"David E. Wheeler" <da...@kineticode.com> writes:
> On Sep 8, 2009, at 9:57 AM, Tom Lane wrote:
>> Intentionally so, because there's not a whole lot you can *do* with an
>> ANY parameter, other than checking it for null.  Perhaps the real
>> question is about what semantics you're expecting for these
>> unconstrained parameters.

> For my purposes, I guess implicit casting for comparing values, as in

>      arg_a IS DISTINCT FROM arg_b

Surely you'd want arg_a and arg_b constrained to the same type,
otherwise there is no certainty that that means anything at all.

                        regards, tom lane

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