> >or
> >use any stored procedure as a function
>
> That's sort of a problem since a stored procedure
> may return one value, one row of values, or many
> rows of values. If we restrict it to procedures
> that return exactly one value it makes mores sense
> to me.
>

Blue sky here -- languages like Python and Perl have
the notion of returning tuples (one row of values)
or lists (many rows). An extension to SQL that
allows for lists & tuples will allow procedures
to be used this way.

Dave