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PK99847: INCORRECT OUT WHEN IT'S INDEX ONLY ACCESS AND THE INDEX IS AN INDEX ON EXPRESSION

A fix is available

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APAR status

  • Closed as program error.

Error description

  • incorrect out when it's index only access and the index is index
    on expression, and there is sargable predicate which is neither
    matching nor screening.
    .
    Additional keyword: DB2INCORR/K
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 V9 users when running query with     *
    *                 index on expression                          *
    ****************************************************************
    * PROBLEM DESCRIPTION: (1) Incorrect output may be occurred    *
    *                      when index on expression is chosen and  *
    *                      all the columns that referenced in the  *
    *                      query are all from the index key        *
    *                      columns.                                *
    *                      (2) Abend 04E-00E700058 at DSNXO1S:     *
    *                      P008 may be occurred when index on      *
    *                      expression is picked and multiple       *
    *                      index ORing access is chosen.           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    (1) Incorrect output may be occurred when index on expression is
    chosen and all the columns that referenced in the query are all
    from the index key columns.
    
    The following query is an example of this case.
    
      CREATE INDEX I1 ON T1(LOWER(C1),C2,C3)
    
      SELECT LOWER(C1) FROM T1
      WHERE (C3=1 AND C2<>0 AND(LOWER (C1) LIKE '103%' ));
    
    (2) Abend 04E-00E700058 at DSNXO1S: P008 may be occurred when
    index on expression is picked and multiple index ORing access
    is chosen.
    
    The following query is an example of this case.
    
      CREATE INDEX I1 ON T1(LOWER(C1),C2)
    
      CREATE INDEX I2 ON T1(C1,C2)
    
      SELECT LOWER(C1), C2 FROM T1
      WHERE (C2=1 AND (LOWER (C1) LIKE '103%' )) OR
            (C2=1 AND C1='ABCD')
    

Problem conclusion

  • The bindtime code in DB2 is modified to correct the failing
    condition.
    
    Additional keyword: SQLINDEXONEXP INCORROUT ABEND04E
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PK99847

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-10-28

  • Closed date

    2009-12-09

  • Last modified date

    2011-05-10

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

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

    UK52749

Modules/Macros

  • DSNXOBM  DSNXOGA  DSNXOMIS DSNXO1S
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • R910 PSY UK52749

       UP10/01/21 P F001

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
10 May 2011