IBM Support

IT00261: IS NULL PREDICATE IS NOT PUSHED DOWN TO THE TIMESERIES VTI LAYER CAUSING LONGER RUNTIMES FOR A QUERY

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APAR status

  • Closed as program error.

Error description

  • .... where vti.status <> 'SC'
    is fast
    
    ....where ( vti.status IS NULL OR vti.status <> 'SC')
    is slow
    
    Queryplan:
    
    fast:
      2) vti: VTI SCAN
            VTI Filters: informix.equal(hedwigb.vti.status,'SC' )
    
    slow:
      2) vti: VTI SCAN
            Filters: ((vti.status != 'SC' OR vti.status IS NULL ))
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * is null predicate with vti                                   *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Update to IDS-12.10.xC5                                      *
    ****************************************************************
    

Problem conclusion

  • Problem Fixed In IDS-12.10.xC5
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT00261

  • Reported component name

    INFORMIX SERVER

  • Reported component ID

    5725A3900

  • Reported release

    C10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-03-12

  • Closed date

    2015-10-16

  • Last modified date

    2015-10-16

  • 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

    INFORMIX SERVER

  • Fixed component ID

    5725A3900

Applicable component levels

  • RC10 PSN

       UP



Document information

More support for: Informix Servers

Software version: C10

Reference #: IT00261

Modified date: 2015-10-16