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Even if the migration worked very well (a long shot), God help the poor souls who try to maintain the resulting code.


-----Original Message-----
From: Nathan Andelin [mailto:nandelin@xxxxxxxxx]
Sent: Wednesday, January 11, 2017 12:16 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: Road Map to move a home grown application from RPG to DB2 SQL or to any other data base platform

There seems to be an implied assumption in the question that existing RPG and DDS (DSPF, PRTF, PF, LF) might facilitate an automated conversion / migration. However, that's a bad assumption. Even if someone were to offer automated migration tools based on existing RPG and DDS code, the final output would be disastrous, the implementation would be problematic, and end-users would balk when they tried to use the application. There's just too big of a paradigm shift to make it work.

Migrating database containers (i.e. tables and indexes) can be automated.
However, most likely you'd end up needing to refactor the DB design before trying to build on top of it.

I could explain more tools if we were talking about migrating applications off other platforms to IBM i.





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