| From: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
|---|---|
| To: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
| Cc: | Josh Berkus <josh(at)berkus(dot)org>, Noah Misch <noah(at)leadboat(dot)com>, Petr Jelinek <petr(dot)jelinek(at)2ndquadrant(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, Vik Fearing <vik(at)2ndquadrant(dot)fr>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Quorum commit for multiple synchronous replication. |
| Date: | 2017-08-16 07:37:26 |
| Message-ID: | CAB7nPqTLG6ZeU-HzFqfT7XxJUp=mNf5HWK58JSR+itCgAexnkw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Aug 16, 2017 at 4:24 PM, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
> FWIW, in my opinion if tte current behavior of 'N(a,b)' could confuse
> users and we want to break the backward compatibility, I'd rather like
> to remove that style in PostgreSQL 10 and to raise an syntax error to
> user for more safety. Also, since the syntax 'a, b' might be opaque
> for new users who don't know the history of s_s_names syntax, we could
> unify its syntax to '[ANY|FIRST] N (a, b, ...)' syntax while keeping
> the '*'.
I find the removal of a syntax in release N for something introduced
in release (N - 1) a bit hard to swallow from the user prospective.
What about just issuing a warning instead and say that the use of
ANY/FIRST is recommended? It costs nothing in maintenance to keep it
around.
--
Michael
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