On Fri, Jun 26, 2020 at 10:50 AM Masahiko Sawada <masahiko.saw...@2ndquadrant.com> wrote: > > On Tue, 23 Jun 2020 at 13:26, Amit Kapila <amit.kapil...@gmail.com> wrote: > > > > > > I think at this stage it is important that we do some study of various > > approaches to achieve this work and come up with a comparison of the > > pros and cons of each approach (a) what this patch provides, (b) what > > is implemented in Global Snapshots patch [1], (c) if possible, what is > > implemented in Postgres-XL. I fear that if go too far in spending > > effort on this and later discovered that it can be better done via > > some other available patch/work (maybe due to a reasons like that > > approach can easily extended to provide atomic visibility or the > > design is more robust, etc.) then it can lead to a lot of rework. > > Yeah, I have no objection to that plan but I think we also need to > keep in mind that (b), (c), and whatever we are thinking about global > consistency are talking about only PostgreSQL (and postgres_fdw). >
I think we should explore if those approaches could be extended for FDWs and if not then that could be considered as a disadvantage of that approach. -- With Regards, Amit Kapila. EnterpriseDB: http://www.enterprisedb.com
