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使用coe_load_sql_profile.sql固定执行计划

2022-06-25 22:13:00 【文档搬运工】

参考文档：

Directing Plans with Baselines/Profiles Using coe_load_sql_baseline.sql / coe_load_sql_profile.sql (shipped with SQLT) (Doc ID 1400903.1)

-- 在emp上创建索引

[email protected]>create index i_emp_ename on emp(ename);

Index created.

[email protected]>

-- 收集统计信息

exec dbms_stats.gather_table_stats(ownname=>'BB',tabname=>'EMP')
[email protected]>exec dbms_stats.gather_table_stats(ownname=>'BB',tabname=>'EMP');

PL/SQL procedure successfully completed.

[email protected]>

-- 运行原始的SQL

select ename from emp where ename='name';

[email protected]>select ename from emp where ename='name';

no rows selected


Execution Plan
----------------------------------------------------------
Plan hash value: 4001599462

--------------------------------------------------------------------------------
| Id  | Operation        | Name        | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------------
|   0 | SELECT STATEMENT |             |     1 |     6 |     1   (0)| 00:00:01 |
|*  1 |  INDEX RANGE SCAN| I_EMP_ENAME |     1 |     6 |     1   (0)| 00:00:01 |
--------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - access("ENAME"='name')


Statistics
----------------------------------------------------------
          1  recursive calls
          0  db block gets
          1  consistent gets
          0  physical reads
          0  redo size
        548  bytes sent via SQL*Net to client
        391  bytes received via SQL*Net from client
          2  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          0  rows processed

[email protected]>

-- 运行加了hint的sql

select /*+ FULL (EMP) */ ename from emp where ename='name';

[email protected]>select /*+ FULL (EMP) */ ename from emp where ename='name';

no rows selected


Execution Plan
----------------------------------------------------------
Plan hash value: 3956160932

--------------------------------------------------------------------------
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |      |     1 |     6 |     3   (0)| 00:00:01 |
|*  1 |  TABLE ACCESS FULL| EMP  |     1 |     6 |     3   (0)| 00:00:01 |
--------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("ENAME"='name')


Statistics
----------------------------------------------------------
          1  recursive calls
          0  db block gets
          2  consistent gets
          0  physical reads
          0  redo size
        349  bytes sent via SQL*Net to client
        409  bytes received via SQL*Net from client
          1  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          0  rows processed

[email protected]>

-- 查询两个SQL语句的SQL ID和plan hash value ，原始的SQL ID 66q0r9w4df2f5 ,plan hash 4001599462 , 修改后的SQLID 3w056txhg3vdu ，ｐｌａｎｈａｓｈ 3956160932

select sql_id ,plan_hash_value, sql_text from v$sql where sql_text like '%emp%';

select sql_id ,plan_hash_value, sql_text from v$sql where sql_text like '%ename=%'
[email protected]>/

SQL_ID        PLAN_HASH_VALUE
------------- ---------------
SQL_TEXT
--------------------------------------------------------------------------------------------------------------------------------------------
bzb3b959pd6yp      4001599462
EXPLAIN PLAN SET STATEMENT_ID='PLUS401365' FOR select ename from emp where ename='name'

66q0r9w4df2f5      4001599462
select ename from emp where ename='name'

3w056txhg3vdu      3956160932
select /*+ FULL (EMP) */ ename from emp where ename='name'


SQL_ID        PLAN_HASH_VALUE
------------- ---------------
SQL_TEXT
--------------------------------------------------------------------------------------------------------------------------------------------
3jykb0m137vfj      3956160932
EXPLAIN PLAN SET STATEMENT_ID='PLUS401365' FOR select /*+ FULL (EMP) */ ename from emp where ename='name'

7g6bm1swrzzmv       903671040
select sql_id ,plan_hash_value, sql_text from v$sql where sql_text like '%ename=%'


[email protected]>

-- 使用coe_load_sql_profile.sql

[email protected]>conn system/oracle
ERROR:
ORA-28002: the password will expire within 7 days


