From: Glyn Astill <glynastill@yahoo.co.uk>
To: Jeff Janes <jeff.janes@gmail.com>
Cc: Pgsql-performance <pgsql-performance@postgresql.org>
Subject: Re: Index scan cost calculation
Date: Tue, 1 Dec 2015 11:22:12 +0000 (UTC)
Message-ID: <1810845895.22017405.1448968932390.JavaMail.yahoo@mail.yahoo.com> (raw)
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>
>Clauses that can't be used in an "indexable" way are excluded from the
>index selectivity, but not from the total query selectivity.
>
>> Or is it just likely that the selection of the new index is just by chance?
>
>Bingo.
>
Got it, thanks! Very much appreciated.
Glyn
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To: pgsql-performance@postgresql.org
Cc: glynastill@yahoo.co.uk, jeff.janes@gmail.com
Subject: Re: Index scan cost calculation
In-Reply-To: <1810845895.22017405.1448968932390.JavaMail.yahoo@mail.yahoo.com>
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