pg_replication_origin
   The pg_replication_origin catalog contains
   all replication origins created.  For more on replication origins
   see Chapter 50.
  
   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.
  
Table 52.43. pg_replication_origin Columns
| Name | Type | References | Description | 
|---|---|---|---|
| roident | Oid | A unique, cluster-wide identifier for the replication origin. Should never leave the system. | |
| roname | text | The external, user defined, name of a replication origin. |