Re: A different definition of MINUS, part 4

Bob Badour wrote:
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Are you familiar with Fabian's observations regarding 'denormalization for performance' ? He observes that such 'denormalized' schemas are slower if one actually declares the constraints; thereby suggesting any performance difference comes at the cost of integrity.
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I think I agree with him and I'd even go further and say that the only kind of denormalization there is, is 'logical denormalization', in a nutshell,logical re-casting of logical expressions. I think when most people talk of 'denormalization' what they are really talking about are physical re-arrangements but always in the back of their minds is a rigid, simplistic misconception, which they imagine is some kind of governing principle, that the physical image is a direct image. There is no such thing as 'physical denormalization' in the first place.
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