Re: Decline of Science: Computer Science and Databases
Date: Sat, 09 Nov 2002 12:57:12 GMT
Message-ID: <3dcd0319.2842847_at_news.wanadoo.es>
On Sat, 9 Nov 2002 00:08:25 +0100, "Carl Rosenberger" <carl_at_db4o.com> wrote:
>class Contract(){
> String name;
> Position[] positions;
> // 30 other members typical to all contracts
>}
>class BuildingEngineeringContract extends Contract(){
> // 30 building engineering specific members
>}
var Contract real relation {Contract Char, //30 other attributes
typical to all contracts} key {Contract}
var ContractPositions real relation {Contract Char, Position Char}
key {Contract, Position}
var BuildingEngineeringContract real relation {Contract Char, // 30
building engineering specific attributes}
key {Contract}
foreign key {Contract} references Contract;
foreign key {Contract} references Contract;
>Houston, I think the problem is on your side.
Your post reflects a deep ignorance about database theory.
Alfredo Received on Sat Nov 09 2002 - 13:57:12 CET