使用ORACLE的AUTOTRACE功能可以自动跟踪SQL语句并可以根据选项生成执行计划，下面就说一下如何产生执行表，启用AUTOTRACE功能：
1、cd $oracle_home/rdbms/admin
2、log into sqlplus as system
3、run SQL> @utlxplan
4、run SQL> create public synonym plan_table for plan_table
5、run SQL> grant all on plan_table to public
6、exit sqlplus and cd $oracle_home/sqlplus/admin
7、log into sqlplus as SYS
8、run SQL> @plustrce
9、run SQL> grant plustrace to public