Re: UPSERT wiki page, and SQL MERGE syntax

On Thu, Oct 16, 2014 at 8:00 PM, Peter Geoghegan <pg@heroku.com> wrote:
> Basically, it's difficult to make this work for technical reasons
> precisely because what I have here isn't join-like. Can I easily
> disallow "OLD.*" in a RETURNING clause (recall that we only project
> inserted tuples, as always)? Even if you think that's okay, I'd rather
> give an error message indicating that that makes no sense, which is
> what happens right now.

Well OLD and NEW are also not joins yet we expose them this way. It
always seemed like a hack to me but better one hack than two different
inconsistent hacks, no?

Independent of all that though. CONFLICTING() isn't clear to me --
conflicting is a relative property of two or more objects which are
both (or all) conflicting with each other. Which one does
"CONFLICTING" refer to here?

-- 
greg