Extract SQL Plan from AWR

이전에 사용자가 AWR에서 문제의 SQL 문장을 포지셔닝한 후에 이 SQL statement의 구체적인 집행 계획을 알고 싶어서 AWR 보고서에서 얻은 SQL ID로 V$SQL 등 몇 개의 동적 성능 보기에서 조회하였으나 V$SQL 또는 V$SQL 를 발견하였다PLAN 보기에서 SQL ID에 대한 기록을 찾을 수 없습니다. 일반적으로 이 문장들은shared pool 공유 탱크에서 대체되었습니다.이럴 때 DBMS를 사용해 볼 수 있어요XPLAN.DISPLAY_AWR 저장 프로세스는 다음과 같이 Oracle Automatic Workload Repository에서 창고에 기록된 SQL 문에 대한 정보를 자동으로 로드합니다.

SQL> set linesize 200 pagesize 2000;

SQL> select * from global_name;

GLOBAL_NAME
--------------------------------------------------------------------------------
oracledatabase12g.com

SQL> select /* extract_me */ count(*) from maclean;

  COUNT(*)
----------
      9564

SQL> select sql_id from v$sql where sql_text like '%extract_me%' and sql_text not like '%like%';

SQL_ID
-------------
8vff23q8qp9fj

SQL> exec dbms_workload_repository.create_snapshot;
PL/SQL procedure successfully completed.

QL> select * from table(dbms_xplan.display_cursor('8vff23q8qp9fj',0));

PLAN_TABLE_OUTPUT
-------------------------------------
SQL_ID  8vff23q8qp9fj, child number 0
-------------------------------------
select /* extract_me */ count(*) from maclean

Plan hash value: 1679547536

----------------------------------------------------------------------
| Id  | Operation          | Name    | Rows  | Cost (%CPU)| Time     |
----------------------------------------------------------------------
|   0 | SELECT STATEMENT   |         |       |    34 (100)|          |
|   1 |  SORT AGGREGATE    |         |     1 |            |          |
|   2 |   TABLE ACCESS FULL| MACLEAN | 10438 |    34   (0)| 00:00:01 |
----------------------------------------------------------------------

Note
-----
   - dynamic sampling used for this statement

18 rows selected.

/*       v$SQL/V$SQL_PLAN            ,
              AWR              ，      SQL       
 */

SQL> alter system flush shared_pool;
System altered.

SQL> select * from table(dbms_xplan.display_cursor('8vff23q8qp9fj',0));

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------
SQL_ID: 8vff23q8qp9fj, child number: 0 cannot be found

/*        dbms_xplan.display_awr        SQL_ID        */

SQL>  select * from table(dbms_xplan.display_awr('8vff23q8qp9fj'));

PLAN_TABLE_OUTPUT
--------------------------------------------------
SQL_ID 8vff23q8qp9fj
--------------------
select /* extract_me */ count(*) from maclean

Plan hash value: 1679547536

----------------------------------------------------------------------
| Id  | Operation          | Name    | Rows  | Cost (%CPU)| Time     |
----------------------------------------------------------------------
|   0 | SELECT STATEMENT   |         |       |    34 (100)|          |
|   1 |  SORT AGGREGATE    |         |     1 |            |          |
|   2 |   TABLE ACCESS FULL| MACLEAN | 10438 |    34   (0)| 00:00:01 |
----------------------------------------------------------------------

Note
-----
   - dynamic sampling used for this statement

18 rows selected.

/*       'all'             */

SQL> select * from table(dbms_xplan.display_awr('8vff23q8qp9fj',null,null,'all'));

PLAN_TABLE_OUTPUT
----------------------------------------------------------------------------
SQL_ID 8vff23q8qp9fj
--------------------
select /* extract_me */ count(*) from maclean

Plan hash value: 1679547536

----------------------------------------------------------------------
| Id  | Operation          | Name    | Rows  | Cost (%CPU)| Time     |
----------------------------------------------------------------------
|   0 | SELECT STATEMENT   |         |       |    34 (100)|          |
|   1 |  SORT AGGREGATE    |         |     1 |            |          |
|   2 |   TABLE ACCESS FULL| MACLEAN | 10438 |    34   (0)| 00:00:01 |
----------------------------------------------------------------------

Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------

   1 - SEL$1
   2 - SEL$1 / MACLEAN@SEL$1

Note
-----
   - dynamic sampling used for this statement

24 rows selected.

/*      dba_hist_sql_plan/dba_hist_sqltext awr          SQL ID      */

SQL> select OPERATION,OPTIONS,OBJECT_NAME from dba_hist_sql_plan where sql_id='8vff23q8qp9fj';

OPERATION                      OPTIONS                        OBJECT_NAME
------------------------------ ------------------------------ -------------------------------
SELECT STATEMENT
SORT                           AGGREGATE
TABLE ACCESS                   FULL                           MACLEAN