Re: database design method

> That is what I meant. I'm not saying that they should be possible. What I'm
> wondering about is if there are very good reasons to forbid them.

OK, I got it now, thanks. How high in priority are recursive definitions in your opinion?

> >>Why does it not have recursion?
> >
> >Poor guys! They have done quite a lot in
> >1,5 years! Don't be too harsh on them ;-)
>
> Oh, nothing but respect fo these guys.

But you haven't even used Dataphor!
Do you really take their word for it?? ;-)

> >> >What on earth could be more declarative than relational operators???
> >>
> >> The relational calculus.
> >
> >Are they not equivalent?
>
> Yes, but the general idea is that the calculus is closer to how people
> actually think and does not imply so much an execution order as the algebra
> does.

Agreed. But algebra only _looks_ like imposing an order. It doesn't, of course.

regards,
Lauri Pietarinen

>
Received on Thu Nov 14 2002 - 13:27:42 CET