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Re: Using more tha one index per table

From: Rob Wultsch <wultsch(at)gmail(dot)com>
To: "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Using more tha one index per table
Date: 2010-07-21 07:58:16
Message-ID: AANLkTilBKkfLTLOsiRyjY0MK8oRYqWxmNCx1PZhOMofO@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-docspgsql-performance
On Wed, Jul 21, 2010 at 12:53 AM, A. Kretschmer <
andreas(dot)kretschmer(at)schollglas(dot)com> wrote:

> In response to Elias Ghanem :
> > Hi,
> > I have a question concerning the uses of indexes in Postgresql.
> > I red that in PG a query can not use more than one index per table: "a
> query or
> > data manipulation command can use at most one index per table".
>
> That's not true, but it's true for MySQL, afaik.
>
>
> Andreas
> --
> Andreas Kretschmer
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That is not true either, though MySQL is less good at using bitmap'ed
indexes. 5.0 can use "merge indexes",

-- 
Rob Wultsch
wultsch(at)gmail(dot)com

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