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Informix - Problem description

Problem IT00261 Status: Closed

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

product:
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10
Problem 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 ))
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* is null predicate with vti                                   * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Update to IDS-12.10.xC5                                      * 
****************************************************************
Local Fix:


Solution


Problem Fixed In IDS-12.10.xC5


Workaround


not known / see Local fix


Timestamps


Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

12.03.2014
16.10.2015
16.10.2015


Problem solved at the following versions (IBM BugInfos)




Problem solved according to the fixlist(s) of the following version(s)


12.10.xC4.W1

FixList



12.10.xC5

FixList



12.10.xC5.W1

FixList