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Re: Merge Join vs Nested Loop

From: Tobias Brox <tobias(at)nordicbet(dot)com>
To: Scott Marlowe <smarlowe(at)g2switchworks(dot)com>
Cc: Tobias Brox <tobias(at)nordicbet(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,pgsql-performance(at)postgresql(dot)org
Subject: Re: Merge Join vs Nested Loop
Date: 2006-09-27 15:36:19
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
[Scott Marlowe - Wed at 10:31:35AM -0500]
> And remember, you can always change any of those settings in session for
> just this one query to force the planner to make the right decision.

sure ... I could identify the most problematic queries, and hack up the
software application to modify the config settings for those exact
queries ... but it's a very ugly solution. :-)  Particularly if Tom Lane
is correct saying the preferance of merge join instead of nested loop is
indeed a bug.

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Subject: Re: Forcing the use of particular execution plans
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