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oracle import sql profile

 

How to create SQL profile

Pickup the best hash from the history

SYS@TST3 $
@awr_plan_change_v2 0a99buvm9gszh

   SNAP_ID   NODE BEGIN_INTERVAL_TIME               SQL_ID        PLAN_HASH_VALUE        EXECS    AVG_ETIME        AVG_LIO
---------- ------ --------------------------------- ------------- --------------- ------------ ------------ --------------
         1      1 16-NOV-24 11.43.11.000 AM         0a99buvm9gszh      4020639609            4   11,964.283  137,065,366.8
         1      2 16-NOV-24 11.44.41.000 AM         0a99buvm9gszh                            2   11,985.675  145,016,795.0
     60593      1 28-FEB-25 11.00.29.449 AM         0a99buvm9gszh       389675671            2       38.798   18,428,828.0
     60593      2 28-FEB-25 11.00.29.454 AM         0a99buvm9gszh                            2       34.657   18,428,869.5
     60594      2 28-FEB-25 12.00.32.413 PM         0a99buvm9gszh                            2       33.034   18,426,252.0
     60698      1 04-MAR-25 08.00.06.974 PM         0a99buvm9gszh      4020639609            4      974.607   11,864,236.3
     60698      2 04-MAR-25 08.00.06.980 PM         0a99buvm9gszh                            2      998.371   12,389,792.0

Note: In this example 389675671 is the best plan.

Generate execution plan for the best hash.

select * from table(DBMS_XPLAN.DISPLAY_AWR(  '0a99buvm9gszh',389675671,null,'ADVANCED'))

It includes the Outline Data section

Outline Data
-------------
 
  /*+
      BEGIN_OUTLINE_DATA
      FULL(@"SEL$9" "P"@"SEL$9")
      USE_HASH(@"SEL$9" "P"@"SEL$9")
      INDEX_FFS(@"SEL$E41E6FF9" "P"@"SEL$10" ("PERSON"."PRSN_RK"))
      ...
      NLJ_BATCHING(@"SEL$25" "PE"@"SEL$25")
      INDEX_RS_ASC(@"SEL$24" "PEBE"@"SEL$24" ("PENSION_BENEFIT"."PLNIV_RK"))
      BATCH_TABLE_ACCESS_BY_ROWID(@"SEL$24" "PEBE"@"SEL$24")
      END_OUTLINE_DATA
  */

Create a profile script based on on the "Outline Data" information.


DECLARE
SQL_FTEXT CLOB;
BEGIN
SELECT SQL_FULLTEXT INTO SQL_FTEXT FROM V$SQLAREA WHERE SQL_ID = '0a99buvm9gszh';
DBMS_SQLTUNE.IMPORT_SQL_PROFILE(
  SQL_TEXT => SQL_FTEXT,
  profile => sqlprof_attr(
      q'^FULL(@"SEL$9" "P"@"SEL$9")^',
      q'^USE_HASH(@"SEL$9" "P"@"SEL$9")^',
      q'^INDEX_FFS(@"SEL$E41E6FF9" "P"@"SEL$10" ("PERSON"."PRSN_RK"))^',
      q'^USE_HASH(@"SEL$E41E6FF9" "P"@"SEL$10")^',
      q'^FULL(@"SEL$39A1367D" "PI"@"SEL$13")^',
...
      q'^USE_NL(@"SEL$25" "PC"@"SEL$25")^',
      q'^USE_NL(@"SEL$25" "PE"@"SEL$25")^',
      q'^NLJ_BATCHING(@"SEL$25" "PE"@"SEL$25")^',
      q'^INDEX_RS_ASC(@"SEL$24" "PEBE"@"SEL$24" ("PENSION_BENEFIT"."PLNIV_RK"))^',
      q'^BATCH_TABLE_ACCESS_BY_ROWID(@"SEL$24" "PEBE"@"SEL$24")^'
  ),
  NAME => 'Q_0pmcwss3rmj2y_389675671',
  REPLACE => TRUE,
  FORCE_MATCH => TRUE
);
END;
/

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