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coe_xfr_sql_profile脚本固定执行计划

IT影子 2023-06-17 阅读 106
coe_xfr_sql_profile固定执行计划Oracle数据库

create table t as select * from scott.emp;

select ename,empno from t where empno=7788;

ENAME                     EMPNO
-------------------- ----------
SCOTT                      7788

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

PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------
SQL_ID  6wk7ggz469b7u, child number 0
-------------------------------------
select ename,empno from t where empno=7788

Plan hash value: 1601196873

--------------------------------------------------------------------------
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |      |       |       |     2 (100)|          |
|*  1 |  TABLE ACCESS FULL| T    |     1 |    20 |     2   (0)| 00:00:01 |
--------------------------------------------------------------------------

create index idx_t on t(empno,ename);

@coe_xfr_sql_profile.sql 6wk7ggz469b7u 1601196873

coe_xfr_sql_profile_6wk7ggz469b7u_1601196873.sql


SQL> select ename,empno from t where empno=7788;

ENAME                     EMPNO
-------------------- ----------
SCOTT                      7788

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

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
SQL_ID  6wk7ggz469b7u, child number 0
-------------------------------------
select ename,empno from t where empno=7788

Plan hash value: 2296882198

--------------------------------------------------------------------------
| Id  | Operation        | Name  | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------
|   0 | SELECT STATEMENT |       |       |       |     1 (100)|          |
|*  1 |  INDEX RANGE SCAN| IDX_T |     1 |    20 |     1   (0)| 00:00:01 |

@coe_xfr_sql_profile.sql 6wk7ggz469b7u 2296882198

coe_xfr_sql_profile_6wk7ggz469b7u_2296882198.sql

2、生成脚本

SQL> @coe_xfr_sql_profile.sql 6wk7ggz469b7u 1601196873

Parameter 1:
SQL_ID (required)



PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
     2296882198        .002

Parameter 2:
PLAN_HASH_VALUE (required)


Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID         : "6wk7ggz469b7u"
PLAN_HASH_VALUE: "1601196873"

SQL>BEGIN
  2    IF :sql_text IS NULL THEN
  3      RAISE_APPLICATION_ERROR(-20100, 'SQL_TEXT for SQL_ID &&sql_id. was not found in memory (gv$sqltext_with_newlines) or AWR (dba_hist_sqltext).');
  4    END IF;
  5  END;
  6  /
SQL>SET TERM OFF;
SQL>BEGIN
  2    IF :other_xml IS NULL THEN
  3      RAISE_APPLICATION_ERROR(-20101, 'PLAN for SQL_ID &&sql_id. and PHV &&plan_hash_value. was not found in memory (gv$sql_plan) or AWR (dba_hist_sql_plan).');
  4    END IF;
  5  END;
  6  /
SQL>SET TERM OFF;

Execute coe_xfr_sql_profile_6wk7ggz469b7u_1601196873.sql
on TARGET system in order to create a custom SQL Profile
with plan 1601196873 linked to adjusted sql_text.


COE_XFR_SQL_PROFILE completed.

