Re: Literature on physical algebra

From: Leandro Guimarães Faria Corsetti Dutra <leandrod_at_mac.com>
Date: Tue, 09 Oct 2001 13:55:03 -0300
Message-ID: <3BC32BE7.5000405@mac.com>

Kai Großjohann wrote:

> For a database system, one needs a query language. I have this. One

I hope is a valid D, according to Date and Darwen.

> also needs a logical algebra to provide a starting point for query
> optimization. I also have this. But for actually doing query
> optimization, one needs a physical algebra. I still need the physical
> algebra.

There's no such thing... algebra is a logical access and structure issue; at the physical layer you need good old access methods, and a mapping strategy and language. Received on Tue Oct 09 2001 - 11:55:03 CDT