Re: outer joins complexity

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Jeff Anto <antojf2001(at)yahoo(dot)fr>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: outer joins complexity
Date: 2002-01-29 21:38:08
Message-ID: 17086.1012340288@sss.pgh.pa.us
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=?iso-8859-1?q?Jeff=20Anto?= <antojf2001(at)yahoo(dot)fr> writes:
> I'm looking for outer join complexity hints.

> I did a vacuum analyze before that. Did PostGres see
> that fichier_prepub is a small table (89 rows)

Small or not, the join order is constrained when you use outer joins,
so the planner has only limited opportunity for being smart. See
http://www.ca.postgresql.org/users-lounge/docs/7.1/postgres/explicit-joins.html

regards, tom lane

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