"David E. Wheeler" <da...@kineticode.com> writes:
> On Sep 9, 2009, at 10:15 AM, Tom Lane wrote:
>> But here, "any" would work perfectly fine, since there's no need for
>> any two arguments to be tied to each other or the result.

> Well, only if you write your functions in C. I'd like to be able to  
> write sprintf() in PL/pgSQL. Or PL/Perl, for that matter.

I think you're confusing the point with a secondary issue, which is what
access we provide to these pseudotypes in PLs.  To write sprintf in a
PL, you'd at least need the ability to cast "any" to text.  I guess you
can do that with anyelement, though, so maybe there is nothing much here
except an overly restrictive safety check.

                        regards, tom lane

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