RE: Language enhancements (was CF spec)

[Joel Fritz <JFritz@xxxxxxxxxxxxxxxx>]

I'm of two minds.  On one hand it would be really nice to isolate the
validation logic and cut indicator use to a minimum.  It could make
maintenance easier since the logic of the main program wouldn't be obscured
by the validation logic.  OTOH the validation program might have to know at
least as much about the variables on the screen and in the main program and
their relationships as the main program.  Could make for a long parameter
list.

> -----Original Message-----
> From: James W. Kilgore [mailto:qappdsn@ibm.net]
> Sent: Monday, August 02, 1999 12:56 AM
> To: rpg400-L@midrange.com; midrange-L@midrange.com
> Subject: Language enhancements (was CF spec)
> 
> 
> Hi all,
> 
**************   SNIP  **********************************
> 
> I would like to see a new field level keyword in DDS: VCP
> (Validity Checking Program).
> 
**************   SNIP  **********************************
> 
> The tricky part, to make this work really well, would be to
> make available the entire display record.  Often times one
> would need to know the value of other variables beyond the
> one being tested in order to perform a proper validity
> check.  Like I would need to know the sales order type to
> properly qualify payment terms.  Throw in some
> appropriateness testing above mere hit/no hit on code
> lookup.
> 
> I would be content to specifically code order type as a
> "also pass" variable to the terms code VCP.
> 
> But then again, I have to leave something for RPG to do ;-)
> 
> Something like this, IMHO, would be a great candidate for a
> user written service program to enforce data entry rules.
> Preemptive instead of reactive like a trigger.
> 
> Any thoughts?
> 
> 
> 
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