On 8/5/08, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> wrote:
> >> ERROR: cannot change return type of existing function
> >> HINT: Use DROP FUNCTION first.
>
> you cannot change header of function. It's same as change C header of
> function without complete recompilation.
Thats why plan invalidation for DROP+CREATE is needed.
--
marko