IBM Support

LI74103: ENHANCE OUTER JOIN EXEC ORDER/ELIMINATE REDUNDANT OUTER JOIN

Fixes are available

DB2 Version 9.5 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 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

  • This is an enhancement on left and right outer join. More
selective outer join will be identified and executed earlier.
Also improve the capability to find more unnecessary outer join
and then remove it.

Local fix

  • N/A

Problem summary

  • ****************************************************************
* USERS AFFECTED:                                              *
* N/A                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* This is an enhancement on left and right outer join.         *
* Moreselective outer join will be identified and              *
* executedearlier. Also improve the capability to find         *
* moreunnecessary outer join and then remove it.               *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to DB2 Version 9.5 Fix Pack 5.                       *
****************************************************************

Problem conclusion

  • First fixed in DB2 Version 9.5 Fix Pack 5.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    LI74103
    • 

  • Reported component name
    DB2 UDE ESE LIN
    • 

  • Reported component ID
    5765F4104
    • 

  • Reported release
    950
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2008-12-31
    • 

  • Closed date
    2010-03-12
    • 

  • Last modified date
    2010-03-12
    • 





    

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

    
LI74101
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    DB2 UDE ESE LIN
    • 

  • Fixed component ID
    5765F4104
    • 



Applicable component levels


    

  • R950  PSN
       UP
    • 

  • R950  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            17 October 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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