Dear Alvaro, Thanks for giving suggestion!
> A point on preserving physical replication slots: because we change WAL > format from one major version to the next (adding new messages or > changing format for other messages), we can't currently rely on physical > slots working across different major versions. > > So IMO, for now don't bother with physical replication slot > preservation, but do keep the option name as specific to logical slots. Based on the Julien's advice, We have already decided not to include physical slots in this patch and the option name has been changed. I think you said explicitly that we are going correct way. Thanks! Best Regards, Hayato Kuroda FUJITSU LIMITED
