利用WITH AS 优化FILTER

SQL> explain plan for select *

  from fxqd_list_20131115_new

 where (acct_no, oper_no, seqno, trans_amt) not in

       (select acct_no, oper_no, seqno, trans_amt

          from fxqd_list

         where reg_date = to_date('20131115', 'yyyymmdd'))

   and list_type = '1';  2    3    4    5    6    7  



Explained.



SQL> select * from table(dbms_xplan.display());



PLAN_TABLE_OUTPUT

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Plan hash value: 196590019



-------------------------------------------------------------------------------------------------------

| Id  | Operation                    | Name                   | Rows  | Bytes | Cost (%CPU)| Time     |

-------------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT             |                        |  4145 |    10M| 13079   (1)| 00:02:37 |

|*  1 |  FILTER                      |                        |       |       |            |          |

|*  2 |   TABLE ACCESS FULL          | FXQD_LIST_20131115_NEW |  4145 |    10M|   180   (2)| 00:00:03 |

|*  3 |   TABLE ACCESS BY INDEX ROWID| FXQD_LIST              |  2036 |   157K|     4   (0)| 00:00:01 |

|*  4 |    INDEX RANGE SCAN          | FXQD_LIST_IDX_1        |  2500 |       |     3   (0)| 00:00:01 |

-------------------------------------------------------------------------------------------------------



Predicate Information (identified by operation id):

---------------------------------------------------



   1 - filter( NOT EXISTS (SELECT /*+ */ 0 FROM "FXQD_LIST" "FXQD_LIST" WHERE

              "REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND LNNVL("ACCT_NO"<>:B1)

              AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND LNNVL("TRANS_AMT"<>:B4)))

   2 - filter("LIST_TYPE"='1')

   3 - filter(LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND

              LNNVL("TRANS_AMT"<>:B4))

   4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))



Note

-----

   - dynamic sampling used for this statement



26 rows selected.





查看特殊执行计划:

SQL> select * from table(dbms_xplan.display_cursor(null,null,'allstats last'));



PLAN_TABLE_OUTPUT

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

SQL_ID  fg7h5y1451z61, child number 0

-------------------------------------

select *   from fxqd_list_20131115_new  where (acct_no, oper_no, seqno, trans_amt) not in        (select acct_no,

oper_no, seqno, trans_amt           from fxqd_list          where reg_date = to_date('20131115', 'yyyymmdd'))

and list_type = '1'



Plan hash value: 196590019



--------------------------------------------------------------------------------------------------------------------------

| Id  | Operation                    | Name                   | Starts | E-Rows | A-Rows |   A-Time   | Buffers | Reads  |

--------------------------------------------------------------------------------------------------------------------------

|*  1 |  FILTER                      |                        |      1 |        |    103 |00:00:32.10 |    1563K|    225 |

|*  2 |   TABLE ACCESS FULL          | FXQD_LIST_20131115_NEW |      1 |   4145 |   4159 |00:00:00.13 |     795 |    225 |

|*  3 |   TABLE ACCESS BY INDEX ROWID| FXQD_LIST              |   4159 |   2036 |   4056 |00:00:31.95 |    1562K|      0 |

|*  4 |    INDEX RANGE SCAN          | FXQD_LIST_IDX_1        |   4159 |   2500 |     14M|00:00:03.55 |   67954 |      0 |

--------------------------------------------------------------------------------------------------------------------------



Predicate Information (identified by operation id):

---------------------------------------------------



   1 - filter( IS NULL)

   2 - filter("LIST_TYPE"='1')

   3 - filter((LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND

              LNNVL("TRANS_AMT"<>:B4)))

   4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))



Note

-----

   - dynamic sampling used for this statement





30 rows selected.



利用with as 改写:

SQL> with D as (select  /*+ materialize*/ acct_no, oper_no, seqno, trans_amt

          from fxqd_list

         where reg_date = to_date('20131115', 'yyyymmdd'))

   select * from fxqd_list_20131115_new where (acct_no, oper_no, seqno, trans_amt) not in

   (select acct_no, oper_no, seqno, trans_amt from D)

   and list_type = '1';  2    3    4    5    6  



103 rows selected.





