Tom Lane <t...@sss.pgh.pa.us> wrote: > [ shrug... ] We *have* that property, for sane cases such as > adding and subtracting a fixed number of days. Adding and subtracting months is very common in business software. I have seen application bugs related to this many times. I suspect that such bugs would occur less often with a more abstract date type and a date normalization strategy for mapping to the calendar than it does with typical techniques; but it's not something I would propose that PostgreSQL move toward. (Well, maybe some day as a pgfoundry project or something, given that such a system could plug right in, but not as the default date handling -- for compatibility, if nothing else.) I was just reacting to the assertion that date abstraction was such a stupid thing to do that nothing else proposed in a document which supports it is worth considering. The Turing Award isn't usually awarded to those proposing complete nonsense. -Kevin
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