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Re: GiST indexing tuples

From: "Steinar H(dot) Gunderson" <sgunderson(at)bigfoot(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: GiST indexing tuples
Date: 2007-11-29 20:30:24
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On Thu, Nov 29, 2007 at 03:23:10PM -0500, Matthew T. O'Connor wrote:
> Sorry in advance if this is a stupid question, but how is this better than 
> two index, one on "a" and one on "b"?  I supposed there could be a space 
> savings but beyond that?

You could index on both columns simultaneously without a bitmap index scan.

/* Steinar */

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