SQL Profile 實驗01
##建立測試表和資料
SQL> conn scott/tiger;
Connected.
SQL> create table t1 as select * from all_objects where rownum<=50000;
Table created.
SQL> create table t2 as select * from all_objects where rownum<=50000;
Table created.
##開啟autotrace 並執行SQL
SQL> set autotrace trace explain;
SQL>SELECT *
FROM t2 a, t1 b
WHERE a.object_id = b.object_id AND a.owner = b.owner AND a.object_id = 100;
Execution Plan
----------------------------------------------------------
Plan hash value: 2959412835
---------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 13 | 4108 | 401 (1)| 00:00:05 |
|* 1 | HASH JOIN | | 13 | 4108 | 401 (1)| 00:00:05 |
|* 2 | TABLE ACCESS FULL| T2 | 8 | 1264 | 200 (0)| 00:00:03 |
|* 3 | TABLE ACCESS FULL| T1 | 8 | 1264 | 201 (1)| 00:00:03 |
---------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("A"."OBJECT_ID"="B"."OBJECT_ID" AND
"A"."OWNER"="B"."OWNER")
2 - filter("A"."OBJECT_ID"=100)
3 - filter("B"."OBJECT_ID"=100)
Note
-----
- dynamic sampling used for this statement (level=2)
##在T1的object_id列建立索引
SQL> create index t1_idx on t1(object_id);
Index created.
##再次執行查詢並對比執行計劃
SQL>SELECT *
FROM t2 a, t1 b
WHERE a.object_id = b.object_id AND a.owner = b.owner AND a.object_id = 100;
Execution Plan
----------------------------------------------------------
Plan hash value: 2010545385
---------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 194 | 202 (0)| 00:00:03 |
| 1 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
| 2 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
|* 3 | TABLE ACCESS FULL | T2 | 1 | 97 | 200 (0)| 00:00:03 |
|* 4 | INDEX RANGE SCAN | T1_IDX | 1 | | 1 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID| T1 | 1 | 97 | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
3 - filter("A"."OBJECT_ID"=100)
4 - access("B"."OBJECT_ID"=100)
5 - filter("A"."OWNER"="B"."OWNER")
##查詢執行SQL對應的SQL_ID
SQL>select sql_id,sql_text from v$sql where sql_text like '%b.owner%' ;
bz1xauwq4cx7n
##利用sqlt的指令碼為SQL_ID建立profile，生成profile指令碼coe_xfr_sql_profile_bz1xauwq4cx7n_2010545385.sql
SQL> @coe_xfr_sql_profile.sql ##需要使用sys賬戶
Parameter 1:
SQL_ID (required)
Enter value for 1: bz1xauwq4cx7n ##輸入SQL_ID
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
2010545385
Parameter 2:
PLAN_HASH_VALUE (required)
Enter value for 2: 2010545385 ##輸入plan_hash_value
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "bz1xauwq4cx7n"
PLAN_HASH_VALUE: "2010545385"
SQL>BEGIN
2 IF :sql_text IS NULL THEN
3 RAISE_APPLICATION_ERROR(-20100, 'SQL_TEXT for SQL_ID &&sql_id. was not found in memory (gv$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_bz1xauwq4cx7n_2010545385.sql
on TARGET system in order to create a custom SQL Profile
with plan 2010545385 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
##匯入Profile檔案
SQL>@coe_xfr_sql_profile_bz1xauwq4cx7n_2010545385.sql
SQL>REM
SQL>REM $Header: 215187.1 coe_xfr_sql_profile_bz1xauwq4cx7n_2010545385.sql 11.4.4.4 2016/04/02 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_bz1xauwq4cx7n_2010545385.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 bz1xauwq4cx7n based on plan hash
SQL>REM value 2010545385.
