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IT38081: HIPER: WRONG RESULT WITH MULTIDIMENSIONAL CLUSTERING (MDC) TABLEAND ZIGZAG JOIN (ZZJN)

A fix is available

Db2 Version 11.1 Mod 4 Fix Pack 7 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 (loose rows) when
- inner table for ZZJN is Multidimensional Clustering (MDC)
table
- row compression enable for MDC table.
- block index predicate (i.e predicate on columns used in the
dimension clause)
- along with data-sargable predicate

Local fix

  • Turn off ZZJN by issuing db2set -im
DB2_REDUCED_OPTIMIZATION="ZZJN OFF"

Problem summary

  • ****************************************************************
* USERS AFFECTED:                                              *
* All                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade server to DB2 v11.1 M4 FP7                           *
****************************************************************

Problem conclusion

  • First fixed in v11.1 M4 FP7

Temporary fix

  • See LOCAL FIX

Comments

  • 



APAR Information




    

  • APAR number
    IT38081
    • 

  • Reported component name
    DB2 FOR LUW
    • 

  • Reported component ID
    DB2FORLUW
    • 

  • Reported release
    B10
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2021-08-20
    • 

  • Closed date
    2021-12-31
    • 

  • Last modified date
    2021-12-31
    • 





    

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

    
IT35926
    

    • 

  • 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  PSN
       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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