void

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025      MONGOC_BULKWRITE_UPDATEONEOPTS_SET_UPSERT(3)

       If upsert is true, creates a new document if no document matches the query.

       The upsert option is not sent if this function is not called. The server's default value is false.

          void
          mongoc_bulkwrite_updateoneopts_set_upsert (mongoc_bulkwrite_updateoneopts_t *self, bool upsert);