Re: [HACKERS] multiple target of VACUUM command

On Thu, Aug 31, 2017 at 9:53 PM, Kyotaro HORIGUCHI
<horiguchi.kyotaro@lab.ntt.co.jp> wrote:
> I sometimes feel annoyed when trying to VACUUM multiple specific
> tables.
>
> postgres=# vacuum a, b;
> ERROR:  syntax error at or near ","
> LINE 1: vacuum a, b;
>
> This patch just allows multiple targets for VACUUM command.

There is a patch for the same feature by Nathan Bossart which is being
discussed already in this commit fest:
https://www.postgresql.org/message-id/E061A8E3-5E3D-494D-94F0-E8A9B312BBFC@amazon.com
It had already a couple of rounds of reviews, and is getting close to
something that could be committed. There is still a pending bug
related to the use of RangeVar though with autovacuum.

Your approach is missing a couple of points. For example when
specifying multiple targets, we have decided to check for an ERROR at
the beginning of VACUUM, but we are issuing a WARNING if it goes
missing in the middle of processing a list, so your set of patches
would provide a frustrating experience. We have also discussed about
reshaping a bit the API of vacuum(), so I would recommend looking at
what has been already proposed if you are interested.
-- 
Michael