A fix is available
APAR status
Closed as program error.
Error description
Query containing 'col1 IS NOT DISTINCT FROM col2' can return false instead of true if col1 and col2 are both NULL and the query was offloaded to an accelerator.
Local fix
n/a
Problem summary
**************************************************************** * USERS AFFECTED: All users of DB2 10 and DB2 11 for z/OS who * * use query acceleration. * **************************************************************** * PROBLEM DESCRIPTION: Incorrect output might occur when a * * query that contains IS NOT DISTINCT * * FROM predicate is offloaded to an * * accelerator. * * * **************************************************************** * RECOMMENDATION: * **************************************************************** When a query containing the predicate IS DISTINCT FROM or IS NOT DISTINCT FROM is offloaded to an accelerator, incorrect output might occur. For example: SELECT COUNT(*) FROM T1 A LEFT OUTER JOIN T2 B ON A.COL01 = B.COL01 WHERE A.COL01 IS NOT DISTINCT FROM B.COL01 FOR FETCH ONLY; DB2 fixes the incorrect output of the query conversion. Additional Keywords: IDAAV4R1/K SQLINCORROUT SQLINCORR INCORROUT DB2INCORR/K
Problem conclusion
DB2 fixes the possible incorrect output for a query offloaded to an accelerator and contains IS DISTINCT FROM or IS NOT DISTINCT FROM predicates.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI47361
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2015-08-21
Closed date
2015-09-10
Last modified date
2015-10-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI31023 UI31024
Modules/Macros
DSNXONZC
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
Fix is available
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Document Information
Modified date:
02 October 2015