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_bz1xauwq4cx7n_2010545385.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_bz1xauwq4cx7n_2010545385');
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 *
15 FROM t2 a, t1 b
16 WHERE a.object_id = b.object_id AN]');
17 wa(q'[D a.owner = b.owner AND a.object_id = 100]');
18 DBMS_LOB.CLOSE(sql_txt);
19 h := SYS.SQLPROF_ATTR(
20 q'[BEGIN_OUTLINE_DATA]',
21 q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
22 q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.4')]',
23 q'[DB_VERSION('11.2.0.4')]',
24 q'[ALL_ROWS]',
25 q'[OUTLINE_LEAF(@"SEL$1")]',
26 q'[FULL(@"SEL$1" "A"@"SEL$1")]',
27 q'[INDEX(@"SEL$1" "B"@"SEL$1" ("T1"."OBJECT_ID"))]',
28 q'[LEADING(@"SEL$1" "A"@"SEL$1" "B"@"SEL$1")]',
29 q'[USE_NL(@"SEL$1" "B"@"SEL$1")]',
30 q'[NLJ_BATCHING(@"SEL$1" "B"@"SEL$1")]',
31 q'[END_OUTLINE_DATA]');
32 :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
33 :signaturef := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt, TRUE);
34 DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
35 sql_text => sql_txt,
36 profile => h,
37 name => 'coe_bz1xauwq4cx7n_2010545385',
38 description => 'coe bz1xauwq4cx7n 2010545385 '||:signature||' '||:signaturef||'',
39 category => 'DEFAULT',
40 validate => TRUE,
41 replace => TRUE,
42 force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
43 DBMS_LOB.FREETEMPORARY(sql_txt);
44 END;
45 /
PL/SQL procedure successfully completed.
SQL>WHENEVER SQLERROR CONTINUE
SQL>SET ECHO OFF;
SIGNATURE
---------------------
12804301822878364520
SIGNATUREF
---------------------
10164005570873817823
... manual custom SQL Profile has been created
COE_XFR_SQL_PROFILE_bz1xauwq4cx7n_2010545385 completed
##重新執行SQL，檢視SQL執行計劃是不是用到Profile
SQL>SELECT *
FROM t2 a, t1 b
WHERE a.object_id = b.object_id AND a.owner = b.owner AND a.object_id = 100;
Execution Plan
----------------------------------------------------------
Plan hash value: 2010545385
---------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 194 | 202 (0)| 00:00:03 |
| 1 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
| 2 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
|* 3 | TABLE ACCESS FULL | T2 | 1 | 97 | 200 (0)| 00:00:03 |
|* 4 | INDEX RANGE SCAN | T1_IDX | 1 | | 1 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID| T1 | 1 | 97 | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
3 - filter("A"."OBJECT_ID"=100)
4 - access("B"."OBJECT_ID"=100)
5 - filter("A"."OWNER"="B"."OWNER")
Note
-----
- SQL profile "coe_bz1xauwq4cx7n_2010545385" used for this statement
##刪除Profile
begin
DBMS_SQLTUNE.DROP_SQL_PROFILE(name => 'coe_bz1xauwq4cx7n_2010545385');
end;
/
SQL> conn scott/tiger;
Connected.
SQL> create table t1 as select * from all_objects where rownum<=50000;
Table created.
SQL> create table t2 as select * from all_objects where rownum<=50000;
Table created.
##開啟autotrace 並執行SQL
SQL> set autotrace trace explain;
SQL>SELECT *
FROM t2 a, t1 b
WHERE a.object_id = b.object_id AND a.owner = b.owner AND a.object_id = 100;
Execution Plan
----------------------------------------------------------
Plan hash value: 2959412835
---------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 13 | 4108 | 401 (1)| 00:00:05 |
|* 1 | HASH JOIN | | 13 | 4108 | 401 (1)| 00:00:05 |
|* 2 | TABLE ACCESS FULL| T2 | 8 | 1264 | 200 (0)| 00:00:03 |
|* 3 | TABLE ACCESS FULL| T1 | 8 | 1264 | 201 (1)| 00:00:03 |
---------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("A"."OBJECT_ID"="B"."OBJECT_ID" AND
"A"."OWNER"="B"."OWNER")
2 - filter("A"."OBJECT_ID"=100)
3 - filter("B"."OBJECT_ID"=100)
Note
-----
- dynamic sampling used for this statement (level=2)
##在T1的object_id列建立索引
SQL> create index t1_idx on t1(object_id);
Index created.
