A fix is available
APAR status
Closed as program error.
Error description
Db2 query may perform poorly when the following conditions are met: - The query has an outer join - The null producing side is select on base table. - There is local predicate on the table in null producing side. - The row preserving side used in join predicate is small compared to the null producing side.
Local fix
DB2COMPOPT=NOOJSJ registry can be used as workaround. This can have some negative impact on queries in which case it can also be applied only for the specific queries with optimization guideline: <query> /*<OPTGUIDELINES> <REGISTRY> <OPTION NAME='DB2COMPOPT' VALUE='NOOJSJ'/> </REGISTRY> </OPTGUIDELINES>*/
Problem summary
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * ****************************************************************
Problem conclusion
Upgrade to 11.1.4.7
Temporary fix
Comments
APAR Information
APAR number
IT31211
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
2019-12-09
Closed date
2022-04-17
Last modified date
2022-04-17
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
RB10 PSN
UP
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
Document Information
Modified date:
04 May 2022