pg_replication_origin catalog contains all replication origins created. For more on replication origins see Chapter 49.
Unlike most system catalogs,
pg_replication_origin is shared across all databases of a cluster: there is only one copy of
pg_replication_origin per cluster, not one per database.
A unique, cluster-wide identifier for the replication origin. Should never leave the system.
The external, user defined, name of a replication origin.