set_sql_trace_in_session PLS-00201

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问题：测试环境上非SYS用户想使用set_sql_trace_in_session跟踪会话信息，但遇到了PLS-00201错误。

解决方法：用sys用户登录授予用户有execute DBMS_SYSTEM的权限

grant execute on DBMS_SYSTEM to &username;

实验过程:

Connected to Oracle Database 10g Enterprise Edition Release 10.2.0.4.0
Connected as DEV

--.1从v$session中获取要跟踪的sid，serial#

SQL> SELECT sid ,serial# FROM v$session WHERE osuser='Liangwei';

       SID    SERIAL#
---------- ----------
       331      32948
       419      33910

--2.非sys用户，调用dbms_system.set_sql_trace_in_session，出错

SQL> EXEC dbms_system.set_sql_trace_in_session(sid =>'331' ,serial# =>'32948' ,sql_trace => TRUE);
begin dbms_system.set_sql_trace_in_session(sid =>'331' ,serial# =>'32948' ,sql_trace => TRUE); end;

ORA-06550: line 1, column 7:
PLS-00201: identifier 'DBMS_SYSTEM.SET_SQL_TRACE_IN_SESSION' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

--3.使用SYS用户授予dev用户execute DBMS_SYSTEM的权限
SQL> show user;
User is "SYS"

SQL> grant execute on DBMS_SYSTEM to dev;
Grant succeeded

SQL> show user;
User is "dev"

SQL> EXEC dbms_system.set_sql_trace_in_session(sid =>'331' ,serial# =>'32948' ,sql_trace => TRUE);

begin dbms_system.set_sql_trace_in_session(sid =>'331' ,serial# =>'32948' ,sql_trace => TRUE); end;

ORA-06550: line 1, column 7:
PLS-00201: identifier 'DBMS_SYSTEM.SET_SQL_TRACE_IN_SESSION' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

--4. 一定要加上sys

a）开启会话跟踪
SQL> EXEC sys.dbms_system.set_sql_trace_in_session(sid =>'331' ,serial# =>'32948' ,sql_trace => TRUE);
PL/SQL procedure successfully completed

。。。。等待331号sid执行SQL

b)结束会话跟踪

SQL> EXEC sys.dbms_system.set_sql_trace_in_session(sid =>'331' ,serial# =>'32948' ,sql_trace => FALSE);
PL/SQL procedure successfully completed

--5.udump目录下查看生成的dump文件
/oracle/app/admin/devdb/udump$ls -lrt
total 88
-rw-rw-rw-   1 oracle   dba               0 Jul 16 2009 sbtio.log
-rw-r--r--   1 oracle   dba           40741 Jun 03 11:10 13.txt
-rw-r-----   1 oracle   dba            3355 Jun 20 17:31 devdb_ora_8659146.trc