一、历史执行计划固定
历史的执行计划找到一个合理的执行计划进行绑定
1. 存在多个执行计划的语句，按照索引是比较合适的，FULL SCAN不合适
select * from scott.emp where deptno=30
select * from table(dbms_xplan.display_cursor('4hpk08j31nm7y',null))
SQL_ID 4hpk08j31nm7y, child number 0
-------------------------------------
select * from scott.emp where deptno=30
Plan hash value: 1404472509
------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 2 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 6 | 228 | 2 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | INDEX_EMP_DEPTNO | 6 | | 1 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("DEPTNO"=30)
SQL_ID 4hpk08j31nm7y, child number 1
-------------------------------------
select * from scott.emp where deptno=30
Plan hash value: 3956160932
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 3 (100)| |
|* 1 | TABLE ACCESS FULL| EMP | 6 | 228 | 3 (0)| 00:00:01 |
--------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter("DEPTNO"=30)
存在两个执行计划，使之后的SQL语句都走Plan hash value: 1404472509 处理模
2、运行coe_xfr_sql_profile脚本来绑定
sys@GULL> @coe_xfr_sql_profile.SQL
Parameter 1:
SQL_ID (required)
输入 1 的值: 4hpk08j31nm7y
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
1404472509 .002
3956160932 .015
Parameter 2:
PLAN_HASH_VALUE (required)
输入 2 的值: 1404472509
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "4hpk08j31nm7y"
PLAN_HASH_VALUE: "1404472509"
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_4hpk08j31nm7y_1404472509.sql
on TARGET system in order to create a custom SQL Profile
with plan 1404472509 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
sys@GULL> @coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql
sys@GULL> REM
sys@GULL> REM $Header: 215187.1 coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql 11.4.3.5 2016/06/20 carlos.sierra $
sys@GULL> REM
sys@GULL> REM Copyright (c) 2000-2011, Oracle Corporation. All rights reserved.
sys@GULL> REM
sys@GULL> REM AUTHOR
sys@GULL> REM carlos.sierra@oracle.com
sys@GULL> REM
sys@GULL> REM SCRIPT
sys@GULL> REM coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql
sys@GULL> REM
sys@GULL> REM DESCRIPTION
sys@GULL> REM This script is generated by coe_xfr_sql_profile.sql
sys@GULL> REM It contains the SQL*Plus commands to create a custom
sys@GULL> REM SQL Profile for SQL_ID 4hpk08j31nm7y based on plan hash
sys@GULL> REM value 1404472509.
sys@GULL> REM The custom SQL Profile to be created by this script
sys@GULL> REM will affect plans for SQL commands with signature
sys@GULL> REM matching the one for SQL Text below.
sys@GULL> REM Review SQL Text and adjust accordingly.
sys@GULL> REM
sys@GULL> REM PARAMETERS
sys@GULL> REM None.
sys@GULL> REM
sys@GULL> REM EXAMPLE
sys@GULL> REM SQL> START coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql;
sys@GULL> REM
sys@GULL> REM NOTES
sys@GULL> REM 1. Should be run as SYSTEM or SYSDBA.
sys@GULL> REM 2. User must have CREATE ANY SQL PROFILE privilege.
sys@GULL> REM 3. SOURCE and TARGET systems can be the same or similar.
sys@GULL> REM 4. To drop this custom SQL Profile after it has been created:
sys@GULL> REM EXEC DBMS_SQLTUNE.DROP_SQL_PROFILE('coe_4hpk08j31nm7y_1404472509');
sys@GULL> REM 5. Be aware that using DBMS_SQLTUNE requires a license
sys@GULL> REM for the Oracle Tuning Pack.
