Fixes are available
APAR status
Closed as program error.
Error description
query with outer join together with "dbpartitionnum() =" local predicate no longer gets the desired plan with the base access running on just one database partition. It can cause the worse performance comparing with the previous release. Once the customer has installed the ptf with the fix, they must also set the following registry variable to revert to the previous behavior: db2set DB2_EXTENDED_OPTIMIZATION="SEP_DBPTNUM ON" (This registry variable can be set dynamically). Note that this setting can be combined with existing settings. For example, if the current setting is DB2_EXTENDED_OPTIMIZATION=ON you can add the additional setting to the end, separated by a comma (no spaces) as follows: db2set DB2_EXTENDED_OPTIMIZATION="ON,SEP_DBPTNUM ON"
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * Db2 EEE configurations * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 Version 11.1 Fix Pack m4fp6. * * Then set registry variable as described in the error * * description. * ****************************************************************
Problem conclusion
Fixed in Db2 Version 11.1 Fix Pack m4fp6
Temporary fix
Comments
APAR Information
APAR number
IT31996
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
2020-02-26
Closed date
2021-03-19
Last modified date
2021-03-19
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