在sqlplus环境下oracle默认不提供sqlplus功能,按照如下步骤可以设置oracle autotrace功能,方便DBA了解sql的执行计划:
SQL> conn / as sysdbaConnected.SQL> @?/rdbms/admin/utlxplanTable created.SQL> grant all on plan_table to public;Grant succeeded.SQL> @?/sqlplus/admin/plustrceSQL> SQL> drop role plustrace;drop role plustrace *ERROR at line 1:ORA-01919: role 'PLUSTRACE' does not existSQL> create role plustrace;Role created.SQL> SQL> grant select on v_$sesstat to plustrace;Grant succeeded.SQL> grant select on v_$statname to plustrace;Grant succeeded.SQL> grant select on v_$mystat to plustrace;Grant succeeded.SQL> grant plustrace to dba with admin option;Grant succeeded.SQL> SQL> set echo offSQL> grant plustrace to public;Grant succeeded.SQL> Connected.SQL> set autotrace onSQL> SQL> select * from emp; EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO---------- ---------- --------- ---------- --------- ---------- ---------- ---------- 7369 SMITH CLERK 7902 17-DEC-80 800 20 7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30 7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30 7566 JONES MANAGER 7839 02-APR-81 2975 20 7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30 7698 BLAKE MANAGER 7839 01-MAY-81 2850 30 7782 CLARK MANAGER 7839 09-JUN-81 2450 10 7788 SCOTT ANALYST 7566 19-APR-87 3000 20 7839 KING PRESIDENT 17-NOV-81 5000 10 7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30 7876 ADAMS CLERK 7788 23-MAY-87 1100 20 EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO---------- ---------- --------- ---------- --------- ---------- ---------- ---------- 7900 JAMES CLERK 7698 03-DEC-81 950 30 7902 FORD ANALYST 7566 03-DEC-81 3000 20 7934 MILLER CLERK 7782 23-JAN-82 1300 1014 rows selected.Execution Plan----------------------------------------------------------Plan hash value: 3956160932--------------------------------------------------------------------------| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |--------------------------------------------------------------------------| 0 | SELECT STATEMENT | | 14 | 532 | 3 (0)| 00:00:01 || 1 | TABLE ACCESS FULL| EMP | 14 | 532 | 3 (0)| 00:00:01 |--------------------------------------------------------------------------Statistics---------------------------------------------------------- 72 recursive calls 1 db block gets 75 consistent gets 2 physical reads 168 redo size 1630 bytes sent via SQL*Net to client 524 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 7 sorts (memory) 0 sorts (disk) 14 rows processed