sys@GULL> REM
sys@GULL> WHENEVER SQLERROR EXIT SQL.SQLCODE;
sys@GULL> REM
sys@GULL> VAR signature NUMBER;
sys@GULL> REM
sys@GULL> DECLARE
2 sql_txt CLOB;
3 h SYS.SQLPROF_ATTR;
4 BEGIN
5 sql_txt := q'[
6 select * from scott.emp where deptno=30
7 ]';
8 h := SYS.SQLPROF_ATTR(
9 q'[BEGIN_OUTLINE_DATA]',
10 q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
11 q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',
12 q'[DB_VERSION('11.2.0.3')]',
13 q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',
14 q'[ALL_ROWS]',
15 q'[OUTLINE_LEAF(@"SEL$1")]',
16 q'[INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."DEPTNO"))]',
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_4hpk08j31nm7y_1404472509',
23 description => 'coe 4hpk08j31nm7y 1404472509 '||:signature||'',
24 category => 'DEFAULT',
25 validate => TRUE,
26 replace => TRUE,
27 force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
28 END;
29 /
PL/SQL 过程已成功完成。
sys@GULL> WHENEVER SQLERROR CONTINUE
sys@GULL> SET ECHO OFF;
SIGNATURE
---------------------
7148830044791940844
... manual custom SQL Profile has been created
COE_XFR_SQL_PROFILE_4hpk08j31nm7y_1404472509 completed
执行COE_XFR_SQL_PROFILE_4hpk08j31nm7y_1404472509
3、再此重新执行语句
select * from scott.emp where deptno=30
select * from table(dbms_xplan.display_cursor(null,null))
SQL_ID 4hpk08j31nm7y, child number 2
-------------------------------------
select * from scott.emp where deptno=30
Plan hash value: 1404472509
------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 10 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 6 | 228 | 10 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | INDEX_EMP_DEPTNO | 6 | | 5 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("DEPTNO"=30)
Note
-----
- SQL profile coe_4hpk08j31nm7y_1404472509 used for this statement
SQL profile coe_4hpk08j31nm7y_1404472509 used for this statement，说明sql profile已经绑定上，执行计划已这个为最佳，为止绑定处理
二、自己来构造合理的执行计划
1、构造执行计划
以下例子中sql语句走的是全表扫描，没有走索引，构造一个走索引的语句，来替换全表扫描执行计划
alter session set optimizer_index_cost_adj=500
select * from scott.emp where deptno=30
select * from table(dbms_xplan.display_cursor(null,null))
SQL_ID 4hpk08j31nm7y, child number 0
-------------------------------------
select * from scott.emp where deptno=30
Plan hash value: 3956160932
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 3 (100)| |
|* 1 | TABLE ACCESS FULL| EMP | 6 | 228 | 3 (0)| 00:00:01 |
--------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter("DEPTNO"=30)
执行现存在的coe_xfr_sql_profile
sys@GULL> @coe_xfr_sql_profile.SQL
Parameter 1:
SQL_ID (required)
输入 1 的值: 4hpk08j31nm7y
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
3956160932 .041
Parameter 2:
PLAN_HASH_VALUE (required)
输入 2 的值: 3956160932
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "4hpk08j31nm7y"
PLAN_HASH_VALUE: "3956160932 "
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$sql_plan) or AWR (dba_hist_sql_plan).');
4 END IF;
5 END;
6 /
SQL>SET TERM OFF;
Execute coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql
on TARGET system in order to create a custom SQL Profile
with plan 3956160932 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
查看构造SQL的走索引执行计划coe_xfr_sql_profile
select /*+index(emp index_emp_deptno)*/ * from scott.emp where deptno=30
select * from table(dbms_xplan.display_cursor(null,null))
