Fixes are available
APAR status
Closed as program error.
Error description
Suboptimal performance can be observe when running a query with the following characteristics: 1. the query runs on columnized tables 2. the query contains an equality predicate and an inequality predicate 3. the inequality predicate can be rewritten to containing only constants and host variables based on the equality predicate An example query: select 1 from col_table where c1<>9 and c1=:HV
Local fix
manually rewrite the inequality predicate. The example query can be rewritten to: select 1 from col_table, (select * from values(0) where :HV<>9) where c1=:HV
Problem summary
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 11.1 Mod 4 Fixpack 5 or higher * ****************************************************************
Problem conclusion
First fixed in Db2 11.1 Mod 4 Fixpack 5
Temporary fix
Comments
APAR Information
APAR number
IT27081
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
2018-11-26
Closed date
2020-01-16
Last modified date
2020-01-16
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