如何启用sqlplus的AutoTrace功能

[color=darkorchid]关于Autotrace几个常用选项的说明:
SET AUTOTRACE OFF ---------------- 不生成AUTOTRACE 报告，这是缺省模式
SET AUTOTRACE ON EXPLAIN ------ AUTOTRACE只显示优化器执行路径报告
SET AUTOTRACE ON STATISTICS -- 只显示执行统计信息
SET AUTOTRACE ON ----------------- 包含执行计划和统计信息
SET AUTOTRACE TRACEONLY ------ 同set autotrace on，但是不显示查询输出

[color=darkorchid]补充两个AUTOTRACE
set autotrace traceonly exp
set autotrace traceonly exp stat

D:\oracle\ora92>sqlplus /nolog
SQL*Plus: Release 9.2.0.1.0 - Production on 星期二 6月 3 15:16:03 2003
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
SQL> connect sys as sysdba
请输入口令:
已连接。
SQL> @?\rdbms\admin\utlxplan
表已创建。
SQL> create public synonym plan_table for plan_table;
同义词已创建。
SQL> grant all on plan_table to public ;
授权成功。
SQL> @?\sqlplus\admin\plustrce
SQL> drop role plustrace;
drop role plustrace
*
ERROR 位于第 1 行:
ORA-01919: 角色'PLUSTRACE'不存在
SQL> create role plustrace;
角色已创建
SQL> grant select on v_$sesstat to plustrace;
授权成功。
SQL> grant select on v_$statname to plustrace;
授权成功。
SQL> grant select on v_$session to plustrace;
授权成功。
SQL> grant plustrace to dba with admin option;
授权成功。
DBA用户首先被授予了plustrace角色,然后我们可以把plustrace授予public
这样所有用户都将拥有plustrace角色的权限.
SQL> grant plustrace to public ;
授权成功。
然后我们就可以使用AutoTrace的功能了.
C:\Documents and Settings\Paul Yi>sqlplus paul/paul
SQL*Plus: Release 9.2.0.1.0 - Production on 星期四 6月 28 16:14:03 2007
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
连接到:
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production
SQL> set autotrace on
SQL> set timing on
SQL> select * from t_receive;

ID TELENO LOG_DATA U_
---------- ---------- ------------------- --
1 1234 2007-06-28 15:33:56 注
1 1234 2007-06-28 15:34:19 取
1 1235 2007-06-28 15:34:43 注
1 1235 2007-06-28 15:34:53 取
1 1235 2007-06-28 15:35:03 变

已用时间: 00: 00: 00.00

Execution Plan
----------------------------------------------------------
0 SELECT STATEMENT ptimizer=CHOOSE
1 0 TABLE ACCESS (FULL) OF 'T_RECEIVE'
Statistics
----------------------------------------------------------
0 recursive calls
0 db block gets
8 consistent gets
0 physical reads
0 redo size
644 bytes sent via SQL*Net to client
503 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
5 rows processed