APAR status
Closed as program error.
Error description
Db2 query may show poor performance since antijoin is not formed due to presence of side effect in the query, although the side effect is not dependent on the query block that can be considered for antijoin.
Local fix
Add select * on the subquery having not exists and also add order by to the end of that added select. In column store along with that, use registry setting DB2COMPOPT=NO_OBELIM
Problem summary
**************************************************************** * USERS AFFECTED: * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * ****************************************************************
Problem conclusion
Temporary fix
Comments
APAR Information
APAR number
IT31146
Reported component name
DB2 FOR LUW
Reported component ID
DB2FORLUW
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-12-03
Closed date
2021-03-15
Last modified date
2021-03-15
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
DB2 FOR LUW
Fixed component ID
DB2FORLUW
Applicable component levels
[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1"}]
Document Information
Modified date:
16 March 2021