##再次執行查詢並對比執行計劃
SQL>SELECT *
FROM t2 a, t1 b
WHERE a.object_id = b.object_id AND a.owner = b.owner AND a.object_id = 100;
Execution Plan
----------------------------------------------------------
Plan hash value: 2010545385
---------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 194 | 202 (0)| 00:00:03 |
| 1 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
| 2 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
|* 3 | TABLE ACCESS FULL | T2 | 1 | 97 | 200 (0)| 00:00:03 |
|* 4 | INDEX RANGE SCAN | T1_IDX | 1 | | 1 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID| T1 | 1 | 97 | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
3 - filter("A"."OBJECT_ID"=100)
4 - access("B"."OBJECT_ID"=100)
5 - filter("A"."OWNER"="B"."OWNER")
##查詢執行SQL對應的SQL_ID
SQL>select sql_id,sql_text from v$sql where sql_text like '%b.owner%' ;
bz1xauwq4cx7n
##利用sqlt的指令碼為SQL_ID建立profile，生成profile指令碼coe_xfr_sql_profile_bz1xauwq4cx7n_2010545385.sql
SQL> @coe_xfr_sql_profile.sql ##需要使用sys賬戶
Parameter 1:
SQL_ID (required)
Enter value for 1: bz1xauwq4cx7n ##輸入SQL_ID
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
2010545385
Parameter 2:
PLAN_HASH_VALUE (required)
Enter value for 2: 2010545385 ##輸入plan_hash_value
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "bz1xauwq4cx7n"
PLAN_HASH_VALUE: "2010545385"
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_bz1xauwq4cx7n_2010545385.sql
on TARGET system in order to create a custom SQL Profile
with plan 2010545385 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
##匯入Profile檔案
SQL>@coe_xfr_sql_profile_bz1xauwq4cx7n_2010545385.sql
SQL>REM
SQL>REM $Header: 215187.1 coe_xfr_sql_profile_bz1xauwq4cx7n_2010545385.sql 11.4.4.4 2016/04/02 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_bz1xauwq4cx7n_2010545385.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 bz1xauwq4cx7n based on plan hash
SQL>REM value 2010545385.
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_bz1xauwq4cx7n_2010545385.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_bz1xauwq4cx7n_2010545385');
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 *
15 FROM t2 a, t1 b
16 WHERE a.object_id = b.object_id AN]');
17 wa(q'[D a.owner = b.owner AND a.object_id = 100]');
18 DBMS_LOB.CLOSE(sql_txt);
19 h := SYS.SQLPROF_ATTR(
20 q'[BEGIN_OUTLINE_DATA]',
21 q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
22 q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.4')]',
23 q'[DB_VERSION('11.2.0.4')]',
24 q'[ALL_ROWS]',
25 q'[OUTLINE_LEAF(@"SEL$1")]',
26 q'[FULL(@"SEL$1" "A"@"SEL$1")]',
27 q'[INDEX(@"SEL$1" "B"@"SEL$1" ("T1"."OBJECT_ID"))]',
28 q'[LEADING(@"SEL$1" "A"@"SEL$1" "B"@"SEL$1")]',
29 q'[USE_NL(@"SEL$1" "B"@"SEL$1")]',
30 q'[NLJ_BATCHING(@"SEL$1" "B"@"SEL$1")]',
31 q'[END_OUTLINE_DATA]');
32 :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
33 :signaturef := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt, TRUE);
34 DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
35 sql_text => sql_txt,
36 profile => h,
37 name => 'coe_bz1xauwq4cx7n_2010545385',
38 description => 'coe bz1xauwq4cx7n 2010545385 '||:signature||' '||:signaturef||'',
39 category => 'DEFAULT',
40 validate => TRUE,
41 replace => TRUE,
42 force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
43 DBMS_LOB.FREETEMPORARY(sql_txt);
44 END;
45 /
PL/SQL procedure successfully completed.
SQL>WHENEVER SQLERROR CONTINUE
SQL>SET ECHO OFF;
SIGNATURE
---------------------
12804301822878364520
SIGNATUREF
---------------------
10164005570873817823
... manual custom SQL Profile has been created
COE_XFR_SQL_PROFILE_bz1xauwq4cx7n_2010545385 completed
##重新執行SQL，檢視SQL執行計劃是不是用到Profile
SQL>SELECT *
FROM t2 a, t1 b
WHERE a.object_id = b.object_id AND a.owner = b.owner AND a.object_id = 100;
Execution Plan
----------------------------------------------------------
Plan hash value: 2010545385
---------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 194 | 202 (0)| 00:00:03 |
| 1 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
| 2 | NESTED LOOPS | | 1 | 194 | 202 (0)| 00:00:03 |
|* 3 | TABLE ACCESS FULL | T2 | 1 | 97 | 200 (0)| 00:00:03 |
|* 4 | INDEX RANGE SCAN | T1_IDX | 1 | | 1 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID| T1 | 1 | 97 | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
3 - filter("A"."OBJECT_ID"=100)
4 - access("B"."OBJECT_ID"=100)
5 - filter("A"."OWNER"="B"."OWNER")
Note
-----
- SQL profile "coe_bz1xauwq4cx7n_2010545385" used for this statement
##刪除Profile
begin
DBMS_SQLTUNE.DROP_SQL_PROFILE(name => 'coe_bz1xauwq4cx7n_2010545385');
end;
/
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/27067062/viewspace-2074315/，如需轉載，請註明出處，否則將追究法律責任。
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