IBM Support

JR31879: SEMANTICS CHECK FAILED TO BLOCK MERGE OPERATION THAT TAKES A QUERY OR VIEW OVER NICKNAME AS ITS TARGET TABLE

Fixes are available

DB2 Version 9.1 Fix Pack 8  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 9  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 10  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 11  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12  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

  • create table archive (activity varchar(100), description
varchar(100)) options ( REMOTE_SERVER 'UDBSERVER', REMOTE_SCHEMA
'IIDEV2' );
create table t_activities (activity varchar(100), description
varchar(100)) ;
--Following query should be blocked during semantics check,
otherwise it can consequently cause error or crash, since
Federation does not support nickname or query over nickname as
target table of MERGE.
MERGE INTO (select * from archive where archive.activity like
'123' ) as ar
  USING (SELECT activity, description FROM t_activities) ac
  ON (ar.activity = ac.activity)
  WHEN MATCHED THEN
    UPDATE SET
        (activity, description) = (ac.activity, ac.description)
  WHEN NOT MATCHED THEN
    INSERT
        (activity, description)
        VALUES (ac.activity, ac.description) ;

Here are the condition where a query may hit this problem:

1) There must be a MERGE statement, which takes a query
involving nickname as its target table

Local fix

  • Not to use MERGE with query of nickname as the target table

Problem summary

  • Users affected:
   Users of the DB2 for LUW Homogeneous Federation Feature or
InfoSphere Federation Server
Problem description and summary:
   See error description.

Problem conclusion

  • Problem was first fixed in Version 9.1 FixPak 8 (s090823).
This fix should be applied on the federation server.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    JR31879
    • 

  • Reported component name
    FEDERATED RUNTI
    • 

  • Reported component ID
    5724N9703
    • 

  • Reported release
    910
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2009-02-02
    • 

  • Closed date
    2009-10-07
    • 

  • Last modified date
    2009-10-07
    • 





    

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

    • 

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

    
JR31881
    

    • 



Fix information


    

  • Fixed component name
    FEDERATED RUNTI
    • 

  • Fixed component ID
    5724N9703
    • 



Applicable component levels


    

  • R910  PSN
       UP
    • 

  • R911  PSN
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCAVPX","label":"Federated Server"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.1","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            07 October 2009
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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