|
Problem IC79409
|
Status: Closed |
OPTIMIZER CARDINALITY ESTIMATION ERRORS FOR INDEX SCAN OPERATIONS |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - 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 the APAR text *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 9.7 FP6 *
**************************************************************** |
| Local Fix: |
None available. |
| available fix packs: |
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
A fix was provided in DB2 9.7 FP6 |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC84346
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 24.10.2011
05.06.2012
05.06.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.6
|
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