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IT38955: WRONG RESULTS FROM SELECT COUNT QUERY ON "ORGANIZE BY COLUMN" TABLE

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APAR status

  • Closed as program error.

Error description

  • Inconsistent results are possible when SELECT COUNT query is
    executed on "ORGANIZE BY COLUMN" table.
    The issue is happening due to internal dictionary and encoding
    optimizations.
    
    Query has to have an equality predicate.
    Example:
    select count(*) from t1 where myint=563422
    
    The issue does not happen if the predicate is changed to use
    "like" or an arithmetic operation:
    
    select count(*) from t1 where myint like '563422%'
    select count(*) from t1 where (myint*2) = 1126844
    

Local fix

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

    IT38955

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-11-03

  • Closed date

    2022-04-17

  • Last modified date

    2022-04-20

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

    IT37674

  • 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

  • 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