Query On XXX_TAB_PARTITIONS Does Full Table Scan On TABPART$
(Doc ID 1134660.1)
Last updated on FEBRUARY 20, 2019
Applies to:
Oracle Database - Enterprise Edition - Version 10.2.0.4 to 11.2.0.2 [Release 10.2 to 11.2]Information in this document applies to any platform.
Symptoms
Any query on the views XXX_TAB_PARTITIONS and XXX_IND_PARTITIONS does a full table scan
and full sort on the respective partitioning base tables tabpart$ and tabind$,
as it can be seen at the following part of a typical execution plan:
-----------------------------------------------------------------------
| Id | Operation |Name |Rows |Bytes |TempSpc|Cost
-----------------------------------------------------------------------
|* 8|HASH JOIN | | 18| 7686 | | 252
| 9| TABLE ACCESS BY INDEX ROWID|OBJ$ | 1| 28 | | 4
|* 10| INDEX RANGE SCAN |I_OBJ2 | 1| | | 3
| 11| VIEW |TABPARTV$|13266| 5169K| | 247
| 12| WINDOW SORT | |13266| 829K| 2968K| 247
| 13| TABLE ACCESS FULL |TABPART$ |13266| 829K| | 40
| Id | Operation |Name |Rows |Bytes |TempSpc|Cost
-----------------------------------------------------------------------
|* 8|HASH JOIN | | 18| 7686 | | 252
| 9| TABLE ACCESS BY INDEX ROWID|OBJ$ | 1| 28 | | 4
|* 10| INDEX RANGE SCAN |I_OBJ2 | 1| | | 3
| 11| VIEW |TABPARTV$|13266| 5169K| | 247
| 12| WINDOW SORT | |13266| 829K| 2968K| 247
| 13| TABLE ACCESS FULL |TABPART$ |13266| 829K| | 40
In this way, using a lot of partitions, then these views are extremely slow.
Disclaimer:
In the images and/or the document content above, the user information and data used represents fictitious data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.
In the images and/or the document content above, the user information and data used represents fictitious data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |