ALTER SESSION SET STATISTICS_LEVEL = ALL ;

SELECT *
FROM   EMP E
WHERE  TRIM(E.EMPNO)  = 9999999     
AND    E.DEPTNO       = 30;

SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(NULL, NULL, 'ALLSTATS LAST'));

-- 10046 Trace vs DBMS_XPLAN.DISPLAY_CURSOR 비교 설명 입니다. 
-- CURSOR : A-Rows, Trace : Rows
-- CURSOR : A-Time, Trace : time
-- CURSOR : Buffers, Trace : cr
-- CURSOR : Reads, Trace : pr
---------------------------------------------------------------------------------------------
| Id  | Operation         | Name | Starts | E-Rows | A-Rows |   A-Time   | Buffers | Reads  |
---------------------------------------------------------------------------------------------
|*  1 |  TABLE ACCESS FULL| EMP  |      1 |  16659 |      0 |00:00:05.62 |   33299 |  33083 |
---------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------
   1 - filter(("E"."DEPTNO"=30 AND TO_NUMBER(TRIM(TO_CHAR("E"."EMPNO")))=9999999))

Call     Count CPU Time Elapsed Time       Disk      Query    Current       Rows
------- ------ -------- ------------ ---------- ---------- ---------- ----------
Parse        1    0.000        0.003          0          0          0          0
Execute      1    0.000        0.000          0          0          0          0
Fetch        1    2.680        5.551      33082      33299          0          0
------- ------ -------- ------------ ---------- ---------- ---------- ----------
Total        3    2.680        5.554      33082      33299          0          0

Rows     Row Source Operation
-------  ---------------------------------------------------
      0  STATEMENT
      0   TABLE ACCESS FULL EMP (cr=33299 pr=33082 pw=0 time=5551325 us)