sql> SET AUTOTRACE ON
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report
sql> conn system/oracle
Connected.
sql> grant PLUSTRACE to adela;
grant PLUSTRACE to adela
*
ERROR at line 1:
ORA-01919: role 'PLUSTRACE' does not exist
解决：
drop role c##plustrace; create role c##plustrace; grant select on v_$sesstat to c##plustrace; grant select on v_$statname to c##plustrace; grant select on v_$mystat to c##plustrace; grant c##plustrace to c##adela with admin option; conn c##adela/oracle set autotrace on
查看下效果
sql> set line 100 sql> select cname from c where cno in (select cno from sc where sno in (select sno from s where sname='adela')); CNAME -------------------- OS C++ Java DB Execution Plan ---------------------------------------------------------- Plan hash value: 2310661688 -------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%cpu)| Time | -------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | 22 | 5 (0)| 00:00:01 | | 1 | nesTED LOOPS | | | | | | | 2 | nesTED LOOPS | | 1 | 22 | 5 (0)| 00:00:01 | | 3 | VIEW | VW_NSO_1 | 2 | 10 | 4 (0)| 00:00:01 | | 4 | HASH UNIQUE | | 1 | 48 | | | | 5 | nesTED LOOPS | | 2 | 48 | 4 (0)| 00:00:01 | |* 6 | TABLE ACCESS FULL | S | 1 | 13 | 3 (0)| 00:00:01 | |* 7 | INDEX RANGE SCAN | SC_PK | 2 | 22 | 1 (0)| 00:00:01 | |* 8 | INDEX UNIQUE SCAN | SYS_C009862 | 1 | | 0 (0)| 00:00:01 | | 9 | TABLE ACCESS BY INDEX ROWID| C | 1 | 17 | 1 (0)| 00:00:01 | -------------------------------------------------------------------------------------------- Predicate information (identified by operation id): --------------------------------------------------- 6 - filter("SNAME"='adela') 7 - access("SNO"="SNO") 8 - access("CNO"="CNO") Note ----- - dynamic statistics used: dynamic sampling (level=2) - this is an adaptive plan Statistics ---------------------------------------------------------- 0 recursive calls 0 db block gets 16 consistent gets 0 physical reads 0 redo size 612 bytes sent via sql*Net to client 543 bytes received via sql*Net from client 2 sql*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 4 rows processed
ok！