SQL_ID 2hdyvqk9b09va, child number 0
-------------------------------------
select /*+index(emp index_emp_deptno)*/ * from scott.emp where
deptno=30
Plan hash value: 1404472509
------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 10 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 6 | 228 | 10 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | INDEX_EMP_DEPTNO | 6 | | 5 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("DEPTNO"=30)
查看次构造SQL的coe_xfr_sql_profile
SQL>@coe_xfr_sql_profile.SQL 2hdyvqk9b09va
Parameter 1:
SQL_ID (required)
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
1404472509 .001
Parameter 2:
PLAN_HASH_VALUE (required)
输入 2 的值: 1404472509
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "2hdyvqk9b09va"
PLAN_HASH_VALUE: "1404472509"
SQL>BEGIN
2 IF :sql_text IS NULL THEN
3 RAISE_APPLICATION_ERROR(-20100, 'SQL_TEXT for SQL_ID &&sql_id. was not found in memory (gv$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_2hdyvqk9b09va_1404472509.sql
on TARGET system in order to create a custom SQL Profile
with plan 1404472509 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
2、替换outline data
查看coe_xfr_sql_profile_2hdyvqk9b09va_1404472509.sql信息，需要替换的是这段内容
h := SYS.SQLPROF_ATTR(
q'[BEGIN_OUTLINE_DATA]',
q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',
q'[DB_VERSION('11.2.0.3')]',
q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',
q'[OPT_PARAM('optimizer_index_cost_adj' 500)]',
q'[ALL_ROWS]',
q'[OUTLINE_LEAF(@"SEL$1")]',
q'[INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."DEPTNO"))]',
q'[END_OUTLINE_DATA]');
把这个内容替换到coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql 中
h := SYS.SQLPROF_ATTR(
q'[BEGIN_OUTLINE_DATA]',
q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',
q'[DB_VERSION('11.2.0.3')]',
q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',
q'[OPT_PARAM('optimizer_index_cost_adj' 500)]',
q'[ALL_ROWS]',
q'[OUTLINE_LEAF(@"SEL$1")]',
q'[FULL(@"SEL$1" "EMP"@"SEL$1")]',
q'[END_OUTLINE_DATA]');
这段信息后，执行coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql 这个脚本
SQL>@coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql
SQL>REM
SQL>REM $Header: 215187.1 coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql 11.4.3.5 2016/06/20 carlos.sierra $
SQL>REM
SQL>REM Copyright (c) 2000-2011, 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_4hpk08j31nm7y_3956160932.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 4hpk08j31nm7y based on plan hash
SQL>REM value 3956160932.
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_4hpk08j31nm7y_3956160932.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_4hpk08j31nm7y_3956160932');
SQL>REM 5. Be aware that using DBMS_SQLTUNE requires a license
SQL>REM for the Oracle Tuning Pack.
SQL>REM
SQL>WHENEVER SQLERROR EXIT SQL.SQLCODE;
SQL>REM
SQL>VAR signature NUMBER;
SQL>REM
SQL>DECLARE
2 sql_txt CLOB;
3 h SYS.SQLPROF_ATTR;
4 BEGIN
5 sql_txt := q'[
6 select * from scott.emp where deptno=30
7 ]';
8 h := SYS.SQLPROF_ATTR(
9 q'[BEGIN_OUTLINE_DATA]',
10 q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
11 q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',
12 q'[DB_VERSION('11.2.0.3')]',
13 q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',
14 q'[OPT_PARAM('optimizer_index_cost_adj' 500)]',
15 q'[ALL_ROWS]',
16 q'[OUTLINE_LEAF(@"SEL$1")]',
