique to allow indexed scans

Get the code here: Brendan's repo for interesting SQL






SQL for Network Grouping

I noticed an interesting question posted on OTN this (European) Saturday morning,
Hierarchical query to combine two groupings into one broad joint grouping. I quickly realised that the problem posed was an example of a very general class of network problems that arises quite often:

Given a set of nodes and a rule for pair-wise (non-directional) linking, obtain the set of implied networks

Usually, in response to such a problem someone will suggest a CONNECT BY query solution. Unfortunately, although hierarchical SQL techniques can be used theoretically to resolve these non-hierarchical networks, they tend to be extremely inefficient for networks of any size and are therefore often impractical. There are two problems in particular:

  1. Non-hierarchical networks have no root nodes, so the traversal needs to be repeated from every node in the network set
  2. Hierarchical queries retrieve all possible routes through a network

I illustrated the second problem in my last post, Notes on Profiling Oracle PL/SQL, and I intend to write a longer article on the subject of networks at a later date. The most efficient way to traverse generalised networks in Oracle involves the use of PL/SQL, such as in my Scribd article of June 2010, An Oracle Network Traversal PL SQL Program. For this article, though, I will stick to SQL-only techniques and will write down three solutions in a general format whereby the tables of the specific problem are read by initial subquery factors links_v and nodes_v that are used in the rest of the queries. I'll save detailed explanation and performance analysis for the later article (see update at end of this section).

The three queries use two hierarchical methods and a method involving the Model clause:

  1. CONNECT BY: This is the least efficient
  2. Recursive subquery factors: This is more efficient than the first but still suffers from the two problems above
  3. Model clause: This is intended to bypass the performance problems of hierarchical queries, but is still slower than PL/SQL

[Update, 2 September 2015] I have since written two articles on related subjects, the first, PL/SQL Pipelined Function for Network Analysis describes a PL/SQL program that traverses all networks and lists their structure. The second, Recursive SQL for Network Analysis, and Duality, uses a series of examples to illustrate and explain the different characteristics of the first two recursive SQL methods.

Problem Definition
Data Structure
I have taken the data structure of the OTN poster, made all fields character, and added three more records comprising a second isolated node (10) and a subnetwork of nodes 08 and 09. ITEM_ID is taken to be the primary key.

SQL> SELECT *
  2    FROM item_groups
  3  /

ITEM_ID    GROUP1   GROUP2
---------- -------- --------
01         A        100
02         A        100
03         A        101
04         B        100
05         B        102
06         C        103
07         D        101
08         E        104
09         E        105
10         F        106

10 rows selected.

Grouping Structure
The poster defines two items to be linked if they share the same value for either GROUP1 or GROUP2 attributes (which could obviously be generalised to any number of attributes), and items are in the same group if they can be connected by a chain of links. Observe that if there were only one grouping attribute then the problem would be trivial as that would itself group the items. Having more than one makes it more interesting and more difficult.

A real world example of such networks can be seen to be sibling networks if one takes people as the nodes and father and mother as the attributes.

Network Diagram
Item Groups, v1.0
CONNECT BY Solution
SQL

WITH links_v AS (
SELECT t_fr.item_id node_id_fr,
       t_to.item_id node_id_to,
       t_fr.item_id || '-' || Row_Number() OVER (PARTITION BY t_fr.item_id ORDER BY t_to.item_id) link_id
  FROM item_groups t_fr
  JOIN item_groups t_to
    ON t_to.item_id > t_fr.item_id
   AND (t_to.group1 = t_fr.group1 OR t_to.group2 = t_fr.group2)
), nodes_v AS (
 SELECT item_id node_id
   FROM item_groups
), tree AS (
SELECT link_id, CONNECT_BY_ROOT (link_id) root_id
  FROM links_v
CONNECT BY NOCYCLE (node_id_fr = PRIOR node_id_to OR node_id_to = PRIOR node_id_fr OR 
                     node_id_fr = PRIOR node_id_fr OR node_id_to = PRIOR node_id_to)
), group_by_link AS (
SELECT DISTINCT Min (root_id) OVER (PARTITION BY link_id) group_id, link_id
  FROM tree
), linked_nodes AS (
SELECT g.group_id, l.node_id_fr node_id
  FROM group_by_link g
  JOIN links_v l
    ON l.link_id = g.link_id
 UNION
SELECT g.group_id, l.node_id_to
  FROM group_by_link g
  JOIN links_v l
    ON l.link_id = g.link_id
)
SELECT l.group_id "Network", l.node_id "Node"
  FROM linked_nodes l
 UNION ALL
SELECT '00 (unlinked)', node_id
  FROM nodes_v n
 WHERE n.node_id NOT IN (SELECT node_id FROM linked_nodes)
ORDER BY 1, 2

Output

All networks by CONNECT BY - Unlinked nodes share network id 0
Network       Node
------------- ----
00 (unlinked) 06
              10
01-1          01
              02
              03
              04
              05
              07
08-1          08
              09

10 rows selected.

Notes on CONNECT BY Solution

  • For convenience I have grouped the unlinked nodes into one dummy network; it's easy to assign them individual identifiers if desired

Recursive Subquery Factors (RSF) Solution
SQL

WITH links_v AS (
SELECT t_fr.item_id node_id_fr,
       t_to.item_id node_id_to,
       t_fr.item_id || '-' || Row_Number() OVER (PARTITION BY t_fr.item_id ORDER BY t_to.item_id) link_id
  FROM item_groups t_fr
  JOIN item_groups t_to
    ON t_to.item_id > t_fr.item_id
   AND (t_to.group1 = t_fr.group1 OR t_to.group2 = t_fr.group2)
), nodes_v AS (
 SELECT item_id node_id
   FROM item_groups
), rsf (node_id, id, root_id) AS (
SELECT node_id, NULL, node_id
  FROM nodes_v
 UNION ALL
SELECT CASE WHEN l.node_id_to = r.node_id THEN l.node_id_fr ELSE l.node_id_to END, 
       l.link_id id, r.root_id
  FROM rsf r
  JOIN links_v l
    ON (l.node_id_fr = r.node_id OR l.node_id_to = r.node_id)
   AND l.link_id != Nvl (r.id, '0')
) CYCLE node_id SET is_cycle TO '*' DEFAULT ' '
SELECT DISTINCT Min (root_id) OVER (PARTITION BY node_id) "Network", node_id "Node"
  FROM rsf
 ORDER BY 1, 2

Output

All networks by RSF - Unlinked nodes have their own network ids
Network       Node
------------- ----
01            01
              02
              03
              04
              05
              07
06            06
08            08
              09
10            10

10 rows selected.

Notes on Recursive Subquery Factors (RSF) Solution

  • Here I have given the unlinked nodes their own network identifiers; they could equally have been grouped together under a dummy network

