From: Tom Lane <tgl@sss.pgh.pa.us>
To: Craig James <craig_james@emolecules.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Query on view radically slower than query on underlying table
Date: Mon, 28 Feb 2011 13:57:36 -0500
Message-ID: <27415.1298919456@sss.pgh.pa.us> (raw)
In-Reply-To: <4D6BE95C.3090102@emolecules.com>
References: <201102281038.04945.cousinmarc@gmail.com>
<4D6B9BC9.1000404@enterprisedb.com>
<4D6BE95C.3090102@emolecules.com>
Craig James <craig_james@emolecules.com> writes:
> My guess (and it's just a wild guess) is that the "left join" is
> forcing a sequence scan or something.
No, that's forcing the other join to be done in toto because it can't
reorder the left join and regular join.
regards, tom lane
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To: pgsql-performance@postgresql.org
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Subject: Re: Query on view radically slower than query on underlying table
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