cannot fetch plan for SQL_ID: 5qgz1p0cut7mx, CHILD_NUMBER: 0

SQL> set serveroutput off --一定要关

SQL> select * from table(dbms_xplan.display_cursor(null,null,'ADVANCED'));

PLAN_TABLE_OUTPUT

------------------------------------------------------------------------------------------------------------------------------------------------------

SQL_ID 5qgz1p0cut7mx, child number 0

BEGIN DBMS_OUTPUT.DISABLE; END;

NOTE: cannot fetch plan for SQL_ID: 5qgz1p0cut7mx, CHILD_NUMBER: 0

Please verify value of SQL_ID and CHILD_NUMBER;

It could also be that the plan is no longer in cursor cache (check v$sql_plan)

已选择8行。

SQL> select * from table(dbms_xplan.display_cursor(null,null,'allstats last'));

PLAN_TABLE_OUTPUT

------------------------------------------------------------------------------------------------------------------------------------------------------

SQL_ID 7xdg8akqchn1t, child number 1

-------------------------------------

select * from table(dbms_xplan.display_cursor(null,null,'ADVANCED'))

Plan hash value: 3713220770

---------------------------------------------------------------------

| Id | Operation | Name | E-Rows |

---------------------------------------------------------------------

| 0 | SELECT STATEMENT | | |

| 1 | COLLECTION ITERATOR PICKLER FETCH| DISPLAY_CURSOR | 16 |

---------------------------------------------------------------------

Note

-----

- cardinality feedback used for this statement

- Warning: basic plan statistics not available. These are only collected when:

* hint 'gather_plan_statistics' is used for the statement or

* parameter 'statistics_level' is set to 'ALL', at session or system level

已选择20行。

SQL> select count(*) from t1 where object_id between :x and :y;

COUNT(*)

----------

145152

SQL> select * from table(dbms_xplan.display_cursor(null,null,'ADVANCED'));

PLAN_TABLE_OUTPUT

------------------------------------------------------------------------------------------------------------------------------------------------------

SQL_ID 1ynfbm8a0p98u, child number 0

-------------------------------------

select count(*) from t1 where object_id between :x and :y

Plan hash value: 1410530761

---------------------------------------------------------------------------------

| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |

---------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | | | | 91 (100)| |

| 1 | SORT AGGREGATE | | 1 | 5 | | |

|* 2 | FILTER | | | | | |

|* 3 | INDEX FAST FULL SCAN| IDX_T1 | 145K| 708K| 91 (3)| 00:00:02 |

---------------------------------------------------------------------------------

Query Block Name / Object Alias (identified by operation id):

-------------------------------------------------------------

1 - SEL$1

3 - SEL$1 / T1@SEL$1

Outline Data

-------------

/*+

BEGIN_OUTLINE_DATA

IGNORE_OPTIM_EMBEDDED_HINTS

OPTIMIZER_FEATURES_ENABLE('11.2.0.1')

DB_VERSION('11.2.0.1')

ALL_ROWS

OUTLINE_LEAF(@"SEL$1")

INDEX_FFS(@"SEL$1" "T1"@"SEL$1" ("T1"."OBJECT_ID"))

END_OUTLINE_DATA

*/

Peeked Binds (identified by position):

--------------------------------------

1 - :X (NUMBER): 0

2 - :Y (NUMBER): 100000

Predicate Information (identified by operation id):

---------------------------------------------------

2 - filter(:X<=:Y)

3 - filter(("OBJECT_ID">=:X AND "OBJECT_ID"<=:Y))

Column Projection Information (identified by operation id):

-----------------------------------------------------------

1 - (#keys=0) COUNT(*)[22]

已选择52行。