Model Clause Solution
SQL

WITH links_v AS (
SELECT t_fr.item_id node_id_fr,
       t_to.item_id node_id_to,
       t_fr.item_id || '-' || Row_Number() OVER (PARTITION BY t_fr.item_id ORDER BY t_to.item_id) link_id
  FROM item_groups t_fr
  JOIN item_groups t_to
    ON t_to.item_id > t_fr.item_id
   AND (t_to.group1 = t_fr.group1 OR t_to.group2 = t_fr.group2)
), nodes_v AS (
 SELECT item_id node_id
   FROM item_groups
), lnk_iter AS (
SELECT *
  FROM links_v
 CROSS JOIN (SELECT 0 iter FROM DUAL UNION SELECT 1 FROM DUAL)
), mod AS (
SELECT *
  FROM lnk_iter
MODEL
  DIMENSION BY (Row_Number() OVER (PARTITION BY iter ORDER BY link_id) rn, iter)
  MEASURES (Row_Number() OVER (PARTITION BY iter ORDER BY link_id) id_rn, link_id id,
        node_id_fr nd1, node_id_to nd2,
        1 lnk_cur,
        CAST ('x' AS VARCHAR2(100)) nd1_cur,
        CAST ('x' AS VARCHAR2(100)) nd2_cur,
        0 net_cur,
        CAST (NULL AS NUMBER) net,
        CAST (NULL AS NUMBER) lnk_prc,
        1 not_done,
        0 itnum)
  RULES UPSERT ALL
  ITERATE(100000) UNTIL (lnk_cur[1, Mod (iteration_number+1, 2)] IS NULL)
  (
    itnum[ANY, ANY] = iteration_number,
    not_done[ANY, Mod (iteration_number+1, 2)] = Count (CASE WHEN net IS NULL THEN 1 END)[ANY, Mod (iteration_number, 2)],
    lnk_cur[ANY, Mod (iteration_number+1, 2)] = 
        CASE WHEN not_done[CV(), Mod (iteration_number+1, 2)] > 0 THEN 
               Nvl (Min (CASE WHEN lnk_prc IS NULL AND net = net_cur THEN id_rn END)[ANY, Mod (iteration_number, 2)],
                    Min (CASE WHEN net IS NULL THEN id_rn END)[ANY, Mod (iteration_number, 2)])
        END,
    lnk_prc[ANY, Mod (iteration_number+1, 2)] = lnk_prc[CV(), Mod (iteration_number, 2)],
    lnk_prc[lnk_cur[1, Mod (iteration_number+1, 2)], Mod (iteration_number+1, 2)] = 1,
    net_cur[ANY, Mod (iteration_number+1, 2)] = 
        CASE WHEN Min (CASE WHEN lnk_prc IS NULL AND net = net_cur THEN id_rn END)[ANY, Mod (iteration_number, 2)] IS NULL THEN
               net_cur[CV(), Mod (iteration_number, 2)] + 1 
             ELSE 
               net_cur[CV(), Mod (iteration_number, 2)] 
        END,
    nd1_cur[ANY, Mod (iteration_number+1, 2)] = nd1[lnk_cur[CV(), Mod (iteration_number+1, 2)], Mod (iteration_number, 2)],
    nd2_cur[ANY, Mod (iteration_number+1, 2)] = nd2[lnk_cur[CV(), Mod (iteration_number+1, 2)], Mod (iteration_number, 2)],
    net[ANY, Mod (iteration_number+1, 2)] = 
        CASE WHEN (nd1[CV(),Mod (iteration_number+1, 2)] IN (nd1_cur[CV(),Mod (iteration_number+1, 2)], nd2_cur[CV(),Mod (iteration_number+1, 2)]) OR 
                   nd2[CV(),Mod (iteration_number+1, 2)] IN (nd1_cur[CV(),Mod (iteration_number+1, 2)], nd2_cur[CV(),Mod (iteration_number+1, 2)]))
                   AND net[CV(),Mod (iteration_number, 2)] IS NULL THEN
               net_cur[CV(),Mod (iteration_number+1, 2)]
             ELSE
               net[CV(),Mod (iteration_number, 2)]
        END
  )
)
SELECT To_Char (net) "Network", nd1 "Node"
  FROM mod
 WHERE not_done = 0
 UNION
SELECT To_Char (net), nd2
  FROM mod
 WHERE not_done = 0
 UNION ALL
SELECT '0 (unlinked)', node_id
  FROM nodes_v n
 WHERE n.node_id NOT IN (SELECT nd1 FROM mod WHERE nd1 IS NOT NULL UNION SELECT nd2 FROM mod WHERE nd2 IS NOT NULL)
ORDER by 1, 2

Output

All networks by Model - Unlinked nodes share network id 00
Network       Node
------------- ----
0 (unlinked)  06
              10
1             01
              02
              03
              04
              05
              07
2             08
              09

10 rows selected.

Notes on Model Clause Solution

  • For convenience I have grouped the unlinked nodes into one dummy network; it's easy to assign them individual identifiers if desired
  • My Cyclic Iteration technique used here appears to be novel

Conclusions

  • It is always advisable with a new problem in SQL to consider whether it falls into a general class of problems for which solutions have already been found
  • Three solution methods for network resolution in pure SQL have been presented and demonstrated on a small test problem; the performance issues mentioned should be considered carefully before applying them on larger problems
  • The Model clause solution is likely to be the most efficient on larger, looped networks, but if better performance is required then PL/SQL recursion-based methods would be faster
  • For smaller problems with few loops the simpler method of recursive subquery factors may be preferred, or, for versions prior to v11.2, CONNECT BY






Grouping by Unique Subsequences in SQL

Recently a deceptively simple question was asked on Oracle’s OTN PL/SQL forum that most posters initially misunderstood, myself included (Grouping Non Consecutive Rows). The question requested a solution for the problem of assigning group numbers to a sequence of records such that each group held no duplicate values of a particular field, and each group was as long as possible. One of the posters produced a solution involving the Model clause and I tried to find a solution without using that clause, just to see if it could be done. Having found such a solution, not without some difficulty, I then solved the problem via a pipelined PL/SQL function having felt that that would be more efficient than straight SQL.

I think all three solutions have their own interest, especially since forum posters frequently assert, incorrectly, that SQL solutions are always faster than those using PL/SQL. I’ll explain how each solution works in this article and will run them through my benchmarking framework. We’ll see that the PL/SQL solution time increases linearly with sequence length, while the others increase quadratically, and PL/SQL is orders of magnitude faster for even small problem sizes. I used Oracle Database v11.2 XE running on a Samsung X120 dedicated PC.

I use my Query Structure Diagramming technique to illustrate the SQL solutions.

Functional Test Data
The problem data structure is quite simple, and I have defined my own version to emphasise generality, and to include partitioning, which was not part of the initial posting. There is one table with a two-column primary key, and I added an index on the partition field plus the value field.

Table Value_Subseqs

Column Type
part_key* Char(10)
ind* Number
val Char(10)

Index VSB_N1

  • part_key
  • val

Test Cases
Functional testing was done on a number of simple sequences, including the sequence of single characters, ABABB, which is used to illustrate the first solution query.

SQL Pairs Solution

How It Works
The first solution for this problem starts by obtaining the possible start and end points of the groups: all pairs that contain no duplicate. In the table below, the rows represent the possible pairs with X marking each value in the ranges. It’s easy to see the solution for this small test problem and the correct pairs are highlighted in yellow.

From the table it’s possible to work out a solution in SQL, given the pair set. The first correct pair is the longest starting from 1, while each subsequent correct pair is the longest beginning one element after the previous ends. This is of course a kind of tree-walk, which leads to the following solution steps (where everything is implicitly partitioned):

  1. Within a subquery factor, self-join the table with the second record having a higher ind than the first
  2. Add a NOT EXISTS subquery that checks for duplicate val in any pair between the outer potantial start and end point pair, using another self-join
  3. Add in the single element pairs via a UNION
  4. Within another subquery factor, obtain the rank of each pair in terms of its length descending, as well as the starting ind value (if it might not always be 1)
  5. In another subquery factor perform the tree-walk as mentioned, using the condition ‘rank = 1’ to include only the longest ranges from any point
  6. Include the the analytic function Row_Number in the Select list, which will be the group number
  7. The main query selects from the last subquery factor, then joins the original table

Notes
The query is of course likely to be performance-intensive owing to the initial subquery factor with its nested self-joins across ranges.

Query Diagram

Notes
The diagram notation follows and extends notation developed earlier, including my previous blog article, and is intended to be largely self-explanatory. In this diagram, I have added a new notation for joins that are not simple foreign key joins, in which I label the join and use a note to explain it.
Oracle v11.2 introduced Recursive Subquery Factors that extend tree-walk functionality. I used the older Connect By syntax in the query since it works on older versions, but found it easier to represent in the diagram as though it were the newer implementation – the diagram shows what’s happening logically.

SQL

WITH sqf AS (
SELECT p1.part_key, p1.ind ind_1, p2.ind ind_2
  FROM value_subseqs p1
  JOIN value_subseqs p2
    ON p2.ind           > p1.ind
   AND p2.part_key      = p1.part_key
   AND NOT EXISTS (SELECT 1
                     FROM value_subseqs p3
                     JOIN value_subseqs p4
                       ON p4.val        = p3.val
                      AND p4.part_key   = p3.part_key
                    WHERE p3.ind        BETWEEN p1.ind AND p2.ind
                      AND p4.ind        BETWEEN p3.ind + 1 AND p2.ind
                      AND p3.part_key   = p1.part_key
                      AND p4.part_key   = p2.part_key)
 UNION ALL
SELECT part_key, ind, ind
  FROM value_subseqs p1
), rnk AS (
SELECT part_key, ind_1, ind_2,
        Row_Number() OVER (PARTITION BY part_key, ind_1 ORDER BY ind_2 - ind_1 DESC) rn,
        Min(ind_1) OVER (PARTITION BY part_key) ind_1_beg
  FROM sqf
), grp AS (
SELECT part_key, ind_1, ind_2, Row_Number() OVER
       (PARTITION BY part_key ORDER BY ind_1, ind_2) grp_no
  FROM rnk
CONNECT BY ind_1 = PRIOR ind_2 + 1
   AND part_key = PRIOR part_key
   AND rn = 1
 START WITH ind_1 = ind_1_beg AND rn = 1
)
SELECT
    p.part_key,
    p.ind,
    p.val,
    g.grp_no
  FROM grp g
  JOIN value_subseqs p
    ON p.ind            BETWEEN g.ind_1 AND g.ind_2
   AND p.part_key       = g.part_key
 ORDER BY p.part_key, p.ind

Model Solution

How It Works
In the OTN thread several solutions were proposed that used Oracle’s Model clause or recursive subquery factoring, but I think only one was a general solution, since the others used string variables to successively concatenate strings over arbitrary numbers of rows and would break when the 4000 character SQL limit is hit.
The general Model solution (which was not by me, but I’ve reformatted it and applied it to my table) worked by defining two measures, for group start indices and group number. The rules specified two passes for the two measures: The first pass counts the distinct values and compares with the count of all values, between the previous group start and the current index; the second uses the group starts to set the group numbers.

