SQL> explain plan for select * from test where flag=:a;

Explained.

SQL> select * from table(dbms_xplan.display);

PLAN_TABLE_OUTPUT

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| Id  | Operation            |  Name       | Rows  | Bytes | Cost  |

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|   0 | SELECT STATEMENT     |             |  3101 |  9303 |     3 |

|*  1 |  TABLE ACCESS FULL   | TEST       |  3101 |  9303 |     3 |

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Predicate Information (identified by operation id):

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PLAN_TABLE_OUTPUT

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   1 - filter("TEST"."FLAG"=:Z)

Note: cpu costing is off

14 rows selected.

Execution Plan

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   0      SELECT STATEMENT Optimizer=CHOOSE

   1    0   COLLECTION ITERATOR (PICKLER FETCH) OF 'DISPLAY'

explain plan 的用法