On Fri, Jul 18, 2014 at 11:32 AM, Peter Geoghegan <p...@heroku.com> wrote: > Well, maybe. If the genericity of this syntax isn't what people want, > I may go with something else.
By the way, I didn't mention that there is now also the optional ability to specify a "merge on" unique index directly in DML. It would be much nicer to specify a sort key instead, but that might be tricky in the general case. I imagine that other systems solve the problem by being very restrictive in what will be (implicitly) accepted as a merge-on index. Seemingly there are problems with all major SQL MERGE implementations, so I don't necessarily expect to be able to draw lessons from them in any way here. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
