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IC79409: OPTIMIZER CARDINALITY ESTIMATION ERRORS FOR INDEX SCAN OPERATIONS

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The cardinality estimate for index scan operations requiring a
    FETCH (IXSCAN, IOA and IXA) might be inaccurate. The situations
    when this inaccuracy can occur will vary depending on many
    factors. It is more likely to occur if the index's table has
    many other indexes, column group statistics, statistical views
    or the table is range partitioned. The cardinality of the FETCH
    operator corresponding to the index scan operation might also be
    inaccurate.
    

Local fix

  • None available.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See the APAR text                                            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 9.7 FP6                                       *
    ****************************************************************
    

Problem conclusion

  • A fix was provided in DB2 9.7 FP6
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC79409

  • 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

    2011-10-24

  • Closed date

    2012-06-05

  • Last modified date

    2012-06-05

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

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

    IC84346

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • R970 PSN

       UP

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Document Information

Modified date:
05 June 2012