RE: How to get called program to write records to physical file member.

This post received a lot of answers pertaining to the possibility of the two programs involved running in different activation groups.

Now that it has been affirmed that that was the case, I would ask :

When would it be advisable to explicitly compile a program to run in the default activation group, particularly when named activation groups are being used?
Why not systematically compile so that the program runs in the same group as the caller?

-----Message d'origine-----
De : rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] De la part de Simon Coulter
Envoyé : jeudi 29 avril 2010 01:02
À : RPG programming on the IBM i / System i
Objet : Re: How to get called program to write records to
physical file member.


On 29/04/2010, at 6:27 AM, Bryce Martin wrote:

So when I did the OVRDBF, (which I agree is kludgy),

I wonder how you and Scott arrived at this conclusion? The
ability to change the file being processed, change the
attributes of that file, and even change the records
processed by a program via correct use of OVRxxx or in
conjunction with OPNQRYF is simply brilliant. It can, and
frequently did, make programming much easier than it might
otherwise be and most (perhaps all) other platforms have
nothing like it. Unix file redirection is a poor substitute.

Just because newer methods of accomplishing similar ends
exist now (e.g., EXTFILE to replace a simple redirection
override, or SQL to replace OPNQRYF) doesn't detract from the
original great idea.

One could even argue that the newer alternatives are less
flexible because now the program itself needs to know what's
happening--the changes are not as transparent to it the way
they are with OVRxxx.
EXTFILE results in much tighter coupling than OVRDBF.

I would not discount using the alternatives when appropriate
but I would never say that OVRxxx is a kludge.

Regards,
Simon Coulter.
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