Re: Dreaming About Redesigning SQL

"Mikito Harakiri" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> "Paul G. Brown" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> >    RELATION Contains ( Domain Polygon,  Range Polygon);
> 
> That looks like a very strange relation to me. Lets rewrite it like this
> 
> RELATION isSubsetOf ( Domain Polygon,  Range Polygon);
> 
> to see what I mean.

  Yeah, that's the idea. I choose the name to highlight the potential 
  ambiguity if you use only relation names.

  RELATION Equals ( Domain Polygon, Range Polygon );
  RELATION Equals ( Domain INTEGER, Range INTEGER );