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IC79551: ADDING REDUNDANT JOINS TO FILTER ROWS OF AN OUTER JOIN OPERATOR MAY NOT OCCUR DUE TO AN ERROR IN THE ANALYSIS

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • A problem in the algorithm of the analysis may result in not
    adding redundant joins to filter rows of an outer join operator.
    This problem may occur when there are at least two outer joins.
    
    Fixing this problem will improve the performance of the outer
    joins and potentially the overall performance of the query.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 9.7 Fix Pack 6.                       *
    ****************************************************************
    

Problem conclusion

  • First fixed in DB2 Version 9.7 Fix Pack 6.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC79551

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    970

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-11-01

  • Closed date

    2012-12-10

  • Last modified date

    2012-12-10

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

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

    IC84205

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • R970 PSN

       UP



Document information

More support for: DB2 for Linux, UNIX and Windows

Software version: 9.7

Reference #: IC79551

Modified date: 10 December 2012