On 2015-05-20 11:24:06 -0700, Peter Geoghegan wrote: > On Wed, May 20, 2015 at 10:37 AM, Andres Freund <and...@anarazel.de> wrote: > > But you *can* use a exclusion constraint for DO NOTHING. Just not (yet) > > for DO UPDATE. > > FWIW, I don't think exclusion constraint DO UPDATE support is ever > going to be useful.
Why? Even if maybe not directly under the guise of exclusion constraints themselves, but I do think it's an interesting way to more easily allow to implement unique constraints on !amcanunique type indexes. Or, more interestingly, for unique keys spanning partitions. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
