IBM Support

IT33004: WRONG RESULT, WHEN OPTIMIZATION LEVEL IS LESS THAN 5 AND NULL EQUALS NULL PREDICATE

Fixes are available

Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Db2 query may generate wrong result when optimization level is
less than 5 and there is a null
equals null predicate of form c1 = c2 OR c1 is null AND c2 is
null

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* Rowstore                                                     *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Db2 11.1.4.6 or higher                            *
****************************************************************

    



Problem conclusion


    

  • Upgrade to Db2 11.1.4.6 or higher

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT33004
    • 

  • Reported component name
    DB2 FOR LUW
    • 

  • Reported component ID
    DB2FORLUW
    • 

  • Reported release
    B10
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    YesHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-05-28
    • 

  • Closed date
    2021-03-19
    • 

  • Last modified date
    2021-03-29
    • 





    

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

    
IT32992
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    DB2 FOR LUW
    • 

  • Fixed component ID
    DB2FORLUW
    • 



Applicable component levels


    

  • RB10  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            04 May 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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