Joel Burton <jburton@scw.org> writes:
> . add a command like ALTER FUNCTION foo(text) TO foo(text) returns text as
> ....
This is on the TODO list already, I believe.
> This would seem to require that the new function would take the same
> parameters (and return the same?) as the old function.
If it doesn't take the same parameters then it's not the same function
at all, so that part is a nonissue. We'd have to disallow change of
return type as well.
> Perhaps this is tricky,
Updating pg_proc wouldn't be hard. What's missing is a notification
mechanism that would cause cached copies of the function to get
replaced. A crude first cut could just ignore that issue and still be
extremely useful for development ...
regards, tom lane