pg_publication_rel   The catalog pg_publication_rel contains the
   mapping between relations and publications in the database.  This is a
   many-to-many mapping.  See also Section 51.78
   for a more user-friendly view of this information.
  
Table 51.41. pg_publication_rel Columns
| Name | Type | References | Description | 
|---|---|---|---|
| prpubid | oid |  | Reference to publication | 
| prrelid | oid |  | Reference to relation |