Il 14/01/2010 15:47, Dimitri Fontaine ha scritto:
Matteo Beccati<p...@beccati.com> writes:
WITH RECURSIVE t (mailbox, uid, date, subject, sender, has_attachments,
parent_uid, idx, depth) AS (
SELECT mailbox, uid, date, subject, sender, has_attachments, parent_uid,
uid::text, 1
FROM arc_messages
WHERE parent_uid IS NULL AND mailbox = 15
UNION ALL
SELECT a.mailbox, a.uid, a.date, a.subject, a.sender, a.has_attachments,
a.parent_uid, t.idx || '.' || a.uid::text, t.depth + 1
FROM t JOIN arc_messages a USING (mailbox)
WHERE t.uid = a.parent_uid
) SELECT * FROM t ORDER BY idx
Any improvements to sorting are welcome :)
What I'd like would be to have it sorted by activity, showing first the
thread which received the later messages. I'm yet to play with CTE and
window function myself so without a database example to play with I
won't come up with a nice query, but I guess a more educated reader will
solve this without a sweat, as it looks easier than sudoku-solving,
which has been done already :)
Eheh, that was my first try as well. CTEs look very nice even though I'm
not yet very comfortable with the syntax. Anyway both for date and
thread indexes sort is the other way around, with newer posts/threads at
the bottom. Again I'll give it a try as soon as I find time to work
again on it.
Cheers
--
Matteo Beccati
Development & Consulting - http://www.beccati.com/
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
