DB2 - Problem description
Problem IT21905 | 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 platforms * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * upgrade to db2_v111m1fp2 * **************************************************************** | |
Local Fix: | |
Solution | |
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) |