## 52.40. `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 52.79](view-pg-publication-tables.html) for a more user-friendly view of this information.**Table 52.40. `pg_publication_rel` Columns**| Column Type<br/><br/> Description ||---------------------------------------------------------------------------------------------------------------------|| `oid``oid`<br/><br/> Row identifier ||`prpubid``oid` (references [`pg_publication`](catalog-pg-publication.html).`oid`)<br/><br/> Reference to publication|| `prrelid``oid` (references [`pg_class`](catalog-pg-class.html).`oid`)<br/><br/> Reference to relation |
