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- From: green@rwja.umdnj.edu (Cliff Green)
- Newsgroups: comp.databases
- Subject: Re: Help with Clipper5.01!!
- Keywords: Clipper, Read
- Message-ID: <1556@rwja.umdnj.edu>
- Date: 3 Sep 92 01:05:36 GMT
- References: <1992Aug29.161928.1@cc.newcastle.edu.au> <1539@rwja.umdnj.edu> <1992Sep2.023355.8221@cc.uow.edu.au>
- Organization: Robert Wood Johnson Medical School, Piscataway NJ
- Lines: 25
-
- u9048979@cc.uow.edu.au (glen eastment) writes:
- [stuff about presumed prevalidation deleted]
-
- >>I haven't actually tried it, but isn't that what the WHEN clause is for?
- >>(e.g., @ x,y say "Blah" get blah when m->fubar =="TEST")
-
- >Actually the VALID clause would be better.
- >WHEN is for pre-validation, but VALID is for post-validation.
- >Post-validation is handy, because it waits till the user enters the
- >data in the current get. Pre-validation is handy when determining whether
- >to activate that get at all.
- Yeah, I knew that. :)
-
- >eg. get customer number only if (WHEN) customer number has not allready been
- >entered. Check if customer number has been entered correctly (VALID).
- I was under the impression that that was what the original request was
- about: prevalidation.
-
- Anyway, you could probably skin this particular cat in a number of ways.
-
- c--
- Clifford Green Internet: green@rwja.umdnj.edu
- Academic Computing Services voice: 908-463-4436
- UMDNJ-RWJMS fax: 908-463-5252
- #include <fineprint.h>
-