From: chester c young <chestercyoung@yahoo.com>
To: sql pgsql <pgsql-sql@postgresql.org>
Subject: general question on optimizer
Date: Sat, 10 Nov 2007 16:23:42 -0800 (PST)
Message-ID: <994792.8624.qm@web54302.mail.re2.yahoo.com> (raw)
I have found that in many complex queries left join is exponentially
faster than a (not) exists clause.
I don't understand why, generally speaking, this is so frequently so
effective.
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To: pgsql-sql@postgresql.org
Cc: chestercyoung@yahoo.com
Subject: Re: general question on optimizer
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