"scott.marlowe" <[EMAIL PROTECTED]> 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...


---------------------------(end of broadcast)---------------------------
TIP 3: if posting/reading through Usenet, please send an appropriate
      subscribe-nomail command to [EMAIL PROTECTED] so that your
      message can get through to the mailing list cleanly

Reply via email to