Hi,
The commit message of 'user_catalog_table' says:
```
Replication solutions built around the logical decoding machinery
will likely need to set this operation for their configuration
tables; it might also be needed by extensions which perform table
access in their output functions.
```
So if there is an extension using the incorrect snapshot to scan user
catalog tables, it will get the wrong result, right?
--
Regards,
ChangAo Chen
