Re: Separation of Relational Engine from Domain Math

From: Alfredo Novoa <alfredo_novoa_at_hotmail.com>
Date: 10 Apr 2006 12:05:42 -0700
Message-ID: <1144695942.150004.66440@v46g2000cwv.googlegroups.com>

topmind ha escrito:

> This is based on a question I raised on c2.com:
>
> The issue of seperation of relational from the "domain expression
> engine" recently came up in a debate where the somebody claimed that
> finding the nearest N points to a given point in a geographic map
> system would have to traverse every point under relational

The typical confusion between model and implementation.

, and thus be
> O(n). A solution is to move such operations to the domain language
> instead of let the query language directly do it.

A bad solution. A better solution would be to use an efficient optimizer for this job.

Regards
Alfredo Received on Mon Apr 10 2006 - 14:05:42 CDT