## 52.40. `pg_publication_rel`

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 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        |