17 q'[INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."DEPTNO"))]',
18 q'[END_OUTLINE_DATA]');
19 :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
20 DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
21 sql_text => sql_txt,
22 profile => h,
23 name => 'coe_4hpk08j31nm7y_3956160932',
24 description => 'coe 4hpk08j31nm7y 3956160932 '||:signature||'',
25 category => 'DEFAULT',
26 validate => TRUE,
27 replace => TRUE,
28 force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
29 END;
30 /
PL/SQL 过程已成功完成。
SQL>WHENEVER SQLERROR CONTINUE
SQL>SET ECHO OFF;
SIGNATURE
---------------------
7148830044791940844
... manual custom SQL Profile has been created
COE_XFR_SQL_PROFILE_4hpk08j31nm7y_3956160932 completed
3、再次语句查看执行计划
select * from scott.emp where deptno=30
select * from table(dbms_xplan.display_cursor(null,null))
SQL_ID 4hpk08j31nm7y, child number 0
-------------------------------------
select * from scott.emp where deptno=30
Plan hash value: 1404472509
------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 10 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 6 | 228 | 10 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | INDEX_EMP_DEPTNO | 6 | | 5 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("DEPTNO"=30)
Note
-----
- SQL profile coe_4hpk08j31nm7y_3956160932 used for this statement
偷梁换柱成功，固定执行so easy
提供脚本文件COE_XFR_SQL_PROFILE.SQL
SPO coe_xfr_sql_profile.log; SET DEF ON TERM OFF ECHO ON FEED OFF VER OFF HEA ON LIN 2000 PAGES 100 LONG 8000000 LONGC 800000 TRIMS ON TI OFF TIMI OFF SERVEROUT ON SIZE 1000000 NUMF "" SQLP SQL>; SET SERVEROUT ON SIZE UNL; REM REM $Header: 215187.1 coe_xfr_sql_profile.sql 11.4.3.5 2011/08/10 carlos.sierra $ REM REM Copyright (c) 2000-2011, Oracle Corporation. All rights reserved. REM REM AUTHOR REM carlos.sierra@oracle.com REM REM SCRIPT REM coe_xfr_sql_profile.sql REM REM DESCRIPTION REM This script generates another that contains the commands to REM create a manual custom SQL Profile out of a known plan from REM memory or AWR. The manual custom profile can be implemented REM into the same SOURCE system where the plan was retrieved, REM or into another similar TARGET system that has same schema REM objects referenced by the SQL that generated the known plan. REM REM PRE-REQUISITES REM 1. Oracle Tuning Pack license. REM REM PARAMETERS REM 1. SQL_ID (required) REM 2. Plan Hash Value for which a manual custom SQL Profile is REM needed (required). A list of known plans is presented. REM REM EXECUTION REM 1. Connect into SQL*Plus as SYSDBA or user with access to REM data dictionary. REM 2. Execute script coe_xfr_sql_profile.sql passing SQL_ID and REM plan hash value (parameters can be passed inline or until REM requested). REM REM EXAMPLE REM # sqlplus system REM SQL> START coe_xfr_sql_profile.sql [SQL_ID] [PLAN_HASH_VALUE]; REM SQL> START coe_xfr_sql_profile.sql gnjy0mn4y9pbm 2055843663; REM SQL> START coe_xfr_sql_profile.sql gnjy0mn4y9pbm; REM SQL> START coe_xfr_sql_profile.sql; REM REM NOTES REM 1. For possible errors see coe_xfr_sql_profile.log REM 2. If SQLT is installed in SOURCE, you can use instead: REM sqlt/utl/sqltprofile.sql REM 3. Be aware that using DBMS_SQLTUNE requires a license for REM Oracle Tuning Pack. REM SET TERM ON ECHO OFF; PRO PRO Parameter 1: PRO SQL_ID (required) PRO DEF sql_id = '&1'; PRO WITH