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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jim Nasby <jnasby@enova.com>
cc: "pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: Problems with hash join over nested loop
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References: <526EDDF7.3090102@enova.com>
Comments: In-reply-to Jim Nasby <jnasby@enova.com>
 message dated "Mon, 28 Oct 2013 16:58:15 -0500"
Date: Mon, 28 Oct 2013 19:13:55 -0400
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Jim Nasby <jnasby@enova.com> writes:
> I've been working on trying to normalize a table that's got a bunch of text fields. Normalizing the first 4 has been a non-issue. But when I try and normalize 2 additional fields a bunch of query plans go belly-up.

Try increasing join_collapse_limit/from_collapse_limit.  I'm a bit
confused by your description but I think maybe you've got more than 8
relations in the subqueries.

			regards, tom lane


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