Re: min_safe_lsn column in pg_replication_slots view

On Fri, Jun 19, 2020 at 04:13:27PM +0900, Fujii Masao wrote:
> Agreed. But isn't it too late to remove the columns (i.e., change
> the catalog) for v13? Because v13 beta1 was already released.
> IIUC the catalog should not be changed since beta1 release so that
> users can upgrade PostgreSQL without initdb.

Catalog bumps have happened in the past between beta versions:
git log -p REL_12_BETA1..REL_12_BETA2 src/include/catalog/catversion.h
git log -p REL_11_BETA1..REL_11_BETA2 src/include/catalog/catversion.h
git log -p REL_10_BETA1..REL_10_BETA2 src/include/catalog/catversion.h

So we usually avoid to do that between betas, but my take here is that
a catalog bump is better than regretting a change we may have to live
with after the release is sealed.
--
Michael