>>>>> "David" == David G Johnston <david(dot)g(dot)johnston(at)gmail(dot)com> writes:
>> Prohibiting IS NOT NULL is not on the cards; it's very widely used.
David> Yet changing how it behaves, invisibly, is?
Did you mean prohibiting it only for composite-type args? It's obviously
widely used for non-composite args.
I would expect that >95% of cases where someone has written (x IS NOT
NULL) for x being a composite type, it's actually a bug and that NOT (x
IS NULL) was intended.
--
Andrew (irc:RhodiumToad)