Unused Request Handler table, meant presumably to record the delivery medium for a request.

Definition:

   Column   |  Type   | Collation | Nullable | Default

------------+---------+-----------+----------+---------

 request_id | numeric |           | not null |

 medium_id  | numeric |           | not null |

Indexes:

    "rh_requests_mediums_pkey" PRIMARY KEY, btree (request_id, medium_id)

Foreign-key constraints:

    "rh_requests_mediums_request_id_fkey" FOREIGN KEY (request_id) REFERENCES rh_requests(request_id)

    "rh_requests_mediums_rh_si_fk1" FOREIGN KEY (medium_id) REFERENCES rh_site_delivery_medium(medium_id)

Columns:

request_id: foreign key into rh_requests

medium_id: foreign key into rh_site_delivery_medium, which is not populated either