  1. Form the basic Select, with all the table columns required, and append a group number placeholder 
  2. Add the Model keyword, partitioning by part_key, dimensioning by analytic function Row_Number, ordering by ind within part_key, with val, group start and group number as measures
  3. Initialise group start and group number to 1 in the measures clause
  4. Define the first rule to obtain the group start date for all rows after the first as the previous group start, unless there is a difference between the two counts, in which case take the new index.
  5. Define the second rule to obtain the group number for all rows as the previous group number, unless the group start has changed, in which case take the previous group number + 1.

Query Diagram

Notes
Queries with the Model clause have a structure that is rather different from other queries, and the diagram attempts to reflect that structure for these problems. The main query feeds its output into an array processing component with a set of rules that specify how any additional data items (called measures) are to be calculated, in a mostly declarative fashion.
The model box above contains 4 specification types:

  • Partition - processing is to be performed separately by one or more columns; the same meaning as in analytic functions
  • Dimension - columns by which the array is dimensioned; can included analytic functions, as here
  • Measures - remaining columns that may be calculated or updated by the rules, possibly including placeholders from the main query
  • Rules - a set of rules that specify measure calculation; rules are processed sequentially, unless otherwise specified; in the diagram:
    • n - the current dimension value
    • F(n-1,n) - denotes that the value depends on values from previous and current rows (and so on, ‘..’ denotes a range)
    • ^ - denotes that the calculation progresses in ascending order by dimension; this is the default so does not have to be coded

SQL

SELECT
    part_key,
    rn,
    val,
    g grp_no
  FROM value_subseqs
 MODEL
   PARTITION BY (part_key)
   DIMENSION BY (Row_number() OVER (PARTITION BY part_key ORDER BY ind) rn)
   MEASURES (val, 1 g, 1 s)
   RULES (
     s[rn > 1] = CASE COUNT (DISTINCT val)[rn BETWEEN s[CV() - 1] AND CV()]
                   WHEN COUNT (val)[rn BETWEEN s[CV() - 1] AND cv()] THEN s[cv() - 1]
                   ELSE CV(rn)
                 END,
     g[rn > 1] = CASE s[CV()]
                    WHEN s[CV() - 1] THEN g[CV() - 1]
                    ELSE g[CV() - 1] + 1
                 END
   )
 ORDER BY part_key, rn

Pipelined Function Hash Solution

How It Works
This approach is based on pipelined database functions, which are specified to return array types. Pipelining means that Oracle transparently returns the records in batches while processing continues, thus avoiding memory problems, and returning initial rows more quickly. See Pipelined Functions (AskTom) for some other examples of use.
Within the function there is a simple cursor loop over the ordered sequence. A PL/SQL index-by array stores values for the current group, and allows duplicate checking to take place without any additional searching or sorting. The array is reset whenever the group changes.

Types
Two database types are specified, the first being an object with fields for the table columns and an extra field for the group to be derived; the second is an array of the nested table form with elements of the first type.

Function Pseudocode

Loop over a cursor selecting the records in order
	If the partition field value changes then
		Reset group and index-by array
	Else if the current value is already in the index-by array then
		Increment group number and reset index-by array
	End if
	Add the value to the index-by array
	Pipe the row out
End loop

Function Definition (within package)

FUNCTION Hash_Array RETURN value_subseq_list_type PIPELINED IS

  TYPE value_list_type      IS TABLE OF PLS_INTEGER INDEX BY VARCHAR2(4000);
  l_value_list_NULL         value_list_type;
  l_value_list              value_list_type;
  l_group_no                PLS_INTEGER;
  old_part_key              VARCHAR2(10);

BEGIN

  FOR r_val IN (SELECT part_key, ind, val FROM value_subseqs ORDER BY part_key, ind) LOOP

    IF r_val.part_key != old_part_key OR old_part_key IS NULL THEN

      old_part_key := r_val.part_key;
      l_group_no := 1;
      l_value_list := l_value_list_NULL;

    ELSIF l_value_list.Exists (r_val.val) THEN

      l_group_no := l_group_no + 1;
      l_value_list := l_value_list_NULL;

    END IF;

    l_value_list (r_val.val) := 1;
    PIPE ROW (value_subseq_type (r_val.part_key, r_val.ind, r_val.val, l_group_no));

  END LOOP;

END Hash_Array;

SQL
Just select the fields named in the record from the function wrapped in the TABLE keyword.

SELECT
    part_key,
    ind,
    val,
    grp_no
  FROM TABLE (Subseq_Groups.Hash_Array)
 ORDER BY part_key, ind

Pipelined Function Sim Solution
This solution was added after performance testing on the the first data set, below. It is a sort of hybrid between the Model and pipelined function approach created to try to understand the apparent quadratic variation of Model with sequence length noted in testing.

How It Works
This function uses the same database types as the Hash solution, but with the same counting idea as the Model solution within an old-fashioned nested cursor structure that one would not expect to perform efficiently.

Function Pseudocode

Loop over a cursor selecting the records in order
	If the partition field value changes then
		Reset group and group starting index
	Else
		Select counts of val and distinct val from the table between the group starting and current indices
		If difference in counts then
			Increment group number and reset group starting index
		End if
	End if
	Pipe the row out
End loop

Function Definition (within package)

FUNCTION Sim_Model RETURN value_subseq_list_type PIPELINED IS

  l_group_no                PLS_INTEGER;
  l_ind_beg                 PLS_INTEGER;
  l_is_dup                  PLS_INTEGER;
  old_part_key              VARCHAR2(10);

BEGIN

  FOR r_val IN (SELECT part_key, ind, val FROM value_subseqs ORDER BY part_key, ind) LOOP

    IF r_val.part_key != old_part_key OR old_part_key IS NULL THEN

      old_part_key := r_val.part_key;
      l_group_no := 1;
      l_ind_beg := r_val.ind;

    ELSE

      SELECT Count(val) - Count(DISTINCT val)
        INTO l_is_dup
        FROM value_subseqs
       WHERE part_key = r_val.part_key
         AND ind      BETWEEN l_ind_beg AND r_val.ind;

      IF l_is_dup > 0 THEN

        l_group_no := l_group_no + 1;
        l_ind_beg := r_val.ind;

      END IF;

    END IF;

    PIPE ROW (value_subseq_type (r_val.part_key, r_val.ind, r_val.val, l_group_no));

  END LOOP;

END Sim_Model;

SQL
Just select the fields named in the record from the function wrapped in the TABLE keyword.

SELECT
    part_key,
    ind,
    val,
    grp_no
  FROM TABLE (Subseq_Groups.Sim_Model)
 ORDER BY part_key, ind

Performance Analysis
In SQL Pivot and Prune Queries - Keeping an Eye on Performance, in May 2011, I first applied an approach to performance testing of SQL queries whereby the queries are tested across a 2-dimensional domain, using a testing framework developed for that work. The same approach has been followed here, although the framework has been substantially improved and extended since then. In this case it may be of interest to observe performance across the following two dimensions:

  • Number of records per partition key
  • Average group size

However, as I prefer to randomise the test data, the group size is known only after querying the data set, so I will use a proxy dimension instead. The value field will be a string of 20 random capital letters (A-T) of length equal to the proxy dimension. As this length increases so will the average group size. Generally execution time would be expected to be proportional to number of partition keys when the other dimensions are fixed, and I will use 2 partition key values throughout.

Data Set 1
The first data set is chosen to keep the CPU times within reason for all queries, which limits the possible ranges (we’ll eliminate one query later and extend the ranges).

Output Record Counts

Depth/Width

W1

W2

W4

Records/Part>

100

200

400

D1

5

6

5

D2

25

24

24

D3

100

80

89

D4

100

200

267

CPU Times (Seconds)

Query

W1

W2

W4

W/Prior W Average

SQL Pairs

D1

2.11

8.49

33.99

4

D2

4.88

13.66

42.15

2.9

D3

10.3

46.71

255.64

5

D4

10.33

78.25

595.58

7.6

Model

D1

0.32

1.08

4.23

3.6

D2

0.31

1.14

4.23

3.7

D3

0.34

1.16

4.65

3.7

D4

0.36

1.36

4.86

3.7

Hash

D1

0.03

0.03

0.03

1

D2

0

0.01

0.03

2

D3

0.01

0.01

0.02

1.5

D4

0.02

0.01

0.02

1.3


Discussion

We can see immediately that on all data points there is the same performance ranking of the three queries and the differences are extreme. On W4-D4, SQL Pairs takes 123 times as long as Model, which in turn takes 243 times as long as Hash.

SQL Pairs
The Average Ratio figure in the table above is the average ratio between successive columns across the width dimension. On D1 this is 4, meaning that the CPU time has risen by the square of the width factor increase. On D8 it’s 7.6, being almost the cube of the factor. It appears that the performance varies with the square of the sequence length, except when the group size reaches the sequence length, when it becomes the cube. We would not consider this query for real problems when faster alternatives exist.

