+COALESCE(peer_sites.site_ids, '{}') AS site_ids,
+COALESCE(peer_persons.person_ids, '{}') AS person_ids,
+COALESCE(peer_keys.key_ids, '{}') AS key_ids,
+COALESCE(peer_nodes.node_ids, '{}') AS node_ids,
+COALESCE(peer_slice_attribute_types.attribute_type_ids, '{}') AS attribute_type_ids,
+COALESCE(peer_slice_attributes.slice_attribute_ids, '{}') AS slice_attribute_ids,
+COALESCE(peer_slices.slice_ids, '{}') AS slice_ids