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Message Posted: Mon, 25 Feb 2008 @ 21:21:47 GMT


     
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Subj:   Re: TPump questions
 
From:   Michael Larkins

Hello David:

TPUMP can be a bit tricky to setup and run due to its row at a time nature. To help you as much as I can:


  IGNORE DUPLICATE ROWS  


input record used in INSERT/UPDATE would create a new row that is a duplicate of an existing row - IGNORE = don't put in to error table, default is MARK = put into error table


  IGNORE MISSING ROWS  


input record used in DELETE/UPDATE does not match a row in a table


  IGNORE EXTRA ROWS  


Because Teradata supports NUPI, if an input record to an UPDATE/DELETE causes an activity count > 1, extra rows processed


  We're using an Upsert an I'm not sure what these options can do for me.  


UPSERT (UPDATE/INSERT) to same table in same DML LABEL requires the DO INSERT FOR MISSING UPDATE ROW error treatment option on >DML LABEL command. When this is specified, IGNORE is the default for MISSING UPDATE ROW


  Also, if we've got a Multiset Table with only a NUPI on the table, so whilst the Upsert will mention the full logical primary key, does the table actually have to have a unique constraint added to the table ?  


Not really, but it might be a good idea - see EXTRA ROWS above


  Lastly, I've noticed that a Macro is created by the utility,  


My recommendation is to ALWAYS run TPump and leave the macros alone. Otherwise you are over-riding all TPump error handling, recovery, input processing, and the works.


Regards,

Michael Larkins
Certified Teradata Master
Certified Teradata SQL Instructor



     
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