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Problem IC80758
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Status: Closed |
OPTIMIZER MIGHT NOT CONSIDER A TABLESCAN OF A RANGE PARTITIONED TABLE ON THE INNER OF A NESTED LOOP JOIN |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
The query plan optimizer might not consider a table scan of a
range partitioned table on the inner of a nested loop join even
though it is not a full table scan when the pushed down join
predicates could restrict the number of partitions that are
being scanned. You might encounter this problem at optimization
class 7 and lower. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* OPTIMIZER MIGHT NOT CONSIDER A TABLESCAN OF A RANGE *
* PARTITIONED TABLE ON THE INNER OF A NESTED LOOP JOIN *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 Version Fix Pack 6. *
**************************************************************** |
| Local Fix: |
Compiling the query under optimization class 9 will enable the
optimizer to consider the table scan option. |
| 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 |
First fixed in DB2 Version Fix Pack 6. |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC84324
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 10.01.2012
05.06.2012
05.06.2012 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.6
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