Re: Proposal: Conflict log history table for Logical Replication

On Fri, Dec 5, 2025 at 3:25 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Thu, Dec 4, 2025 at 4:20 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> >
> > Also, shall we give the option to the user where she wants to see
> > conflict/resolution information? One idea to achieve the same is to
> > provide subscription options like (a) conflict_resolution_format, the
> > values could be log and table for now, in future, one could extend it
> > to other options like xml, json, etc. (b) conflict_log_table: in this
> > user can specify the conflict table name, this can be optional such
> > that if user omits this and conflict_resolution_format is table, then
> > we will use internally generated table name like
> > pg_conflicts_<subscription_id>.
> >
>
> In this idea, we can keep the name of the second option as
> conflict_log_name instead of conflict_log_table. This can help us LOG
> the conflicts in a totally separate conflict file instead of in server
> log. Say, the user provides conflict_resolution_format as 'log' and
> conflict_log_name as 'conflict_report' then we can report conflicts in
> this separate file by appending subid to distinguish it. And, if the
> user gives only the first option conflict_resolution_format as 'log'
> then we can keep reporting the information in server log files.

Yeah that looks good, so considering the extensibility I think we can
keep the option name as 'conflict_log_name' from the first version
itself even if we don't provide all the options in the first version.

--
Regards,
Dilip Kumar
Google