SQL>@?/sqlplus/admin/plustrce.sql

SYS@EZreal hey~J->drop role plustrace;

Role dropped.

SYS@EZreal hey~J->create role plustrace;

Role created.

SYS@EZreal hey~J->
SYS@EZreal hey~J->grant select on v_$sesstat to plustrace;

Grant succeeded.

SYS@EZreal hey~J->grant select on v_$statname to plustrace;

Grant succeeded.

SYS@EZreal hey~J->grant select on v_$mystat to plustrace;

Grant succeeded.

SYS@EZreal hey~J->grant plustrace to dba with admin option;

Grant succeeded.

SYS@EZreal hey~J->grant plustrace to hr;

Grant succeeded.

SQL>conn hr/hr

HR@PROD>set autotrace traceonly;
HR@PROD>select count(*) from t3 where id=1;

Execution Plan
----------------------------------------------------------
Plan hash value: 463314188

---------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 13 | 7 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 13 | | |
|* 2 | TABLE ACCESS FULL| T3 | 1 | 13 | 7 (0)| 00:00:01 |
---------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

2 - filter("ID"=1)

Note
-----
- dynamic sampling used for this statement (level=2)
- SQL plan baseline "SQL_PLAN_ghfucv736fsc114fae16c" used for this statement

Statistics
----------------------------------------------------------
53 recursive calls
0 db block gets
82 consistent gets
0 physical reads
0 redo size
526 bytes sent via SQL*Net to client
524 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
5 sorts (memory)
0 sorts (disk)
1 rows processed

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