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IT29574: WRONG RESULT MIGHT OUTPUT FROM QUERIES WITH INNER JOINS AND CORRELATED EXISTS SUB-QUERIES CONTAINING OUTER JOINS

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APAR status

  • Closed as program error.

Error description

  • Users might observe wrong results from a query with the
    following characteristics:
    1. the query contains EXISTS sub-query correlated to a base
    table referenced in a select hosting the EXISTS predicate and
    let's call the correlated source column in this base table
    col_corr_source
    2. this base table joins with another sub-query on
    col_corr_source
    2. the EXISTS sub-query contains at least one outer join
    3. the correlated column in the EXISTS sub-query is on the row
    preserving side of the outer join
    
    When the wrong result occurs, the query outputs more rows than
    the correct result.
    

Local fix

  • Work-around:
    None
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * None                                                         *
    ****************************************************************
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT29574

  • 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

    2019-06-28

  • Closed date

    2021-01-25

  • Last modified date

    2021-03-29

  • 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

  • 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:
03 May 2022