Re: [HACKERS] [Proposal] Allow users to specify multiple tables in VACUUM commands

Michael Paquier <michael.paquier@gmail.com> writes:
> On Thu, Sep 21, 2017 at 9:08 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Um ... so?  With Nathan's proposed behavior, there are two cases depending
>> on just when the unexpected schema change happens:
>> 1. *None* of the work gets done.
>> 2. The work before the troublesome relation gets done, and the work after
>> doesn't.

> You may be missing one which is closer to what autovacuum does:
> 3) Issue a warning for the troublesome relation, and get the work done
> a maximum.

Well, we could certainly discuss whether the behavior on detecting a
conflict ought to be "error" or "warning and continue".  But I do not buy
the value of "it might be one or the other depending on timing".
        regards, tom lane


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