On Mon, Sep 29, 2014 at 3:02 PM, Andres Freund <and...@2ndquadrant.com> wrote: > That'll make it really hard to actually implement real MERGE. > > Because suddenly there's no way for the user to know whether he's > written a ON condition that can implement UPSERT like properties > (i.e. the *precise* column list of an index) or not.
Exactly. The difficulty isn't doing what Kevin says so much as doing so and then at a later date taking that thing and making it into a fully featured MERGE. We'll be painted into a corner. That's bad, because as I've said I think we need MERGE too (just far less urgently). -- 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
