Robert Haas <robertmh...@gmail.com> writes: > On Thu, Nov 13, 2014 at 3:38 AM, Jeff Davis <pg...@j-davis.com> wrote: >> If two backends both have an exclusive lock on the relation for a join >> operation, that implies that they need to do their own synchronization, >> because obviously the lock manager is not doing it for them.
> This doesn't make sense to me. Why would they need to synchronize > access to a relation in order to join it? What's more to the point: why would you take an exclusive lock just to do a join? regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers