|
Problem IT20053
|
Status: Closed |
DB2 MIGHT PRODUCE SUBOPTIMAL PLAN FOR DEEPLY NESTED NOT EXISTENTIAL SUBQUERIES |
| 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 *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 11.1 Mod 2 Fix Pack 2 or higher *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 11.1 Mod 2 Fix Pack 2 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod2 Fix Pack2 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod2 Fix Pack2 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 3 Fix Pack 3 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix002 for Linux, UNIX, and Windows
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| Solution |
First fixed in DB2 11.1 Mod 2 Fix Pack 2 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 04.04.2017
23.06.2017
23.06.2017 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
