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Problem IT21905
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Status: Closed |
DB2 MIGHT PRODUCE SUBOPTIMAL PLAN FOR DEEPLY NESTED NOT EXISTENTIAL SUBQUERIES
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| product: |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 |
| Problem description: |
Under rare scenarios, DB2 might produce a suboptimal plan if the
following conditions are true
1) The query contains 3 or more levels of nested sub-queries of
form NOT IN/ NOT EXISTS
2) The sub-queries have one or more correlated predicates |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* all platforms *
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* PROBLEM DESCRIPTION: *
* See Error Description *
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* RECOMMENDATION: *
* upgrade to db2_v111m1fp2 *
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| Local Fix: |
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| Solution |
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| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : IT19868
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 09.08.2017
09.10.2017
09.10.2017 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