Model
The Average Ratio figure on all depths is about 3.7, meaning that the CPU time has risen by almost the square of the width factor increase. This is very surprising because, considering the algorithm one would assume to be effected by our query, if the group size remains constant then the work done in computing each group ought to be constant too, and the total work ought to rise by the same factor as the sequence length. We’ll look at this further in our second, larger data set, where we’ll also consider an apparently similar algorithm implemented in PL/SQL.

Hash
The Average Ratio figure varies between 1 and 2, but the CPU times are really too small for the figure to be considered reliable (note that the zero figure for W1-D2 was replaced by 0.005 in order to allow the log graph to include it). We can safely say, though, that this is faster by orders of magnitude even on very small problems, and will again look at a larger data set to see whether more can be said.

Data Set 2 (Second Query Set)
The second data set is chosen to give wider ranges, after excluding the Pairs query. A second function was added to replace it, labelled ‘Sim’ below and described above.

Output Record Counts

Depth/Width

W1

W2

W4

W8

W16

W32

Records/Part>

100

200

400

800

1600

3200

D1

5

5

5

5

5

5

D2

18

25

23

24

25

23

D3

50

80

89

84

119

110

D4

100

200

200

267

356

582

D5

100

200

400

533

1600

2133

D6

100

200

400

800

1600

3200

CPU Times (Seconds)

Query

W1

W2

W4

W8

W16

W32

W/Prior W Average

Hash

D1

0.02

0.01

0.01

0.03

0.06

0.10

1.6

D2

0.02

0.01

0.02

0.04

0.06

0.09

1.5

D3

0.02

0.02

0.02

0.04

0.06

0.09

1.4

D4

0.01

0.02

0.01

0.03

0.06

0.11

1.9

D5

0.01

0.03

0.02

0.05

0.06

0.09

1.8

D6

0.01

0.02

0.01

0.05

0.06

0.09

2.0

Model

D1

0.28

1.01

4.05

16.28

63.34

257.46

3.9

D2

0.27

1.06

4.00

15.97

66.27

249.99

3.9

D3

0.29

1.14

4.24

16.28

62.91

250.50

3.9

D4

0.33

1.24

4.74

17.66

69.00

263.34

3.8

D5

0.33

1.26

5.10

19.17

81.59

314.39

3.9

D6

0.33

1.28

4.99

20.55

80.80

331.38

4.0

Sim

D1

0.25

0.37

0.74

1.70

3.14

6.18

1.9

D2

0.28

0.59

1.21

2.42

4.73

9.28

2.0

D3

0.33

0.67

1.43

2.79

5.86

11.28

2.0

D4

0.34

0.77

1.58

3.15

6.97

14.71

2.1

D5

0.36

0.73

1.69

3.61

9.64

22.58

2.3

D6

0.36

0.73

1.71

3.79

9.43

26.45

2.4


Discussion

We can see immediately that on all data points there is the same performance ranking of the three queries and the differences are extreme. On W32-D6, Model takes 12 times as long as Sim, which in turn takes 294 times as long as Hash, Model being 3,678 slower than Hash. (I have included the elapsed times, which are very close to the CPU times, in the shared XL file above. I think the table data are being read from buffer cache throughout).

Model
The Average Ratio figure on all depths is about 3.9, meaning that the CPU time has risen by almost the square of the width factor increase. It seems that the internal algorithm applied from the Model query here is doing something different from what we would expect, and with dire consequences for performance. For what it's worth, here is the last Execution Plan:

---------------------------------------------------------------------------------------------------------------------------
| Id  | Operation            | Name          | Starts | E-Rows | A-Rows |   A-Time   | Buffers |  OMem |  1Mem | Used-Mem |
---------------------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT     |               |      1 |        |   6400 |00:05:33.45 |      30 |       |       |          |
|   1 |  SORT ORDER BY       |               |      1 |   6437 |   6400 |00:05:33.45 |      30 |   478K|   448K|  424K (0)|
|   2 |   SQL MODEL ORDERED  |               |      1 |   6437 |   6400 |05:57:01.43 |      30 |  1156K|   974K| 1002K (0)|
|   3 |    WINDOW SORT       |               |      1 |   6437 |   6400 |00:00:00.03 |      30 |   337K|   337K|  299K (0)|
|   4 |     TABLE ACCESS FULL| VALUE_SUBSEQS |      1 |   6437 |   6400 |00:00:00.01 |      30 |       |       |          |
---------------------------------------------------------------------------------------------------------------------------

Hash
The Average Ratio figure varies between 1.4 and 2, but the CPU times are probaby still too small for the figure to be considered reliable. We can again say, though, that this is faster than the Model solution by orders of magnitude even on very small problems and that the CPU time does not appear to be rising faster than linearly, so that the performance advantage will increase with problem size.

