Re: BUG #18644: ALTER PUBLICATION ... SET (publish_via_partition_root) wrong/undocumented behavior.

On Fri, Oct 4, 2024 at 7:38 PM Maxim Boguk <maxim(dot)boguk(at)gmail(dot)com> wrote:
>
> >>It would be useful if you can create a small test case to show the exact problem and what is your usecase for the same?
> Usecase - after initial load of logical replica I decided that on the
> replica I better split future data into weekly partitions due huge
> size (instead of monthly partitions on the master/publisher)
> exactly the case for "alter publication set (publish_via_partition_root)".
>
> My main issues with this case - there is no way to fix this problem if
> it happened less than reloading whole logical replication from blank.
>

You can prevent the problem by avoiding writes to the partitioned
tables between the Alter Pub and Alter Sub steps. One idea could be
that in a parallel session on publisher lock the parent table in
Access Exclusive mode till the Alter Sub command (with
copy_data=false) is finished.

--
With Regards,
Amit Kapila.