p AS ( SELECT plan_hash_value FROM gv$sql_plan WHERE sql_id = TRIM('&&sql_id.') AND other_xml IS NOT NULL UNION SELECT plan_hash_value FROM dba_hist_sql_plan WHERE sql_id = TRIM('&&sql_id.') AND other_xml IS NOT NULL ), m AS ( SELECT plan_hash_value, SUM(elapsed_time)/SUM(executions) avg_et_secs FROM gv$sql WHERE sql_id = TRIM('&&sql_id.') AND executions > 0 GROUP BY plan_hash_value ), a AS ( SELECT plan_hash_value, SUM(elapsed_time_total)/SUM(executions_total) avg_et_secs FROM dba_hist_sqlstat WHERE sql_id = TRIM('&&sql_id.') AND executions_total > 0 GROUP BY plan_hash_value ) SELECT p.plan_hash_value, ROUND(NVL(m.avg_et_secs, a.avg_et_secs)/1e6, 3) avg_et_secs FROM p, m, a WHERE p.plan_hash_value = m.plan_hash_value(+) AND p.plan_hash_value = a.plan_hash_value(+) ORDER BY avg_et_secs NULLS LAST; PRO PRO Parameter 2: PRO PLAN_HASH_VALUE (required) PRO DEF plan_hash_value = '&2'; PRO PRO Values passed to coe_xfr_sql_profile: PRO ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PRO SQL_ID : "&&sql_id." PRO PLAN_HASH_VALUE: "&&plan_hash_value." PRO SET TERM OFF ECHO ON; WHENEVER SQLERROR EXIT SQL.SQLCODE; -- trim parameters COL sql_id NEW_V sql_id FOR A30; COL plan_hash_value NEW_V plan_hash_value FOR A30; SELECT TRIM('&&sql_id.') sql_id, TRIM('&&plan_hash_value.') plan_hash_value FROM DUAL; VAR sql_text CLOB; VAR other_xml CLOB; EXEC :sql_text := NULL; EXEC :other_xml := NULL; -- get sql_text from memory DECLARE l_sql_text VARCHAR2(32767); BEGIN -- 10g see bug 5017909 FOR i IN (SELECT DISTINCT piece, sql_text FROM gv$sqltext_with_newlines WHERE sql_id = TRIM('&&sql_id.') ORDER BY 1, 2) LOOP IF :sql_text IS NULL THEN DBMS_LOB.CREATETEMPORARY(:sql_text, TRUE); DBMS_LOB.OPEN(:sql_text, DBMS_LOB.LOB_READWRITE); END IF; l_sql_text := REPLACE(i.sql_text, CHR(00), ' '); DBMS_LOB.WRITEAPPEND(:sql_text, LENGTH(l_sql_text), l_sql_text); END LOOP; IF :sql_text IS NOT NULL THEN DBMS_LOB.CLOSE(:sql_text); END IF; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('getting sql_text from memory: '||SQLERRM); :sql_text := NULL; END; / -- get sql_text from awr BEGIN IF :sql_text IS NULL OR NVL(DBMS_LOB.GETLENGTH(:sql_text), 0) = 0 THEN SELECT REPLACE(sql_text, CHR(00), ' ') INTO :sql_text FROM dba_hist_sqltext WHERE sql_id = TRIM('&&sql_id.') AND sql_text IS NOT NULL AND ROWNUM = 1; END IF; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('getting sql_text from awr: '||SQLERRM); :sql_text := NULL; END; / SELECT :sql_text FROM DUAL; -- validate sql_text SET TERM ON; BEGIN IF :sql_text IS NULL THEN RAISE_APPLICATION_ERROR(-20100, 'SQL_TEXT for SQL_ID &&sql_id. was not found in memory (gv$sqltext_with_newlines) or AWR (dba_hist_sqltext).'); END IF; END; / SET TERM OFF; -- to avoid errors when sql_text lacks LFs and is more than 2000 bytes BEGIN :sql_text := REPLACE(:sql_text, ')', ')'||CHR(10)); :sql_text := REPLACE(:sql_text, ',', ','||CHR(10)); -- remove consecutive LFs :sql_text := REPLACE(:sql_text, CHR(10)||CHR(10)||CHR(10)||CHR(10)||CHR(10), CHR(10)); :sql_text := REPLACE(:sql_text, CHR(10)||CHR(10)||CHR(10), CHR(10)); :sql_text := REPLACE(:sql_text, CHR(10)||CHR(10), CHR(10)); END; / SELECT :sql_text FROM DUAL; -- get other_xml from memory BEGIN FOR i IN (SELECT other_xml FROM gv$sql_plan WHERE sql_id = TRIM('&&sql_id.') AND plan_hash_value = TO_NUMBER(TRIM('&&plan_hash_value.')) AND