--On 23. Januar 2013 15:12:00 +0000 Alvaro Herrera
<alvherre@alvh.no-ip.org> wrote:
> This patch introduces two additional lock modes for tuples: "SELECT FOR
> KEY SHARE" and "SELECT FOR NO KEY UPDATE". These don't block each
> other, in contrast with already existing "SELECT FOR SHARE" and "SELECT
> FOR UPDATE". UPDATE commands that do not modify the values stored in
> the columns that are part of the key of the tuple now grab a SELECT FOR
> NO KEY UPDATE lock on the tuple, allowing them to proceed concurrently
> with tuple locks of the FOR KEY SHARE variety.
Out of curiousity, shouldn't we update chapter 13.3.2 in the docs to
mention the additional new lock modes, too?
--
Thanks
Bernd