A fix is available
APAR status
Closed as program error.
Error description
Select produced incorrect output if an index page was released and retraverse occurred.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All DB2 11 for z/OS users doing reverse * * index scans on partitioned indexes. * **************************************************************** * PROBLEM DESCRIPTION: Incorrout can occur using aggregate * * function and group by via index only * * access with reverse index scan * **************************************************************** * RECOMMENDATION: * **************************************************************** SQL statement has aggregate function and group by. The table is partitioned and DB2 is using index only access path. During the retrieval of data via the index only access, incorrect output is returned when different index partitions are scanned. When scanning in the reverse direction within a partitioned index and at the same time skipping non-distinct values, valid index keys could be missed when a previous index partition is accessed. Additional Keywords: DB2INCORR/K INCORROUT SQLINCORR SQLINCORROUT SQLGROUPBY
Problem conclusion
Code within DB2 has been modified to correctly begin scanning within the previous partition for qualifying keys, when index key skipping is active and reverse index scan is used.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI70959
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-10-19
Closed date
2016-11-09
Last modified date
2016-12-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI42427
Modules/Macros
DSNKFPRV
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RB10 PSY UI42427
UP16/11/24 P F611
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
01 December 2016