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Truncate target Table based on rows in a Target Flatfile

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I have a workflow which loads data from a Flat file to a Stage Table after a few basic checks on a few columns. In the mapping, each time my check fails (meaning if the column has an invalid value) , I make an entry to a ErrorFlatFile with an error text.

Now , I have two targets in my mapping. One being the Stage table and the other is the Error Flat File.

What i want to achieve is this ? Even if there is one entry in the ErrorFlatFile (indicating there is an error in the source file ) , I want to truncate the Target Stage Table.

Can someone Please help me with how i can do this at the session level.

posted Sep 1, 2014 by Sunil

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1 Answer

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You would need one more session. Make a dummy session (one that reads no data) and add a Pre or Post-SQL statement:

TRUNCATE TABLE YourTargetStageTableName

Create a link from your existing session to the dummy one and add the condition like:

$PMTargetName@numAffectedRow > 0

replacing TargetName with the name of your ErrorFlatFileName. The second session should only be executed in case when there was an entry made to the error file. If there will be no errors, it should not be executed.

answer Sep 2, 2014 by Shweta Singh
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