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IT38232: INCORRECT RESULTS MIGHT BE RETURN FOR COUNT/COUNT_BIG OVER() SCALAR AGGREGATE FUNCTION UNDER AN OUTER JOIN

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APAR status

  • Closed as program error.

Error description

  • Query characteristics:
    
    + Query with outer join
    + Join column on the tuple producing side is not null
    + COUNT or COUNT_BIG OVER (PARTITION BY ) aggregate function on
    the null-producing side of the join
    + Partitioning is a subset of the join column
    

Local fix

  • Apply the following optimization guideline to the query:
    
    
    /*<OPTGUIDELINES>
    <REGISTRY> <OPTION NAME='DB2_EXTENDED_OPTIMIZATION'
    VALUE='GBPU_EXT OFF'/></REGISTRY>
    </OPTGUIDELINES>*/
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * all                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to 11.1.4.7                                          *
    ****************************************************************
    

Problem conclusion

  • Upgrade to 11.1.4.7
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT38232

  • 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

    2021-09-01

  • Closed date

    2022-04-17

  • Last modified date

    2022-04-17

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    IT39807

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