David Fetter writes:
> Basically, there is no way I've found so far to qualify any window
> function in the target list, which makes a giant POLA violation.
The FM points out in at least two places that window functions logically
execute on the output of the WHERE/GROUP BY/HAVING steps. It's
co
On Fri, Jan 16, 2009 at 12:41:59PM -0500, Tom Lane wrote:
> David Fetter writes:
> > We don't appear to be able to use the actual thing in the target list
> > either.
>
> Would you translate that into English? Or at least an example without
> trivial syntax errors?
This works:
SELECT
typ,
David Fetter writes:
> We don't appear to be able to use the actual thing in the target list
> either.
Would you translate that into English? Or at least an example without
trivial syntax errors?
regards, tom lane
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On Fri, Jan 16, 2009 at 12:34:34PM -0500, Tom Lane wrote:
> David Fetter writes:
> > I tried this:
>
> > SELECT
> > typ,
> > ts,
> > rank() over w AS foo_rank
> > FROM
> > foo
> > WINDOW w AS (partition by typ order by ts desc)
> > WHERE
> > foo_rank < 4;
>
> > ERROR
