Re: No exceptions?
Date: Thu, 29 Jun 2006 20:19:33 GMT
>> Bob Badour wrote: >> ... >> >>> The way to avoid exceptions is to treat them as compile-time errors. >> >> >> I take it you really mean "ONE way to avoid exceptions ...". For one >> thing, I am interested in being able to express "x join y" in advance >> of defining a header for "x" (and I would like to evaluate it as well >> if that is logically possible!). >> >> p
> This has me scratching my head. Without a heading, there can be no
> parameters. Without parameters, there can be no arguments. Without
> arguments, there can be no quantifiable proposition. Which leads me
> to, "A relation without a predicate is... What?" I find this
> especially curious because you mention the Closed World Assumption
> in the same post. (Don't forget the Excluded Middle!)
> So, Paul, what are you trying to explore?
My peculiar view doesn't require me to ask "what is the predicate of such and such a relation". This will sound ridiculous to most people I think because one would ask "well, what good is a database whose predicates we don't know?". OTOH, one aspect that for me defines a relational engine is precisely that it must not circumscribe even in the most indirect of ways what predicate a particular relation has, its whole value is in being to manipulate relations without knowing that - otherwise it would be an application!
Apologies if this is metaphysical mumbo-jumbo. Will ponder the CWA and
excluded middle again.
pReceived on Thu Jun 29 2006 - 22:19:33 CEST