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On 15/02/2012 18:07, daniela florescu wrote: >> What Michael says. > I don't think "what Michael says", Frank. But I don't think it matters either. > > Most ideas in CS can be be lineaged down in one way or the other in work that > has been done in 50-60ties (those guys had all the good ideas..:-) > > However, the closest approximation, the and most correct and complete implementation of a > running functional database was still O2: it was not Oracle, yet was not only a small prototype > with a bunch of slides attached to it. > > I strongly advise people to look into query processing in the time of the O2. Lots of lessons to learn. > > O2 was a great project and I agree that its query language is well worth studying. The project I worked on in the early 1990s, Fujitsu's ODB-II, owed a great deal to O2. IRIS didn't, it was in a quite different tradition and was earlier. One of the reasons O2 was a great project was that it took input from the functional database research rather than (as with other object databases) merely trying to be a persistent object-oriented programming language. Michael Kay Saxonica
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