Re: What are the benefits of using a clustered index?

On Tue, 2009-03-17 at 15:26 -0700, Mike Christensen wrote:
> I would only like this as a feature if the optimizer can really take
> advantage of this.  Clustering on every insert or update just for the
> fun of it won't really give us anything but more expensive writes.
>
> I kinda figured if SQL Server and Oracle have it, they probably take
> full advantage of it for reads..

With SQLServer and Oracle the optimization is implicit in the physical
design of the index. The Postgres equivalent would be a grouped index,
not necessarily clustered in the same way.

--
 Simon Riggs           www.2ndQuadrant.com
 PostgreSQL Training, Services and Support