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OLDVAL return .NULL.
Message
De
18/06/2001 09:58:57
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
 
 
À
18/06/2001 09:50:34
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00520390
Message ID:
00520574
Vues:
13
>As I've learned, it surely seems to.
>
>But I wonder why when the table does not have NULL permissable in any of its fields. I would have thought that an APPEND BLANK in that case would surely put theequivalent of EMPTY() into each field.
>
>Regards
>JimN

I pressume the reasoning of the VFP team is something like this: "the previous value for this field is undefined". This makes sense, in a way...

As for programming in actual practice, I found I had to use NVL() in some cases, to avoid certain error messages.

Regards, Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
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