SQL> EXPLAIN PLAN FOR
2 SELECT * FROM emp e, dept d
WHERE e.deptno = d.deptno AND e.ename = 'BLAKE';
3
Explained.
SQL> @$ORACLE_HOME/rdbms/admin/utlxpls.sql
PLAN_TABLE_OUTPUT
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Plan hash value: 3625962092
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| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
----------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 58 | 4 (0)| 00:00:01 |
| 1 | NESTED LOOPS | | 1 | 58 | 4 (0)| 00:00:01 |
| 2 | NESTED LOOPS | | 1 | 58 | 4 (0)| 00:00:01 |
|* 3 | TABLE ACCESS FULL | EMP | 1 | 38 | 3 (0)| 00:00:01 |
|* 4 | INDEX UNIQUE SCAN | PK_DEPT | 1 | | 0 (0)| 00:00:01 |
| 5 | TABLE ACCESS BY INDEX ROWID| DEPT | 1 | 20 | 1 (0)| 00:00:01 |
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
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3 - filter("E"."ENAME"='BLAKE')
4 - access("E"."DEPTNO"="D"."DEPTNO")
Note
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- this is an adaptive plan
22 rows selected.
SQL>
