On Fri, Oct 3, 2014 at 3:42 PM, Peter Geoghegan <p...@heroku.com> wrote: >> We routinely pick very >> different plans based on the presence or absence of an index, and >> we use special snapshots in the course of executing many DML >> statements (if FK triggers are fired)
Apart from FK snapshots, we also use dirty snapshots for unique index enforcement, obviously. That doesn't mean that it's the "command/xact snapshot", though. It's just a special constraint enforcement mechanism. -- 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
