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  3. July 2005

RE: Create DDL from exiting PF&LFs

Thanks for the reference Joe.

It is an interesting article and answers a number of questions relating to
some of the rumors floating around that I hadn't had time to check out.

  >> The old-style DDS files do the checking on the read.

This is the only problem I have with the piece.  As far as I know the DB
does not do any checking.  The application itself simply "blows up" when
attempting to use the bad data.  That's why COBOL apps don't suffer as badly
as RPG from DD errors - if they don't touch the field they don't blow up.
RPG on the other hand moves every field from the buffer to its storage
location.  It is that move that causes the explosion on the read.

I do agree though that having it done on the write is great - wonder what
error RPG signals if the data is bad?  I'll write a test case sometime when
I have 5.


Jon Paris
Partner400

www.Partner400.com
www.RPGWorld.com

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