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IT34998: DB2 CAN CRASH DURING COMPILATION IF THE SAME EXPRESSION IS USED IN BOTH AN EQUALITY JOIN PREDICATE AND AN EXPRESSION-BASED INDEX

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APAR status

  • Closed as program error.

Error description

  • Program can crash with memory corruption.
    The defect might be encountered when processing an
    SQL statement with an expression that is used both
    in a join predicate as well as an expression-based index.
    
    the stack might be similar to one of the following:
    
    Example 1:
    sqlno_assign_optqnc
    sqlno_assign_end_qgm
    sqlno_scan_qgm
    sqlno_prep_phase
    sqlno_exe
    sqlnn_cmpl
    
    Example 2:
    diagnoseMemoryCorruptionAndCrash
    IPRA.$sqloDiagnoseFreeBlockFailure
    sqlofmblkEx
    sqlno_close_pool
    sqlno_free_pools
    sqlnn_cmpl
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * all                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * upgrade to DB2 Version 11.1 Fix Pack m4fp6                   *
    ****************************************************************
    

Problem conclusion

  • version affected : DB2 Version 11.1 Fix Pack m4fp5 and earlier
    version
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT34998

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B50

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2020-11-20

  • Closed date

    2021-02-18

  • Last modified date

    2021-02-18

  • 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 PSY

       UP

  • RB50 PSY

       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":"11.5","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
04 May 2022