Execution Plan

----------------------------------------------------------

Plan hash value: 2773456887



-------------------------------------------------------------------------------------------------------------

| Id  | Operation                     | Name                        | Rows  | Bytes | Cost (%CPU)| Time     |

-------------------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT              |                             |  4145 |    10M| 26570   (1)| 00:05:19 |

|   1 |  TEMP TABLE TRANSFORMATION    |                             |       |       |            |          |

|   2 |   LOAD AS SELECT              | FXQD_LIST_20131115_NEW      |       |       |            |          |

|   3 |    TABLE ACCESS BY INDEX ROWID| FXQD_LIST                   |  2500 |   192K|   389   (1)| 00:00:05 |

|*  4 |     INDEX RANGE SCAN          | FXQD_LIST_IDX_1             |  2500 |       |    10   (0)| 00:00:01 |

|*  5 |   FILTER                      |                             |       |       |            |          |

|*  6 |    TABLE ACCESS FULL          | FXQD_LIST_20131115_NEW      |  4145 |    10M|   180   (2)| 00:00:03 |

|*  7 |    VIEW                       |                             |  2500 |   170K|     8   (0)| 00:00:01 |

|   8 |     TABLE ACCESS FULL         | SYS_TEMP_0FD9D66DA_A4F53A1D |  2500 |   170K|     8   (0)| 00:00:01 |

-------------------------------------------------------------------------------------------------------------



Predicate Information (identified by operation id):

---------------------------------------------------



   4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))

   5 - filter( NOT EXISTS (SELECT /*+ */ 0 FROM  (SELECT /*+ CACHE_TEMP_TABLE ("T1") */ "C0"

              "ACCT_NO","C1" "OPER_NO","C2" "SEQNO","C3" "TRANS_AMT" FROM "SYS"."SYS_TEMP_0FD9D66DA_A4F53A1D"

              "T1") "D" WHERE LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND

              LNNVL("TRANS_AMT"<>:B4)))

   6 - filter("LIST_TYPE"='1')

   7 - filter(LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND

              LNNVL("TRANS_AMT"<>:B4))



Note

-----

   - dynamic sampling used for this statement





Statistics

----------------------------------------------------------

        171  recursive calls

         64  db block gets

     123638  consistent gets

         55  physical reads

       1556  redo size

      43694  bytes sent via SQL*Net to client

        558  bytes received via SQL*Net from client

          8  SQL*Net roundtrips to/from client

          0  sorts (memory)

          0  sorts (disk)

        103  rows processed





如果不加/*+ materialize*/ hints呢？

SQL> with D as (select   acct_no, oper_no, seqno, trans_amt

          from fxqd_list

         where reg_date = to_date('20131115', 'yyyymmdd'))

   select * from fxqd_list_20131115_new where (acct_no, oper_no, seqno, trans_amt) not in

   (select acct_no, oper_no, seqno, trans_amt from D)

   and list_type = '1';  2    3    4    5    6  



103 rows selected.





Execution Plan

----------------------------------------------------------

Plan hash value: 196590019



-------------------------------------------------------------------------------------------------------

| Id  | Operation                    | Name                   | Rows  | Bytes | Cost (%CPU)| Time     |

-------------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT             |                        |  4145 |    10M| 13079   (1)| 00:02:37 |

|*  1 |  FILTER                      |                        |       |       |            |          |

|*  2 |   TABLE ACCESS FULL          | FXQD_LIST_20131115_NEW |  4145 |    10M|   180   (2)| 00:00:03 |

|*  3 |   TABLE ACCESS BY INDEX ROWID| FXQD_LIST              |  2036 |   157K|     4   (0)| 00:00:01 |

|*  4 |    INDEX RANGE SCAN          | FXQD_LIST_IDX_1        |  2500 |       |     3   (0)| 00:00:01 |

-------------------------------------------------------------------------------------------------------



Predicate Information (identified by operation id):

---------------------------------------------------



   1 - filter( NOT EXISTS (SELECT /*+ */ 0 FROM "FXQD_LIST" "FXQD_LIST" WHERE

              "REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND LNNVL("ACCT_NO"<>:B1)

              AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND LNNVL("TRANS_AMT"<>:B4)))

   2 - filter("LIST_TYPE"='1')

   3 - filter(LNNVL("ACCT_NO"<>:B1) AND LNNVL("OPER_NO"<>:B2) AND LNNVL("SEQNO"<>:B3) AND

              LNNVL("TRANS_AMT"<>:B4))

   4 - access("REG_DATE"=TO_DATE(' 2013-11-15 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))



Note

-----

   - dynamic sampling used for this statement





Statistics

----------------------------------------------------------

         19  recursive calls

          0  db block gets

    1564063  consistent gets

          0  physical reads

          0  redo size

      43694  bytes sent via SQL*Net to client

        558  bytes received via SQL*Net from client

          8  SQL*Net roundtrips to/from client

          0  sorts (memory)

          0  sorts (disk)

        103  rows processed