Yay! I'm finally allowed to (and starting to) port the application I'm working on at work from Oracle to PostgreSQL.
Oh, and I note that PostgreSQL 8.4 (beta out yesterday) introduces support for WITH RECURSIVE queries (closures, or for you Oracle folks, CONNECT BY, if I understand the feature correctly), the lack of which has always made tree / graph type data structures a pain to work with in current and older versions. Of course, many other improvements, too.
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