On Thu, 2006-06-08 at 17:14, David Fetter wrote: > Pascal, Date, and Darwen have been alleging for years, with increasing > shrillness, that DBMSs should be based on set theory and 2-value > logic. I say "alleging" because they have not backed up this idea > with any actual software that others could test. SQL DBMSs are based > on bag theory[1] and 3-value logic[2]. Until they come up with a > testable system, or Hell freezes over, whichever comes first, Pascal's > book will make a good companion on your shelf to books on > Phlogiston[3] theory, or a decent doorstop, whichever you prefer. Now you're just being ridiculous. Most of those books are nowhere near heavy enough to be a good door stop. And I don't know what your problem with Phlogiston is, it's a perfectly cromulent thoery. (see http://en.wikipedia.org/wiki/Cromulent#Cromulent)