Connected.
[email protected]>@/tmp/coe_load_sql_profile.sql

Parameter 1:
ORIGINAL_SQL_ID (required)

Enter value for 1: 66q0r9w4df2f5

Parameter 2:
MODIFIED_SQL_ID (required)

Enter value for 2: 3w056txhg3vdu


     PLAN_HASH_VALUE          AVG_ET_SECS
-------------------- --------------------
          3956160932                 .001

Parameter 3:
PLAN_HASH_VALUE (required)

Enter value for 3: 3956160932

Values passed to coe_load_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ORIGINAL_SQL_ID: "66q0r9w4df2f5"
MODIFIED_SQL_ID: "3w056txhg3vdu"
PLAN_HASH_VALUE: "3956160932"

SQL>BEGIN
  2    IF :sql_text IS NULL THEN
  3      RAISE_APPLICATION_ERROR(-20100, 'SQL_TEXT for original SQL_ID &&original_sql_id. was not found in memory (gv$sqltext_with_newlines) or AWR (dba_hist_sqltext).');
  4    END IF;
  5  END;
  6  /
SQL>SET TERM OFF;
SQL>BEGIN
  2    IF :other_xml IS NULL THEN
  3      RAISE_APPLICATION_ERROR(-20101, 'PLAN for modified SQL_ID &&modified_sql_id. and PHV &&plan_hash_value. was not found in memory (gv$sql_plan) or AWR (dba_hist_sql_plan).');
  4    END IF;
  5  END;
  6  /
SQL>
SQL>SET ECHO OFF;
0001 BEGIN_OUTLINE_DATA
0002 IGNORE_OPTIM_EMBEDDED_HINTS
0003 OPTIMIZER_FEATURES_ENABLE('19.1.0')
0004 DB_VERSION('19.1.0')
0005 ALL_ROWS
0006 OUTLINE_LEAF(@"SEL$1")
0007 FULL(@"SEL$1" "EMP"@"SEL$1")
0008 END_OUTLINE_DATA
dropping staging table "STGTAB_SQLPROF_66Q0R9W4DF2F5"
staging table "STGTAB_SQLPROF_66Q0R9W4DF2F5" did not exist
creating staging table "STGTAB_SQLPROF_66Q0R9W4DF2F5"
packaging new sql profile into staging table "STGTAB_SQLPROF_66Q0R9W4DF2F5"

PROFILE_NAME
------------------------------
66Q0R9W4DF2F5_3956160932
SQL>REM
SQL>REM SQL Profile
SQL>REM ~~~~~~~~~~~
SQL>REM
SQL>SELECT signature, name, category, type, status
  2    FROM dba_sql_profiles WHERE name = :name;

           SIGNATURE NAME                                                                                                     CATEGORY                                                                                                                  TYPE    STATUS
-------------------- -------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------- ------- --------
10938475214343355302 66Q0R9W4DF2F5_3956160932                                                                                 DEFAULT                                                                                                                   MANUAL  ENABLED
SQL>SELECT description
  2    FROM dba_sql_profiles WHERE name = :name;

DESCRIPTION
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ORIGINAL:66Q0R9W4DF2F5 MODIFIED:3W056TXHG3VDU PHV:3956160932 SIGNATURE:10938475214343355302 CREATED BY COE_LOAD_SQL_PROFILE.SQL
SQL>SET ECHO OFF;

****************************************************************************
* Enter SYSTEM password to export staging table STGTAB_SQLPROF_66q0r9w4df2f5
****************************************************************************

Export: Release 19.0.0.0.0 - Production on Thu Dec 2 01:49:23 2021
Version 19.5.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

Password: 

EXP-00056: ORACLE error 28002 encountered
ORA-28002: the password will expire within 7 days
Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.5.0.0.0
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses AL32UTF8 character set (possible charset conversion)
Note: grants on tables/views/sequences/roles will not be exported
Note: indexes on tables will not be exported
Note: constraints on tables will not be exported

About to export specified tables via Conventional Path ...
. . exporting table   STGTAB_SQLPROF_66Q0R9W4DF2F5          1 rows exported
Export terminated successfully without warnings.


If you need to implement this Custom SQL Profile on a similar system,
import and unpack using these commands:

imp SYSTEM file=STGTAB_SQLPROF_66q0r9w4df2f5.dmp tables=STGTAB_SQLPROF_66q0r9w4df2f5 ignore=Y

BEGIN
DBMS_SQLTUNE.UNPACK_STGTAB_SQLPROF (
profile_name => '66Q0R9W4DF2F5_3956160932',
replace => TRUE,
staging_table_name => 'STGTAB_SQLPROF_66q0r9w4df2f5',
staging_schema_owner => 'SYSTEM' );
END;
/

  adding: coe_load_sql_profile_66q0r9w4df2f5.log (deflated 76%)
  adding: STGTAB_SQLPROF_66q0r9w4df2f5.dmp (deflated 86%)
  adding: coe_load_sql_profile.log (deflated 62%)

deleting: coe_load_sql_profile.log


coe_load_sql_profile completed.
SQL>

-- 运行原始的SQL语句进行查询，可以看到使用了SQL PROFILE。执行了全表扫描

select ename from emp where ename='name';

[email protected]>select ename from emp where ename='name';

no rows selected


Execution Plan
----------------------------------------------------------
Plan hash value: 3956160932

--------------------------------------------------------------------------
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |      |     1 |     6 |     3   (0)| 00:00:01 |
|*  1 |  TABLE ACCESS FULL| EMP  |     1 |     6 |     3   (0)| 00:00:01 |
--------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("ENAME"='name')

Note
-----
   - SQL profile "66Q0R9W4DF2F5_3956160932" used for this statement


Statistics
----------------------------------------------------------
          8  recursive calls
          0  db block gets
          5  consistent gets
          1  physical reads
          0  redo size
        349  bytes sent via SQL*Net to client
        391  bytes received via SQL*Net from client
          1  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          0  rows processed

[email protected]>

-- 官方文档中，使用SQL_base_line (略)

SQL> @coe_load_sql_baseline.sql

Parameter 1:
ORIGINAL_SQL_ID (required)

Enter value for 1: 329d885bxvrcr

Parameter 2:
MODIFIED_SQL_ID (required)

Enter value for 2: 4f74t4ab7rd5y


     PLAN_HASH_VALUE          AVG_ET_SECS
-------------------- --------------------
          2872589290                 .003

Parameter 3:
PLAN_HASH_VALUE (required)

Enter value for 3:  2872589290

Values passed to coe_load_sql_baseline:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ORIGINAL_SQL_ID: "329d885bxvrcr"
MODIFIED_SQL_ID: "4f74t4ab7rd5y"
PLAN_HASH_VALUE: " 2872589290"
.
.
.

****************************************************************************
* Enter <User_Name> password to export staging table STGTAB_BASELINE_329d885bxvrcr
****************************************************************************

Export: Release 11.2.0.3.0 - Production on Sun Mar 11 15:08:56 2012

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

Password:

.
.
.
deleting: coe_load_sql_baseline.log


coe_load_sql_baseline completed.

-- 查看结果

SQL> select ename from emp where ename='name';
Plan hash value: 2872589290

--------------------------------------------------------------------------
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |      |     1 |     6 |     3   (0)| 00:00:01 |
|*  1 |  TABLE ACCESS FULL| EMP  |     1 |     6 |     3   (0)| 00:00:01 |
--------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("ENAME"='name')

Note
-----
   - SQL plan baseline "329D885BXVRCR_4F74T4AB7RD5Y" used for this statement
   
   
END

END

-- 2022-01-06 add

--查询sqlprofile

select * from dba_sql_profiles

-- 清理sqlprofile

DBMS_SQLTUNE.DROP_SQL_PROFILE(name => 'CFASMT43SSN4U_1445457117')

END

原网站

版权声明
本文为[文档搬运工]所创，转载请带上原文链接，感谢
https://oracledocs.blog.csdn.net/article/details/121664057

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