Peter Eisentraut <peter_e@gmx.net> writes:
> I think what you want here is some way to define a function that takes an
> arbitrary number of arguments of arbitrary type and let the function figure
> everything out. I see no reason why this can't be a variant on CREATE
> FUNCTION, except that of course you need to figure out some API and function
> resolution details.
We've already got "variadic any" functions --- the problem is to tell
the parser what the function's result type will be, given a particular
parameter list. I agree that hooking transformExpr is not exactly the
most ideal way to attack that from a performance or complexity
standpoint.
regards, tom lane
