On Fri, Jun 26, 2020 at 10:50 AM Masahiko Sawada
<masahiko.sawada@2ndquadrant.com> wrote:
>
> On Tue, 23 Jun 2020 at 13:26, Amit Kapila <amit.kapila16@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