"Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)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