Re: min_safe_lsn column in pg_replication_slots view

On 2020/06/19 16:43, Kyotaro Horiguchi wrote:
> At Fri, 19 Jun 2020 16:36:09 +0900, Michael Paquier <michael(at)paquier(dot)xyz> wrote in
>> 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.

Sounds reasonable.

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION