Introduction Logical Replication is one of the many ways a Postgres database can replicate data to other Postgres database (a.k.a standby). Logical replication directly reads from the write-ahead log (WAL), recording every database change, avoiding the need to intercept queries or periodically read the table. These changes are filtered, serialized and then sent to the standby servers where they can be applied. While logical replication is intended to be used by Postgres databases to send and rec...