A fix is available
APAR status
Closed as program error.
Error description
DB2 can return wrong query result when all of the following conditions are satisfied 1. DPF (Data Partitioning Feature) environment. 2. The query has a outer join, and the outer join has a predicate of the form COLUMN1=COLUMN2, where both columns are from the outer table. 3. Either DB2COMPOPT=OJLOCALPRDPLANNING is set, or the NULL-producing side of the outer join is a CSE (Common SubExpression), UNION, GROUP-BY, or another outer join. 4. The query has a key requirement or order requirement on one of the columns in the COLUMN1=COLUMN2 predicate. For example: The following query can possibly produce a wrong result in DPF environment, because the query has an outer join predicate of TT.T1_C1 = TT.T1_C2, the NULL-producing side of the outer join is another outer join, and the query requires "DISTINCT TT.T1_C2" SELECT DISTINCT TT.T1_C2 FROM T1 TT LEFT OUTER JOIN (SELECT T2.T2_C4 FROM T2 FULL OUTER JOIN T1 ON T1.T1_C1 = T2.T2_C2) TT2 on TT.T1_C1 = TT.T1_C2 The following query can possibly produce a wrong result in DPF environment and when DB2COMPOPT=OJLOCALPRDPLANNING is set, because the query has an outer join predicate of T1.T1_C1=T1.T1_C2, and the query requires "ORDER BY TT.T1_C2" SELECT * FROM T2 TT1, (SELECT * FROM T1 LEFT JOIN T2 on T1.T1_C1=T1.T1_C2 ) TT WHERE TT1.T2_C4 = TT.T1_C1 ORDER BY TT.T1_C2
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to DB2 10.1 Fix Pack 6 * ****************************************************************
Problem conclusion
First fixed in DB2 10.1 Fix Pack 6
Temporary fix
Comments
APAR Information
APAR number
IT17506
Reported component name
DB2 FOR LUW
Reported component ID
DB2FORLUW
Reported release
A10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-10-14
Closed date
2017-03-02
Last modified date
2017-03-02
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
RA10 PSN UP
FIX
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Document Information
Modified date:
02 March 2017