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.

COE_XFR_SQL_PROFILE

参考《基于SQL的优化》

秒客网

固定执行计划

一、历史执行计划固定

二、自己来构造合理的执行计划

1、构造执行计划

2、替换outline data

3、再次语句查看执行计划

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