On Thu, Mar 01, 2007 at 06:23:37PM +0100, Jonathan Scher wrote: > >Because when it drops the old copy of the table there had better not be > >any concurrent readers.
> Then, is it possible to take a share update exclusive lock until the new > table is ready, then an access exclusive one only in order to switch > tables? I don't think it's already coded like that... That's lock upgrading, which opens you up to deadlocks. If another process grabs a lock after your update exclusive, you're not going to be able to upgrade it. Have a nice day, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to > litigate.
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