DB2 - Problem description
Problem IT33527 | Status: Closed |
POOR PERFORMANCE OF DB2 QUERY HAVING IN SUBQUERY PREDICATE | |
product: | |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 | |
Problem description: | |
Db2 query may experience poor performance when the following conditions are met: -There is IN subquery predicate -The In subquery predicate references column(s) from UNION -The source column(s) of the referenced column(s) in IN subquery is from Row Preserving Side of embeded Outer Joins. | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * **************************************************************** | |
Local Fix: | |
Rewrite the query to pushdown the IN subquery predicate on the source table. | |
Solution | |
Workaround | |
not known / see Local fix | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 13.07.2020 02.10.2020 02.10.2020 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |