欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  数据库

解决autotrace不显示Predicate Information的问题

程序员文章站 2022-06-08 17:34:10
...

用autotrace在有的数据库上可以看到Predicate Information,有时候看不到,原因是plan_table版本旧所致,解决方法如下:

解决autotrace不显示Predicate Information的问题

首页 → 数据库技术

背景:

阅读新闻

解决autotrace不显示Predicate Information的问题

[日期:2013-11-08] 来源:Linux社区 作者:stevendbaguo [字体:]

用autotrace在有的数据库上可以看到Predicate Information,有时候看不到,原因是plan_table版本旧所致,解决方法如下:

SQL>set autotrace traceonly


处理方法:
drop table PLAN_TABLE;
@?/rdbms/admin/utlxplan

SQL> select u.name
2 from user u
3 where u.department_id in (select d.department_id from department d);

执行计划
----------------------------------------------------------
Plan hash value: 2264021098

----------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
----------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 5251 | 89267 | 15 (7)| 00:00:01 |
| 1 | NESTED LOOPS | | 5251 | 89267 | 15 (7)| 00:00:01 |
| 2 | TABLE ACCESS FULL| USER | 5273 | 63276 | 14 (0)| 00:00:01 |
|* 3 | INDEX UNIQUE SCAN| PK_DEPARTMENT | 1 | 5 | 0 (0)| 00:00:01 |
----------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
3 - access("U"."DEPARTMENT_ID"="D"."DEPARTMENT_ID")

统计信息
----------------------------------------------------------
0 recursive calls
0 db block gets
6024 consistent gets
0 physical reads
0 redo size
72158 bytes sent via SQL*Net to client
4156 bytes received via SQL*Net from client
348 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
5195 rows processed