From: | hubert depesz lubaczewski <depesz(at)depesz(dot)com> |
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To: | "Dickson S(dot) Guedes" <listas(at)guedesoft(dot)net> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pg-dev <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: generate_series from now to infinity... |
Date: | 2009-05-17 17:22:02 |
Message-ID: | 20090517172202.GA26881@depesz.com |
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Lists: | pgsql-hackers |
On Sun, May 17, 2009 at 01:38:35PM -0300, Dickson S. Guedes wrote:
> I suggested him to use LIMIT.
interesting. I just tested (on beta1), that while limit works in this
query:
SELECT generate_series(now(), CAST('infinity'::date AS timestamp), interval '1 hour') limit 3;
i.e. it returns 3 rows instantly,
it doesn't for this query:
SELECT i from generate_series(now(), CAST('infinity'::date AS timestamp), interval '1 hour') as x (i) limit 3;
which (as far as i understand it) should be the same.
why is it not limiting generate_series in the second example? is it
intentional?
Best regards,
depesz
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