From: Steinar H. Gunderson <sgunderson@bigfoot.com>
To: Stefano Dal Pra <s.dalpra@gmail.com>
Cc: pgsql-sql@postgresql.org
Cc: pgsql-performance@postgresql.org
Subject: Re: two queryes in a single tablescan
Date: Wed, 17 Oct 2007 15:15:24 +0200
Message-ID: <20071017131524.GC3237@uio.no> (raw)
In-Reply-To: <290a5abc0710170530v215cb2b0q4fa000ad43096a28@mail.gmail.com>
References: <290a5abc0710170530v215cb2b0q4fa000ad43096a28@mail.gmail.com>
On Wed, Oct 17, 2007 at 02:30:52PM +0200, Stefano Dal Pra wrote:
> The main goal would be to get multiple results while scanning the
> table[s] once only
> thus getting results in a faster way.
In 8.3, Postgres will do this for you itself -- if you already have a
sequential scan running against a given table, another one starting in
parallel will simply piggyback it.
/* Steinar */
--
Homepage: http://www.sesse.net/
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To: pgsql-sql@postgresql.org
Cc: sgunderson@bigfoot.com, s.dalpra@gmail.com, pgsql-performance@postgresql.org
Subject: Re: two queryes in a single tablescan
In-Reply-To: <20071017131524.GC3237@uio.no>
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