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Problem IC84346
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Status: Closed |
OPTIMIZER CARDINALITY ESTIMATION ERRORS FOR INDEX SCAN OPERATIONS |
| product: |
DB2 FOR LUW / DB2FORLUW / A10 - DB2 |
| Problem description: |
The cardinality estimate for index scan operations requiring a
FETCH (IXSCAN, IOA and IXA) might be inaccurate. The situations
when this inaccuracy can occur will vary depending on many
factors. It is more likely to occur if the index's table has
many other indexes, column group statistics, statistical views
or the table is range partitioned. The cardinality of the FETCH
operator corresponding to the index scan operation might also be
inaccurate. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 10.1 FP1 or subsequent fix pack *
**************************************************************** |
| Local Fix: |
None available. |
| available fix packs: |
DB2 Version 10.1 Fix Pack 1 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows
|
| Solution |
Problem First Fixed in DB2 Version 10.1 Fix Pack 1 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 13.06.2012
13.11.2012
13.11.2012 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.1.0.1
|
 |
| 10.5.0.1
|
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