void

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025               MONGOC_COLLECTION_SET_READ_PREFS(3)

       Sets the default read preferences to use for operations on collection not specifying a read preference.

       The  global default is MONGOC_READ_PRIMARY: if the client is connected to a replica set it reads from the
       primary, otherwise it reads from the current MongoDB server.

       Please see the MongoDB website for a description of ReadPreferences.

       • collection: A mongoc_collection_t.

       • read_prefs: A mongoc_read_prefs_t.

          void
          mongoc_collection_set_read_prefs (mongoc_collection_t *collection,
                                            const mongoc_read_prefs_t *read_prefs);