Neil Conway <neilc@samurai.com> writes:
> Bruno Wolff III wrote:
>> Functions are just black boxes to the planner.
> ... unless the function is a SQL function that is trivial enough for the
> planner to inline it into the plan of the invoking query. Currently, we
> won't inline set-returning SQL functions that are used in the query's
> rangetable, though. This would be worth doing, I think -- I'm not sure
> how much work it would be, though.
Yeah, I've been thinking the same. It seems like it shouldn't be unduly
difficult --- not harder than inlining scalar-valued SQL functions, just
different validity conditions.
regards, tom lane