From: Achilleus Mantzios <achill@matrix.gatewaynet.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: An unresolved performance problem.
Date: Fri, 9 May 2003 16:11:49 -0200 (GMT+2)
Message-ID: <Pine.LNX.4.44.0305091611210.7304-100000@matrix.gatewaynet.com> (raw)
In-Reply-To: <29797.1052483506@sss.pgh.pa.us>
On Fri, 9 May 2003, Tom Lane wrote:
> Achilleus Mantzios <achill@matrix.gatewaynet.com> writes:
> > If so, how can one find the correlation between the ordering
> > of a table and a multicolumn index?
>
> Well, it is surely no better than the correlation of the index's
> first column --- what is that?
it is 1
>
> regards, tom lane
>
--
==================================================================
Achilleus Mantzios
S/W Engineer
IT dept
Dynacom Tankers Mngmt
Nikis 4, Glyfada
Athens 16610
Greece
tel: +30-210-8981112
fax: +30-210-8981877
email: achill@matrix.gatewaynet.com
mantzios@softlab.ece.ntua.gr
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To: pgsql-sql@postgresql.org
Cc: achill@matrix.gatewaynet.com, tgl@sss.pgh.pa.us, pgsql-performance@postgresql.org
Subject: Re: An unresolved performance problem.
In-Reply-To: <Pine.LNX.4.44.0305091611210.7304-100000@matrix.gatewaynet.com>
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