Sim
The Average Ratio figure varies between 1.9 and 2.4, and up to D3 is not more than 2, which indicates a pretty exact proportionality between sequence length and CPU time. This is consistent with our expectation of linearity so long as the group sizes are smaller than sequence lengths. For D6, where the group sizes are the same as the sequence lengths, we would expect to see a quadratic term (number of counts doubles, and work done in sorting/counting also doubles, if that is linear), and time in fact trebles between W16 and W32.
The results from this solution support the view that there is some internal implementation problem with Model for this example that is causing its quadratic CPU time variation. In my August 2011 revision of Forming Range-Based Break Groups with Advanced SQL, I noted significant under-performance in a query using analytic functions, that also seemed to due to an internal implementation problem, and found a work-around that made the query perform as expected. I believe both examples illustrate well the power of this kind of dimensional performance analysis.

Model Clause vs Pipelined Functions
I googled model performance problems and the two top-ranked articles are briefly discussed in the first two subsections below.
MODEL Performance Tuning
The author states: ‘In some cases MODEL query performance can even be so poor that it renders the query unusable. One of the keys to writing efficient and scalable MODEL queries seems to be keeping session memory use to a minimum’. Our first case would seem to fall into one of those cases, Model being 3,678 times slower than the function, at 332 seconds, on a problem of only 3,200 records (times two partition keys) and rising quadratically. The article considers the effects of changing various features of a test Model problem on the memory usage, assuming that that is one cause of poor performance.
From Pipelined Function to Model 
This article is interesting in that it takes pretty much the opposite line to my own. For a different problem, the author started with a pipelined function solution, and then went to Model on performance grounds. He says: ‘Since we were returning the rows in a pipelined (streaming) fashion, the performance was fine initially. It was when the function was called constantly and then joined with other tables that we ran into trouble’. The problem he identifies seems to be principally the fact that Oracle’s Cost Based Optimiser (CBO) cannot accurately predict the cardinality of the function, and assigns a default, on his system (as on mine) of 8168. This can cause poor execution plans when joined with other tables. His initial solution was to use the CARDINALITY hint, which worked but is undocumented and inflexible. He also notes possible performance issues caused by Oracle’s translating the PL/SQL table into an SQL result set and goes on to propose a Model solution to avoid this problem. Unfortunately, the author does not provide any results on significant data sets to demonstrate the performance differences. The following article looks specifically at the cardinality issue.
setting cardinality for pipelined and table functions
The author (Adrian Billington) considers four techniques that he labels thus:

  • CARDINALITY hint (9i+) undocumented
  • OPT_ESTIMATE hint (10g+) undocumented
  • DYNAMIC_SAMPLING hint (11.1.0.7+)
  • Extensible Optimiser (10g+)

The first two are not recommended on the grounds of being undocumented. The third option appears quite a lot simpler than the fourth and I will look at that approach in a second example problem, in my next article List Aggregation in Oracle - Comparing Three Methods.

Discussion
The pipelined function approach is plainly much faster than the SQL solutions in this example, but one has to be aware of possible issues such as the cardinality issue mentioned. One also needs to be aware that pure SQL statements are ‘read-consistent’ in Oracle, but this is not the case when functions are called that themselves do SQL.
Context switches between the SQL and PL/SQL engines, as well as the work done in translating between collections and SQL record sets, are often cited as performance reasons for preferring SQL-only solutions. As we have seen though, these issues, while real, can be dwarfed by algorithmic differences.

Conclusions

  • For the subsequence grouping problem addressed, using a pipelined function is faster by far than the SQL-only solutions identified
  • Although widely asserted, the notion that any query processing will be executed more efficiently in pure SQL than in PL/SQL is a myth
  • The Model solution using embedded aggregate Counts is much slower than expected and its quadratic CPU variation suggests performance problems within Oracle’s internal implementation of the Model clause
  • Dimensional performance analysis is very powerful although its use appears to be extremely rare in the Oracle community
  • It is suggested that diagrammatic techniques, such as my Query Structure Diagramming, although also very rarely used, offer important advantages for query documentation and design