On 2 March 2017 at 16:00, Craig Ringer <cr...@2ndquadrant.com> wrote:
> What about if we ROLLBACK PREPARED after > we made the snapshot visible? Yeah, I'm pretty sure that's going to be a problem actually. You're telling the snapshot builder that an xact committed at PREPARE TRANSACTION time. If we then ROLLBACK PREPARED, we're in a mess. It looks like it'll cause issues with catalogs, user-catalog tables, etc. I suspect we need to construct a temporary snapshot to decode PREPARE TRANSACTION then discard it. If we later COMMIT PREPARED we should perform the current steps to merge the snapshot state in. -- Craig Ringer http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
