Fixes are available
APAR status
Closed as program error.
Error description
Federated query having scalar correlated subquery predicate could return incorrect result. Here are some conditions which could cause this - 1. It is a federated query. 2. Query predicate involves scalar correlated subquery whose equivalent join columns contain unique key. A sample predicate is: "val_or_col_1 >= (select val_or_col_2 from subQTab where subQTab.c1 = outerTab.colX and subQTab.c2 = val_or_col_3)" The subquery equivalent join columns are (c1, c2). It requires primary key or unique index created on one or two out of (c1, c2). 3. Regarding the parent SELECT operator of the scalar correlated subquery, the number of its join tables should be between 2 and 9 inclusive, and each join table should have equivalent join predicate.
Local fix
If DB2COMPOPT registry is currently unset, issue "db2set DB2COMPOPT=0,16". Otherwise, consult DB2 service for further assistance.
Problem summary
**************************************************************** * USERS AFFECTED: * * Only federated queries along with the two additional * * conditions which have to met (see "ERROR DESCRIPTION" for * * details). * **************************************************************** * PROBLEM DESCRIPTION: * * Without this APAR, customer is exposed to the issue as * * described in the "ERROR DESCRIPTION" section. * **************************************************************** * RECOMMENDATION: * * Upgrade to DB2 Version 9.5, Fixpack 6. * ****************************************************************
Problem conclusion
First fixed in DB2 Version 9.5, Fixpack 6.
Temporary fix
If DB2COMPOPT registry is currently unset, issue "db2set DB2COMPOPT=0,16". Otherwise, consult DB2 service for further assistance.
Comments
APAR Information
APAR number
IZ72129
Reported component name
DB2 UDB ESE SOL
Reported component ID
5765F4102
Reported release
950
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-03-04
Closed date
2010-06-30
Last modified date
2011-01-21
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 UDB ESE SOL
Fixed component ID
5765F4102
Applicable component levels
R950 PSN
UP
[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"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":"950"}]
Document Information
Modified date:
06 October 2021