"scott.marlowe" <scott.marlowe@ihs.com> writes:
> Basically, Postgresql uses an MVCC locking system that makes massively
As discussed, uh, a few days ago, this particular problem is not caused by
MVCC but by postgres having a general purpose aggregate system and not having
special code for handling min/max. Aggregates normally require access to every
record they're operating on, not just the first or last in some particular
order. You'll note the LIMIT 1/DISTINCT ON work-around works fine with MVCC...
--
greg
