AW: SQL99 functions

> Thomas Lockhart <lockhart(at)alumni(dot)caltech(dot)edu> writes:
> > I see mention in SQL99 of function definitions which can
> have IN, OUT,
> > and INOUT arguments. Any thoughts on how this could be supported in
> > Postgres?
>
> I noticed that but haven't quite figured out how it's supposed to fit
> into the SQL worldview at all. Surely
> SELECT foo(x) FROM table
> shouldn't silently mutate into an UPDATE depending on how foo() is
> declared. Exactly where is a function with OUT args useful in SQL?

This is something Oracle pushed through, because that is how they do it.
I prefer the usual way of doing such things where you have parameters
and return values to functions (but return values should be multi column
and multi row capable).

Andreas