Re: full outer join performance - Mailing list pgsql-general

From Tom Lane
Subject Re: full outer join performance
Date
Msg-id 25571.1126635148@sss.pgh.pa.us
Whole thread Raw
In response to full outer join performance  (Ben <bench@silentmedia.com>)
Responses Re: full outer join performance
List pgsql-general
Ben <bench@silentmedia.com> writes:
> Are full outer joins expected to perform much worse than inner joins?

You're getting burnt by the outer join forcing a bad join order.
There's some related discussion here:
http://www.postgresql.org/docs/8.0/static/explicit-joins.html

            regards, tom lane

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