DB2 - Problem description
Problem IT18870 | Status: Closed |
POOR PERFORMANCE IN QUERY HAVING IN SUBQUERY AND JOINS | |
product: | |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 | |
Problem description: | |
DB2 might depict performance degradation when the following conditions are met: - The query has IN subquery - There are multiple INNER and OUTER joins - The IN predicate is on a table participating in the JOINS - The IN subquery is on a base table | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * All * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * See Error Description * **************************************************************** | |
Local Fix: | |
Use optimization level 1 using 1. set current query optimization level 1 or 2. using optguidelines: query /* */ ; | |
Solution | |
Workaround | |
not known / see Local fix | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 17.01.2017 31.08.2018 31.08.2018 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |