SQL Profiles-MANUAL
1、针对目标sql使用脚本coe_xfr_sql_profile.sql产生能生成其Manual类型的SQL Profile 的脚本A
2、改写目标sql的文本，在其中使用合适的hint，直到加入hint后的sql能走出我们想要的执行计划。然后对加入合适hint后的sql使用脚本coe_xfr_sql_profile.sql，产生能生成其Manual类型的SQL Profile的脚本B。
3、用脚本B中的Outline Data部分的hint组合替换掉脚本A中的Outline Data部分的hint组合。
4、执行脚本A生成针对原目标的SQL的Manual类型的SQL Profile。
模拟SQL走错执行计划
SYS@fyl>select /*+ no_index(t ind_n) */ * from t where n=3;
Execution Plan
----------------------------------------------------------
Plan hash value: 1601196873
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 2 | 26 | 30 (4)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| T | 2 | 26 | 30 (4)| 00:00:01 |
--------------------------------------------------------------------------
使用hint改写sql
SYS@fyl>select /*+ index(t ind_n) */ * from t where n=3;
N
----------
3
SYS@fyl>select * from table(dbms_xplan.display_cursor(null,null,'advanced'));
PLAN_TABLE_OUTPUT
-------------------------------------------------------------------------
SQL_ID 37bvrs54d4pu5, child number 0
-------------------------------------
select /*+ index(t ind_n) */ * from t where n=3
Plan hash value: 3063387565
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 1 (100)| |
|* 1 | INDEX RANGE SCAN| IND_N | 1 | 13 | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------
Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------
1 - SEL$1 / T@SEL$1
Outline Data
-------------
/*+
BEGIN_OUTLINE_DATA
IGNORE_OPTIM_EMBEDDED_HINTS
OPTIMIZER_FEATURES_ENABLE('11.2.0.1')
DB_VERSION('11.2.0.1')
ALL_ROWS
OUTLINE_LEAF(@"SEL$1")
INDEX(@"SEL$1" "T"@"SEL$1" ("T"."N"))
END_OUTLINE_DATA
*/
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("N"=3)
Column Projection Information (identified by operation id):
-----------------------------------------------------------
1 - "N"[NUMBER,22]
Note
-----
- dynamic sampling used for this statement (level=2)
46 rows selected.
SYS@fyl>select sql_text,sql_id,version_count from v$sqlarea where sql_text like '%index%n=3%';
SQL_TEXT SQL_ID VERSION_COUNT
------------------------------------------------------------ ------------- -------------
select /*+ index(t ind_n) */ * from t where n=3 37bvrs54d4pu5 1
select /*+ no_index(t ind_n) */ * from t where n=3 9wypc3n066q48 1
查询加入hint后的sql的plan_hash_value
SYS@fyl>select plan_hash_value from v$sql where sql_id='37bvrs54d4pu5';
PLAN_HASH_VALUE
---------------
3063387565
查询错误的sql的plan_hash_value
SYS@fyl>select plan_hash_value from v$sql where sql_id='9wypc3n066q48';
PLAN_HASH_VALUE
---------------
1601196873
1、针对原目标sql使用脚本coe_xfr_sql_profile.sql产生能生成其Manual类型的SQL Profile 的脚本，执行coe_xfr_sql_profile.sql的过程输入错误sql的sql_id和PLAN_HASH_VALUE。
SYS@fyl>@coe_xfr_sql_profile.sql
Parameter 1:
SQL_ID (required)
Enter value for 1: 9wypc3n066q48
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
1601196873 .058
Parameter 2:
PLAN_HASH_VALUE (required)
Enter value for 2: 1601196873
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "9wypc3n066q48"
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_9wypc3n066q48_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.2、对加入合适hint--index后的sql使用脚本coe_xfr_sql_profile.sql，产生能生成其Manual类型的SQL Profile的脚本。
SQL>@coe_xfr_sql_profile.sql
Parameter 1:
SQL_ID (required)
Enter value for 1: 37bvrs54d4pu5
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
3063387565 .01
Parameter 2:
PLAN_HASH_VALUE (required)
Enter value for 2: 3063387565
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "37bvrs54d4pu5"
PLAN_HASH_VALUE: "3063387565"
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_37bvrs54d4pu5_3063387565.sql
on TARGET system in order to create a custom SQL Profile
with plan 3063387565 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
错误sql的sql profile内容coe_xfr_sql_profile_9wypc3n066q48_1601196873.sql
。。。
DECLARE
sql_txt CLOB;
h SYS.SQLPROF_ATTR;
BEGIN
sql_txt := q'[
select /*+ no_index(t ind_n)
*/ * from t where n=3
]';
h := SYS.SQLPROF_ATTR(
q'[BEGIN_OUTLINE_DATA]',
q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.1')]',
q'[DB_VERSION('11.2.0.1')]',
q'[ALL_ROWS]',
q'[OUTLINE_LEAF(@"SEL$1")]',
q'[FULL(@"SEL$1" "T"@"SEL$1")]',
q'[END_OUTLINE_DATA]');
:signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
sql_text => sql_txt,
profile => h,
name => 'coe_9wypc3n066q48_1601196873',
description => 'coe 9wypc3n066q48 1601196873 '||:signature||'',
category => 'DEFAULT',
validate => TRUE,
replace => TRUE,
force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
END;
/
。。。
改写加入hint后的sql profile内容coe_xfr_sql_profile_37bvrs54d4pu5_3063387565.sql
。。。
DECLARE
sql_txt CLOB;
h SYS.SQLPROF_ATTR;
BEGIN
sql_txt := q'[
select /*+ index(t ind_n)
*/ * from t where n=3
]';
h := SYS.SQLPROF_ATTR(
q'[BEGIN_OUTLINE_DATA]',
q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.1')]',
q'[DB_VERSION('11.2.0.1')]',
q'[ALL_ROWS]',
q'[OUTLINE_LEAF(@"SEL$1")]',
q'[INDEX(@"SEL$1" "T"@"SEL$1" ("T"."N"))]',
q'[END_OUTLINE_DATA]');
:signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
sql_text => sql_txt,
profile => h,
name => 'coe_37bvrs54d4pu5_3063387565',
description => 'coe 37bvrs54d4pu5 3063387565 '||:signature||'',
category => 'DEFAULT',
validate => TRUE,
replace => TRUE,
force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURS
OR_SHARING) */ );
END;
/
。。。3、用脚本B中的Outline Data部分的hint组合替换掉脚本A中的Outline Data部分的hint组合。
用改写后的sql profile的hint组合替换原来sql profile的hint，并将原sql profile的force_match改为TRUE
4、执行脚本A生成针对原目标的SQL的Manual类型的SQL Profile。
SYS@fyl>@coe_xfr_sql_profile_9wypc3n066q48_1601196873.sql
SYS@fyl>REM
SYS@fyl>REM $Header: 215187.1 coe_xfr_sql_profile_9wypc3n066q48_1601196873.sql 11.4.3.5 2015/05/05 carlos.sierra $
SYS@fyl>REM
SYS@fyl>REM Copyright (c) 2000-2011, Oracle Corporation. All rights reserved.
