On Tue, Oct 11, 2022 at 05:43:03PM +0800, jiye wrote:
> As we know postgres using high level lock when do alter table or other ddl commands,
> It will block any dml operation, while it also will block by long term dml operation.
Most of the things can be already done in non-blocking (or almost
non-blocking way) if you just do it in a way that takes concurrency into
account.
Specifically - I have no problem adding/deleting columns.
Best regards,
depesz