Markus Wanner <mar...@bluegap.ch> wrote: > Kevin Grittner wrote: >> As I understand it, Greg's line of thinking is that we should use >> a technique which has never proven practical on a large scale: >> matching database changes against a list of predicate lock >> expressions. > > I find that approach to predicate locking pretty interesting. Sure, I find it interesting, too. Just not practical. > unlike others, it scales with the number of concurrently held > locks. Times the number of checks for conflicting locks. So, O(N^2). No thanks. Now if there is a breakthrough in that technology which allows it to compete favorably with techniques which model the logical predicates against database structures, I'm all ears. -Kevin
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