Re: Why ALTER SUBSCRIPTION ... SET (slot_name='none') requires subscription disabled?

On Fri, Jul 9, 2021 at 8:20 AM Japin Li <japinli(at)hotmail(dot)com> wrote:
>
> On Thu, 08 Jul 2021 at 18:17, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > On Thu, Jul 8, 2021 at 3:43 PM Japin Li <japinli(at)hotmail(dot)com> wrote:
>
> Please consider review v3 patch. v3-0001 adds slot_name verification in
> parse_subscription_options() and comments for why we need disable subscription
> where set slot_name to NONE.
>

I think we back-patch this bug-fix till v10 where it was introduced
and update the comments only in HEAD. So, accordingly, I moved the
changes into two patches and changed the comments a bit. Can you
please test the first patch in back-branches? I'll also do it
separately.

> v3-0002 comes from Ranier Vilela, it reduce the
> overhead strlen in ReplicationSlotValidateName().
>

I think this patch has nothing to do with this bug-fix, so I suggest
you discuss this in a separate patch. Personally, I don't think it
will help in reducing any overhead but there doesn't appear to be any
harm in changing it as proposed.

--
With Regards,
Amit Kapila.