| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | David Fetter <david(at)fetter(dot)org> |
| Cc: | "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>, PG Hackers <pgsql-hackers(at)postgresql(dot)org>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Question regarding new windowing functions in 8.4devel |
| Date: | 2009-01-16 17:34:34 |
| Message-ID: | 8279.1232127274@sss.pgh.pa.us |
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| Lists: | pgsql-general pgsql-hackers |
David Fetter <david(at)fetter(dot)org> 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: syntax error at or near "WHERE"
> LINE 8: WHERE
> ^
RTFM ... WINDOW goes after WHERE (and GROUP BY, HAVING, ...)
Also, we have never allowed SELECT-alias references in WHERE;
window functions have nothing to do with that.
regards, tom lane
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