Re: Skipping logical replication transactions on subscriber side

From: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
To: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>
Cc: "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, Alexey Lesovsky <lesovsky(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Skipping logical replication transactions on subscriber side
Date: 2021-08-02 03:21:06
Message-ID: CAA4eK1+2jU=1KSvYtWMq6zZcqKEi_dc8FO1iHDVwtMJWjnzr3g@mail.gmail.com
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On Mon, Aug 2, 2021 at 7:45 AM Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
>
> On Fri, Jul 30, 2021 at 12:52 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> >
> > On Thu, Jul 29, 2021 at 11:18 AM Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
> >
> > Setting up logical rep error context in a generic function looks a bit
> > odd to me. Do we really need to set up error context here? I
> > understand we can't do this in caller but anyway I think we are not
> > sending this to logical replication view as well, so not sure we need
> > to do it here.
>
> Yeah, I'm not convinced of this part yet. I wanted to show relid also
> in truncate cases but I came up with only this idea.
>
> If an error happens during truncating the table (in
> ExecuteTruncateGuts()), relid set by
> set_logicalrep_error_context_rel() is actually sent to the view. If we
> don’t have it, the view always shows relid as NULL in truncate cases.
> On the other hand, it doesn’t cover all cases. For example, it doesn’t
> cover an error that the target table doesn’t exist on the subscriber,
> which happens when opening the target table. Anyway, in most cases,
> even if relid is NULL, the error message in the view helps users to
> know which relation the error happened on. What do you think?
>

Yeah, I also think at this stage error message is sufficient in such cases.

--
With Regards,
Amit Kapila.

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