SYS@fyl>REM
SYS@fyl>REM AUTHOR
SYS@fyl>REM [email protected]
SYS@fyl>REM
SYS@fyl>REM SCRIPT
SYS@fyl>REM coe_xfr_sql_profile_9wypc3n066q48_1601196873.sql
SYS@fyl>REM
SYS@fyl>REM DESCRIPTION
SYS@fyl>REM This script is generated by coe_xfr_sql_profile.sql
SYS@fyl>REM It contains the SQL*Plus commands to create a custom
SYS@fyl>REM SQL Profile for SQL_ID 9wypc3n066q48 based on plan hash
SYS@fyl>REM value 1601196873.
SYS@fyl>REM The custom SQL Profile to be created by this script
SYS@fyl>REM will affect plans for SQL commands with signature
SYS@fyl>REM matching the one for SQL Text below.
SYS@fyl>REM Review SQL Text and adjust accordingly.
SYS@fyl>REM
SYS@fyl>REM PARAMETERS
SYS@fyl>REM None.
SYS@fyl>REM
SYS@fyl>REM EXAMPLE
SYS@fyl>REM SQL> START coe_xfr_sql_profile_9wypc3n066q48_1601196873.sql;
SYS@fyl>REM
SYS@fyl>REM NOTES
SYS@fyl>REM 1. Should be run as SYSTEM or SYSDBA.
SYS@fyl>REM 2. User must have CREATE ANY SQL PROFILE privilege.
SYS@fyl>REM 3. SOURCE and TARGET systems can be the same or similar.
SYS@fyl>REM 4. To drop this custom SQL Profile after it has been created:
SYS@fyl>REM EXEC DBMS_SQLTUNE.DROP_SQL_PROFILE('coe_9wypc3n066q48_1601196873');
SYS@fyl>REM 5. Be aware that using DBMS_SQLTUNE requires a license
SYS@fyl>REM for the Oracle Tuning Pack.
SYS@fyl>REM
SYS@fyl>WHENEVER SQLERROR EXIT SQL.SQLCODE;
SYS@fyl>REM
SYS@fyl>VAR signature NUMBER;
SYS@fyl>REM
SYS@fyl>DECLARE
2 sql_txt CLOB;
3 h SYS.SQLPROF_ATTR;
4 BEGIN
5 sql_txt := q'[
6 select /*+ no_index(t ind_n)
7 */ * from t where n=3
8 ]';
9 h := SYS.SQLPROF_ATTR(
10 q'[BEGIN_OUTLINE_DATA]',
11 q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
12 q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.1')]',
13 q'[DB_VERSION('11.2.0.1')]',
14 q'[ALL_ROWS]',
15 q'[OUTLINE_LEAF(@"SEL$1")]',
16 q'[INDEX(@"SEL$1" "T"@"SEL$1" ("T"."N"))]',
17 q'[END_OUTLINE_DATA]');
18 :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
19 DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
20 sql_text => sql_txt,
21 profile => h,
22 name => 'coe_9wypc3n066q48_1601196873',
23 description => 'coe 9wypc3n066q48 1601196873 '||:signature||'',
24 category => 'DEFAULT',
25 validate => TRUE,
26 replace => TRUE,
27 force_match => TRUE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
28 END;
29 /
PL/SQL procedure successfully completed.
SYS@fyl>WHENEVER SQLERROR CONTINUE
SYS@fyl>SET ECHO OFF;
SIGNATURE
---------------------
14002184797686193519
... manual custom SQL Profile has been created
COE_XFR_SQL_PROFILE_9wypc3n066q48_1601196873 completed
验证：
SYS@fyl>select /*+ no_index(t ind_n) */ * from t where n=3;
Execution Plan
----------------------------------------------------------
Plan hash value: 3063387565
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 82 | 1066 | 1 (0)| 00:00:01 |
|* 1 | INDEX RANGE SCAN| IND_N | 82 | 1066 | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("N"=3)
Note
-----
- SQL profile "coe_9wypc3n066q48_1601196873" used for this statement