## 53.42. `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 54.17 for a more user-friendly view of this information.

Table 53.42. `pg_publication_rel` Columns

Column Type Description
`oid` `oid` Row identifier
`prpubid` `oid` (references `pg_publication`.`oid`) Reference to publication
`prrelid` `oid` (references `pg_class`.`oid`) Reference to relation
`prqual` `pg_node_tree` Expression tree (in `nodeToString()` representation) for the relation's publication qualifying condition. Null if there is no publication qualifying condition.
`prattrs` `int2vector` (references `pg_attribute`.`attnum`) This is an array of values that indicates which table columns are part of the publication. For example, a value of `1 3` would mean that the first and the third table columns are published. A null value indicates that all columns are published.