other_xml IS NOT NULL ORDER BY child_number, id) LOOP :other_xml := i.other_xml; EXIT; -- 1st END LOOP; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('getting other_xml from memory: '||SQLERRM); :other_xml := NULL; END; / -- get other_xml from awr BEGIN IF :other_xml IS NULL OR NVL(DBMS_LOB.GETLENGTH(:other_xml), 0) = 0 THEN FOR i IN (SELECT other_xml FROM dba_hist_sql_plan WHERE sql_id = TRIM('&&sql_id.') AND plan_hash_value = TO_NUMBER(TRIM('&&plan_hash_value.')) AND other_xml IS NOT NULL ORDER BY id) LOOP :other_xml := i.other_xml; EXIT; -- 1st END LOOP; END IF; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('getting other_xml from awr: '||SQLERRM); :other_xml := NULL; END; / SELECT :other_xml FROM DUAL; -- validate other_xml SET TERM ON; BEGIN IF :other_xml IS NULL THEN RAISE_APPLICATION_ERROR(-20101, 'PLAN for SQL_ID &&sql_id. and PHV &&plan_hash_value. was not found in memory (gv$sql_plan) or AWR (dba_hist_sql_plan).'); END IF; END; / SET TERM OFF; -- generates script that creates sql profile in target system: SET ECHO OFF; PRO coe_xfr_sql_profile_&&sql_id._&&plan_hash_value..sql. SET FEED OFF LIN 666 TRIMS ON TI OFF TIMI OFF SERVEROUT ON SIZE 1000000 FOR WOR; SET SERVEROUT ON SIZE UNL FOR WOR; SPO OFF; SPO coe_xfr_sql_profile_&&sql_id._&&plan_hash_value..sql; DECLARE l_pos NUMBER; l_hint VARCHAR2(32767); BEGIN DBMS_OUTPUT.PUT_LINE('SPO coe_xfr_sql_profile_&&sql_id._&&plan_hash_value..log;'); DBMS_OUTPUT.PUT_LINE('SET ECHO ON TERM ON LIN 2000 TRIMS ON NUMF 99999999999999999999;'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM $Header: 215187.1 coe_xfr_sql_profile_&&sql_id._&&plan_hash_value..sql 11.4.3.5 '||TO_CHAR(SYSDATE, 'YYYY/MM/DD')||' carlos.sierra $'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM Copyright (c) 2000-2011, Oracle Corporation. All rights reserved.'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM AUTHOR'); DBMS_OUTPUT.PUT_LINE('REM carlos.sierra@oracle.com'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM SCRIPT'); DBMS_OUTPUT.PUT_LINE('REM coe_xfr_sql_profile_&&sql_id._&&plan_hash_value..sql'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM DESCRIPTION'); DBMS_OUTPUT.PUT_LINE('REM This script is generated by coe_xfr_sql_profile.sql'); DBMS_OUTPUT.PUT_LINE('REM It contains the SQL*Plus commands to create a custom'); DBMS_OUTPUT.PUT_LINE('REM SQL Profile for SQL_ID &&sql_id. based on plan hash'); DBMS_OUTPUT.PUT_LINE('REM value &&plan_hash_value..'); DBMS_OUTPUT.PUT_LINE('REM The custom SQL Profile to be created by this script'); DBMS_OUTPUT.PUT_LINE('REM will affect plans for SQL commands with signature'); DBMS_OUTPUT.PUT_LINE('REM matching the one for SQL Text below.'); DBMS_OUTPUT.PUT_LINE('REM Review SQL Text and adjust accordingly.'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM PARAMETERS'); DBMS_OUTPUT.PUT_LINE('REM None.'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM EXAMPLE'); DBMS_OUTPUT.PUT_LINE('REM SQL> START coe_xfr_sql_profile_&&sql_id._&&plan_hash_value..sql;'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('REM NOTES'); DBMS_OUTPUT.PUT_LINE('REM 1. Should be run as SYSTEM or SYSDBA.'); DBMS_OUTPUT.PUT_LINE('REM 2. User must have CREATE ANY SQL PROFILE privilege.'); DBMS_OUTPUT.PUT_LINE('REM 3. SOURCE and TARGET systems can be the same or similar.'); DBMS_OUTPUT.PUT_LINE('REM 4. To drop this custom SQL Profile after it has been created:'); DBMS_OUTPUT.PUT_LINE('REM EXEC DBMS_SQLTUNE.DROP_SQL_PROFILE(''coe_&&sql_id._&&plan_hash_value.'');'); DBMS_OUTPUT.PUT_LINE('REM 5. Be aware that using DBMS_SQLTUNE requires a license'); DBMS_OUTPUT.PUT_LINE('REM for the Oracle Tuning Pack.'