> > I hope it isn't the first or second one ;)
>
> CREATE or REPLACE FUNCTION item_max_date (int4, varchar) RETURNS
> timestamptz AS '
> select max(dtstamp) from items where channel = $1 and link = $2;
> ' LANGUAGE 'sql';
How about the below?
CREATE or REPLACE FUNCTION item_max_date (int4, varchar) RETURNS
timestamptz AS '
select max(dtstamp) from items where channel = $1 and link = $2;
' LANGUAGE 'sql' STABLE;