Tom Lane wrote:
> SQL92 has this under Leveling Rules:
>
> 1) The following restrictions apply for Intermediate SQL:
>
> a) A <declare cursor> shall not specify INSENSITIVE.
>
> b) If an <updatability clause> of FOR UPDATE with or without
> a <column name list> is specified, then neither SCROLL nor
> ORDER BY shall be specified.
>
> So SCROLL with FOR UPDATE is a Full-SQL-only feature. (In SQL99 it's
> broken out as Feature F831-01, but that doesn't tell you much about
> how hard it is or whether most implementations have it.)
Oh, ok then.
> I don't feel particularly bad about not supporting every such feature.
> I think Simon's recommendation is definitely the way to go for 8.3 ---
> if anyone is motivated to relax the restriction in the future, they can
> figure out how to resolve the corner cases then.
Ok. Looking at what you committed, I completely misunderstood what you
were saying earlier. Yeah, let's leave it like that for now. A nice "not
supported" error message is perfectly fine, as long as we can avoid the
unexpected behavior.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com