"Pavel Stehule" <pavel.stehule@gmail.com> writes:
> I propose two kinds of functions:

> a) generic functions - this function allows any params without any
> implicit casting (it can implemented only in C language).

Can't you do that already with ANYELEMENT, or at the worst ANY?

> It allows unspecified number of params
> without parser changes.

Why is that a good idea (and if you think it won't take parser changes,
you're wrong)?

> Limits: only one function with specified name can exists in schema.

This is why it's a bad idea. Please note that the unique index on
pg_proc cannot enforce that, even if we wanted such a restriction.

regards, tom lane

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