Re: Date and McGoveran comments on view updating 'problem'

"paul c" <toledobythesea_at_oohay.ac> wrote in message news:5az1l.5523$E46.437_at_newsfe21.iad...
> Brian Selzer wrote:
>> "paul c" <toledobythesea_at_oohay.ac> wrote in message
>> news:Wve%k.3357$yK5.661_at_edtnps82...
> ... Also, you appear to be laboring under the
>> delusion that relational algebra somehow includes relational assignment.
>
> I feel no such weight on top of me because I know of no such thing as
> 'relational assignment', rather there is language assignment. My focus is
> algebraic as I'll try to explain later, but as far as that I would agree
> that the D&D A-algebra that I'm familiar with has no such thing as
> 'language assignment'. I don't think I ever said otherwise. I think
> Date's Assignment Principle is simply a test for whether a language's dbms
> respects the algebra it's premised on.

Perhaps I was reading too much into your post. Received on Mon Dec 15 2008 - 23:13:12 CET