Oracle利用coe_load_sql_profile脚本绑定执行计划

coe_load_sql_profile_v2.sql脚本利用的是profile原理，只是做了半自动的形式来使用，下面是测试过程。

coe_load_sql_profile_v2.txt 创建环境，构建测试表： SQL> create table t1 as select * from dba_objects where object_id is not null; Table created. SQL> alter table t1 modify object_id not null; Table altered. SQL> create index idx_t1_obj_id on t1(object_id); Index created. 索引不存储null值 SQL> analyze table t1 compute statistics; Table analyzed. SQL> select count(*) from t1;   COUNT(*) ----------      87070 SQL> select * from table(dbms_xplan.display_cursor(null,0)); PLAN_TABLE_OUTPUT -------------------------------------------------------------------------------------------------------------- SQL_ID 12c0v4my7dvr3, child number 0 ------------------------------------- select count(*) from t1 Plan hash value: 1657298618 ------------------------------------------------------------------------------------------------------- | Id  | Operation             | Name | Rows  | Cost (%CPU)| Time    | ------------------------------------------------------------------------------------------------------- |   0 | SELECT STATEMENT  |      |      |      54 (100)|      | |   1 |  SORT AGGREGAT    |      |     1 |       |      | PLAN_TABLE_OUTPUT -------------------------------------------------------------------------------------------------------------- |   2 |   INDEX FAST FULL SCAN| IDX_T1_OBJ_ID | 87070 |    54 (0)| 00:00:01 | ------------------------------------------------------------------------------- 14 rows selected. 会发现是进行的索引快速扫描。 使用hint提示，强行走全表扫描，然后生成执行计划。 SQL> select /*+ full(t1) */ count(*)from t1;   COUNT(*) ----------------------      87070 SQL> select * from table(dbms_xplan.display_cursor(null,0)); PLAN_TABLE_OUTPUT -------------------------------------------------------------------------------------------------------------- SQL_ID 20pat9zfypprh, child number 0 ------------------------------------- select /*+ full(t1) */ count(*)from t1 Plan hash value: 3724264953 ----------------------------------------------------------------------------------------------------- | Id  | Operation              | Name | Rows | Cost (%CPU)| Time   | ----------------------------------------------------------------------------------------------------- |   0 | SELECT STATEMENT   |  |  |    347 (100)|    | |   1 |  SORT AGGREGATE    |  | 1|          |    | PLAN_TABLE_OUTPUT -------------------------------------------------------------------------------------------------------------- |   2 |   TABLE ACCESS FULL| T1   | 87070 |   347   (1)| 00:00:05 | ------------------------------------------------------------------- 14 rows selected. SQL> @coe_load_sql_profile_v2.sql Parameter 1: SQL_ID (required) Enter value for 1: 12c0v4my7dvr3 PLAN_HASH_VALUE AVG_ET_SECS --------------- -----------      1657298618        .141 Parameter 2: PLAN_HASH_VALUE (required) Enter value for 2: 3724264953 Values passed to coe_xfr_sql_profile: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SQL_ID       : "12c0v4my7dvr3" PLAN_HASH_VALUE: "3724264953" 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_12c0v4my7dvr3_3724264953.sql on TARGET system in order to create a custom SQL Profile with plan 3724264953 linked to adjusted sql_text. .........省略 COE_XFR_SQL_PROFILE_12c0v4my7dvr3_3724264953 completed COE_XFR_SQL_PROFILE completed. SQL>explain plan for select count(*) from t1; Explained. SQL>select * from table(dbms_xplan.display()); PLAN_TABLE_OUTPUT ------------------------------------------------------------------------------------------ Plan hash value: 3724264953 ------------------------------------------------------------------- | Id  | Operation   | Name | Rows  | Cost (%CPU)| Time  | ------------------------------------------------------------------- |   0 | SELECT STATEMENT   |  | 1 |   347   (1)| 00:00:05 | |   1 |  SORT AGGREGATE    |  | 1 |       |  | |   2 |   TABLE ACCESS FULL| T1   | 87070 |   347   (1)| 00:00:05 | ------------------------------------------------------------------- Note PLAN_TABLE_OUTPUT ------------------------------------------------------------------------------------------ -----    - SQL profile "coe_12c0v4my7dvr3_3724264953" used for this statement 13 rows selected. SQL> select name,category,status,sql_text from dba_sql_profiles; NAME           CATEGORY   STATUS    SQL_TEXT ------------------------------------------- --------------------- ---------------- ------------------------------ coe_12c0v4my7dvr3_3724264953   DEFAULT  ENABLED  select count(*) from t1 可以看到脚本coe_load_sql_profile_v2.sql将执行计划固定了。