Re: complicated query (newbie..)

From: Marcin Krol <mrkafk(at)gmail(dot)com>
To: Sam Mason <sam(at)samason(dot)me(dot)uk>
Cc: PGSQL Mailing List <pgsql-general(at)postgresql(dot)org>
Subject: Re: complicated query (newbie..)
Date: 2009-04-09 17:25:42
Message-ID: 49DE2F96.7000308@gmail.com
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Sam Mason wrote:
> This is a big hint that things are going wrong. You need those quotes
> in there, an "integer" is a plain number and not a date.
>

This one does work in the sense of selecting out the wrong host but it
still produces nothing but NULLs!

SELECT h.id, r.id, r.start_date, r.end_date
FROM hosts h
LEFT JOIN (reservation_hosts m INNER JOIN reservation r
ON m.reservation_id = r.id
AND (r.start_date,r.end_date) OVERLAPS
('2009-04-09'::date,'2009-04-10'::date))
ON h.id = m.host_id
WHERE h.id NOT IN (
SELECT m.host_id
FROM reservation r, reservation_hosts m
WHERE r.id = m.reservation_id
AND m.host_id IS NOT NULL
AND (r.start_date,r.end_date) OVERLAPS
('2009-04-09'::date,'2009-04-10'::date)
ORDER BY h.id, r.start_date)

Regards,
mk

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