Re: field validation (was Re: COBOL/DB2 Date edit question)

Frank Swarbrick wrote:

This brings to mind an interesting issue that we've been struggling with for
years at our shop. This issue being, where does input validation belong?

Our system had it in several places. The date/time procedure I've mentioned before (P315) had validation on every routine in it. We'd have programs that validated screen input, then passed it to a batch program that re-validates the same input. While that may seem wasteful, it is of note that the batch program could be run without going through the screen.

When we put a GUI front-end, there were even more edits that happen on it, before the page is even submitted! But, again, there are ways to script things that don't go through the GUI, so a program can't assume that the input has been validated before.

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Relevant Pages

  • Re: field validation (was Re: COBOL/DB2 Date edit question)
    ... mentioned before had validation on every routine in it. ... programs that validated screen input, then passed it to a batch program ... note that the batch program could be run without going through the screen. ... When we put a GUI front-end, there were even more edits that happen on it, ...
    (comp.lang.cobol)
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  • Re: field validation (was Re: COBOL/DB2 Date edit question)
    ... mentioned before had validation on every routine in it. ... it is of note that the batch program could be run without ... When we put a GUI front-end, there were even more edits that happen on ... You can't have too much data validation. ...
    (comp.lang.cobol)