Re: database design method
Date: 12 Nov 2002 23:49:36 -0800
> >With user defined types, one can define whatever type one wants.
> That depends upon what the minimal requirements are for defining it. If I
> have to define a function that outputs the representation of the value then
> there is a problem. It also depends on how exactly you can denote or create
> new values. As long as these things are not exactly specified it is not
> clear if you can use abstract identifiers or not.
Is there a theoretical problem with just using plain integers as surrogates or "object id's"? Or is it just that we want to prevent the user from comparing apples and oranges?
Lauri Pietarinen Received on Wed Nov 13 2002 - 08:49:36 CET