3、运行脚本

修改脚本coe_xfr_sql_profile_6wk7ggz469b7u_1601196873.sql 参数

force_match => TRUE （原值为FALSE）

SQL>@coe_xfr_sql_profile_6wk7ggz469b7u_1601196873.sql
SQL>REM
SQL>REM $Header: 215187.1 coe_xfr_sql_profile_6wk7ggz469b7u_1601196873.sql 11.4.4.4 2023/04/14 carlos.sierra $
SQL>REM
SQL>REM Copyright (c) 2000-2012, Oracle Corporation. All rights reserved.
SQL>REM
SQL>REM AUTHOR
SQL>REM   carlos.sierra@oracle.com
SQL>REM
SQL>REM SCRIPT
SQL>REM   coe_xfr_sql_profile_6wk7ggz469b7u_1601196873.sql
SQL>REM
SQL>REM DESCRIPTION
SQL>REM   This script is generated by coe_xfr_sql_profile.sql
SQL>REM   It contains the SQL*Plus commands to create a custom
SQL>REM   SQL Profile for SQL_ID 6wk7ggz469b7u based on plan hash
SQL>REM   value 1601196873.
SQL>REM   The custom SQL Profile to be created by this script
SQL>REM   will affect plans for SQL commands with signature
SQL>REM   matching the one for SQL Text below.
SQL>REM   Review SQL Text and adjust accordingly.
SQL>REM
SQL>REM PARAMETERS
SQL>REM   None.
SQL>REM
SQL>REM EXAMPLE
SQL>REM   SQL> START coe_xfr_sql_profile_6wk7ggz469b7u_1601196873.sql;
SQL>REM
SQL>REM NOTES
SQL>REM   1. Should be run as SYSTEM or SYSDBA.
SQL>REM   2. User must have CREATE ANY SQL PROFILE privilege.
SQL>REM   3. SOURCE and TARGET systems can be the same or similar.
SQL>REM   4. To drop this custom SQL Profile after it has been created:
SQL>REM  EXEC DBMS_SQLTUNE.DROP_SQL_PROFILE('coe_6wk7ggz469b7u_1601196873');
SQL>REM   5. Be aware that using DBMS_SQLTUNE requires a license
SQL>REM  for the Oracle Tuning Pack.
SQL>REM   6. If you modified a SQL putting Hints in order to produce a desired
SQL>REM  Plan, you can remove the artifical Hints from SQL Text pieces below.
SQL>REM  By doing so you can create a custom SQL Profile for the original
SQL>REM  SQL but with the Plan captured from the modified SQL (with Hints).
SQL>REM
SQL>WHENEVER SQLERROR EXIT SQL.SQLCODE;
SQL>REM
SQL>VAR signature NUMBER;
SQL>VAR signaturef NUMBER;
SQL>REM
SQL>DECLARE
  2  sql_txt CLOB;
  3  h       SYS.SQLPROF_ATTR;
  4  PROCEDURE wa (p_line IN VARCHAR2) IS
  5  BEGIN
  6  DBMS_LOB.WRITEAPPEND(sql_txt, LENGTH(p_line), p_line);
  7  END wa;
  8  BEGIN
  9  DBMS_LOB.CREATETEMPORARY(sql_txt, TRUE);
 10  DBMS_LOB.OPEN(sql_txt, DBMS_LOB.LOB_READWRITE);
 11  -- SQL Text pieces below do not have to be of same length.
 12  -- So if you edit SQL Text (i.e. removing temporary Hints),
 13  -- there is no need to edit or re-align unmodified pieces.
 14  wa(q'[select ename,empno from t where empno=7788]');
 15  DBMS_LOB.CLOSE(sql_txt);
 16  h := SYS.SQLPROF_ATTR(
 17  q'[BEGIN_OUTLINE_DATA]',
 18  q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
 19  q'[OPTIMIZER_FEATURES_ENABLE('19.1.0')]',
 20  q'[DB_VERSION('19.1.0')]',
 21  q'[ALL_ROWS]',
 22  q'[OUTLINE_LEAF(@"SEL$1")]',
 23  q'[FULL(@"SEL$1" "T"@"SEL$1")]',
 24  q'[END_OUTLINE_DATA]');
 25  :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
 26  :signaturef := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt, TRUE);
 27  DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
 28  sql_text    => sql_txt,
 29  profile     => h,
 30  name        => 'coe_6wk7ggz469b7u_1601196873',
 31  description => 'coe 6wk7ggz469b7u 1601196873 '||:signature||' '||:signaturef||'',
 32  category    => 'DEFAULT',
 33  validate    => TRUE,
 34  replace     => TRUE,
 35  force_match => TRUE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
 36  DBMS_LOB.FREETEMPORARY(sql_txt);
 37  END;
 38  /

PL/SQL procedure successfully completed.

SQL>WHENEVER SQLERROR CONTINUE
SQL>SET ECHO OFF;

            SIGNATURE
---------------------
  5123411738372664700


           SIGNATUREF
---------------------
  3065794480876030305


... manual custom SQL Profile has been created


COE_XFR_SQL_PROFILE_6wk7ggz469b7u_1601196873 completed

4、验证

SQL>select ename,empno from t where empno=7788;

ENAME                     EMPNO
-------------------- ----------
SCOTT                      7788

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

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
SQL_ID  6wk7ggz469b7u, child number 0
-------------------------------------
select ename,empno from t where empno=7788

Plan hash value: 1601196873

--------------------------------------------------------------------------
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |      |       |       |     2 (100)|          |
|*  1 |  TABLE ACCESS FULL| T    |     1 |    20 |     2   (0)| 00:00:01 |

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
--------------------------------------------------------------------------

Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------

   1 - SEL$1 / T@SEL$1

Outline Data
-------------

  /*+

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
      BEGIN_OUTLINE_DATA
      IGNORE_OPTIM_EMBEDDED_HINTS
      OPTIMIZER_FEATURES_ENABLE('19.1.0')
      DB_VERSION('19.1.0')
      ALL_ROWS
      OUTLINE_LEAF(@"SEL$1")
      FULL(@"SEL$1" "T"@"SEL$1")
      END_OUTLINE_DATA
  */

Predicate Information (identified by operation id):

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
---------------------------------------------------

   1 - filter("EMPNO"=7788)

Column Projection Information (identified by operation id):
-----------------------------------------------------------

   1 - "EMPNO"[NUMBER,22], "ENAME"[VARCHAR2,10]

Hint Report (identified by operation id / Query Block Name / Object Alias):
Total hints for statement: 5

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
---------------------------------------------------------------------------

   0 -  STATEMENT
           -  ALL_ROWS
           -  DB_VERSION('19.1.0')
           -  IGNORE_OPTIM_EMBEDDED_HINTS
           -  OPTIMIZER_FEATURES_ENABLE('19.1.0')

   1 -  SEL$1 / T@SEL$1
           -  FULL(@"SEL$1" "T"@"SEL$1")


PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
Note
-----
   - dynamic statistics used: dynamic sampling (level=2)
   - SQL profile coe_6wk7ggz469b7u_1601196873 used for this statement

Query Block Registry:
---------------------

  <q o="2" f="y"><n><![CDATA[SEL$1]]></n><f><h><t><![CDATA[T]]></t><s><![C
        DATA[SEL$1]]></s></h></f></q>


PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------


67 rows selected.

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