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IZ13205: QUERY PERFORMANCE PROBLEM IF THERE ARE 200 ELEMENTS IN LIST

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • INLIST to JOIN transform does not occur if there are exactly 200
    elements in the IN LIST , leading to a performance degradation
    for the query.
    

Local fix

  • Use optimizataion level 7
    

Problem summary

  • Users Affected:
    Db2 Users running a query with exactly 200 elements in an IN
    LIST.
    Problem Description:
    INLIST to JOIN transform does not occur if there are exactly 200
    elements in the IN LIST , leading to a performance degradation
    for the query.
    Problem Summary:
    Performance problem with IN LIST using 200 elements
    

Problem conclusion

  • Problem first fixed in DB2 V9.1 FP5
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ13205

  • Reported component name

    DB2 UDB ESE HP-

  • Reported component ID

    5765F4103

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2008-01-17

  • Closed date

    2008-07-15

  • Last modified date

    2008-07-15

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

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

    IZ26552

Fix information

  • Fixed component name

    DB2 UDB ESE HP-

  • Fixed component ID

    5765F4103

Applicable component levels

  • R910 PSY

       UP

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Document Information

Modified date:
15 July 2008