Re: What to call this operator?

Jon Heggland wrote:
> In article <1120230564.593323.241990_at_g43g2000cwa.googlegroups.com>,
> marshall.spight_at_gmail.com says...
> > > > With join, all keys are preserved.
> > >
> > > Umm... they are? What do you mean by "preserved"? Perhaps I
> > > misunderstand you, but a key of one of the operands is not necessarily a
> > > key of the result.
> >
> > Okay. What rule would you propose?
>
> I'm not sure I understand you. Surely the keys of a join result are
> determined by logic, not by rules one might propose?

You're quibbling over terminology. What rule, derived via logic, would you propose? What's the right answer? Phrase it any way you like; I just want to know what the correct answer is.

Marshall Received on Sat Jul 02 2005 - 20:31:31 CEST