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('WHENEVER SQLERROR EXIT SQL.SQLCODE;'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('VAR signature NUMBER;'); DBMS_OUTPUT.PUT_LINE('REM'); DBMS_OUTPUT.PUT_LINE('DECLARE'); DBMS_OUTPUT.PUT_LINE('sql_txt CLOB;'); DBMS_OUTPUT.PUT_LINE('h SYS.SQLPROF_ATTR;'); DBMS_OUTPUT.PUT_LINE('BEGIN'); DBMS_OUTPUT.PUT_LINE('sql_txt := q''['); WHILE NVL(LENGTH(:sql_text), 0) > 0 LOOP l_pos := INSTR(:sql_text, CHR(10)); IF l_pos > 0 THEN DBMS_OUTPUT.PUT_LINE(SUBSTR(:sql_text, 1, l_pos - 1)); :sql_text := SUBSTR(:sql_text, l_pos + 1); ELSE DBMS_OUTPUT.PUT_LINE(:sql_text); :sql_text := NULL; END IF; END LOOP; DBMS_OUTPUT.PUT_LINE(']'';'); DBMS_OUTPUT.PUT_LINE('h := SYS.SQLPROF_ATTR('); DBMS_OUTPUT.PUT_LINE('q''[BEGIN_OUTLINE_DATA]'','); FOR i IN (SELECT /*+ opt_param('parallel_execution_enabled', 'false') */ SUBSTR(EXTRACTVALUE(VALUE(d), '/hint'), 1, 4000) hint FROM TABLE(XMLSEQUENCE(EXTRACT(XMLTYPE(:other_xml), '/*/outline_data/hint'))) d) LOOP l_hint := i.hint; WHILE NVL(LENGTH(l_hint), 0) > 0 LOOP IF LENGTH(l_hint) <= 500 THEN DBMS_OUTPUT.PUT_LINE('q''['||l_hint||']'','); l_hint := NULL; ELSE l_pos := INSTR(SUBSTR(l_hint, 1, 500), ' ', -1); DBMS_OUTPUT.PUT_LINE('q''['||SUBSTR(l_hint, 1, l_pos)||']'','); l_hint := ' '||SUBSTR(l_hint, l_pos); END IF; END LOOP; END LOOP; DBMS_OUTPUT.PUT_LINE('q''[END_OUTLINE_DATA]'');'); DBMS_OUTPUT.PUT_LINE(':signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);'); DBMS_OUTPUT.PUT_LINE('DBMS_SQLTUNE.IMPORT_SQL_PROFILE ('); DBMS_OUTPUT.PUT_LINE('sql_text => sql_txt,'); DBMS_OUTPUT.PUT_LINE('profile => h,'); DBMS_OUTPUT.PUT_LINE('name => ''coe_&&sql_id._&&plan_hash_value.'','); DBMS_OUTPUT.PUT_LINE('description => ''coe &&sql_id. &&plan_hash_value. ''||:signature||'''','); DBMS_OUTPUT.PUT_LINE('category => ''DEFAULT'','); DBMS_OUTPUT.PUT_LINE('validate => TRUE,'); DBMS_OUTPUT.PUT_LINE('replace => TRUE,'); DBMS_OUTPUT.PUT_LINE('force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );'); DBMS_OUTPUT.PUT_LINE('END;'); DBMS_OUTPUT.PUT_LINE('/'); DBMS_OUTPUT.PUT_LINE('WHENEVER SQLERROR CONTINUE'); DBMS_OUTPUT.PUT_LINE('SET ECHO OFF;'); DBMS_OUTPUT.PUT_LINE('PRINT signature'); DBMS_OUTPUT.PUT_LINE('PRO'); DBMS_OUTPUT.PUT_LINE('PRO ... manual custom SQL Profile has been created'); DBMS_OUTPUT.PUT_LINE('PRO'); DBMS_OUTPUT.PUT_LINE('SET TERM ON ECHO OFF LIN 80 TRIMS OFF NUMF "";'); DBMS_OUTPUT.PUT_LINE('SPO OFF;'); DBMS_OUTPUT.PUT_LINE('PRO'); DBMS_OUTPUT.PUT_LINE('PRO COE_XFR_SQL_PROFILE_&&sql_id._&&plan_hash_value. completed'); END; / SPO OFF; SET DEF ON TERM ON ECHO OFF FEED 6 VER ON HEA ON LIN 80 PAGES 14 LONG 80 LONGC 80 TRIMS OFF TI OFF TIMI OFF SERVEROUT OFF NUMF "" SQLP SQL>; SET SERVEROUT OFF; PRO PRO Execute coe_xfr_sql_profile_&&sql_id._&&plan_hash_value..sql PRO on TARGET system in order to create a custom SQL Profile PRO with plan &&plan_hash_value linked to adjusted sql_text. PRO UNDEFINE 1 2 sql_id plan_hash_value CL COL PRO PRO COE_XFR_SQL_PROFILE completed.
参考《基于SQL的优化》