@$ORACLE_HOME/rdbms/admin/utlxplan.sql
@$ORACLE_HOME/sqlplus/admin/plustrce.sql
grant plustrace to AAAA;
alter user ismp default role all;  


select privilege from dba_sys_privs where grantee='AAAA'  
union  
select privilege from dba_sys_privs where grantee in (select granted_role from dba_role_privs where grantee='AAAA' );

select * from dba_role_privs where grantee='AAAA';

SQL> conn AAAA/junshi
Connected.
SQL> set autotrace on
SQL> 

參考：

SET AUTOTRACE fails with SP2-0618 and SP2-0611 (文件 ID 1159115.1)