auto evaluation_res = txn.parameterized

                auto evaluation_res = txn.exec_params

                     "order by id desc limit 1")
                  (jobset.name.id)
                  .exec();

                     "order by id desc limit 1"
                    ,jobset.name.id
                    );

                auto unfinished_build_res = txn.parameterized

                auto unfinished_build_res = txn.exec_params

                     " limit 1")
                  (evaluation_id)
                  .exec();

                     " limit 1"
                    ,evaluation_id
                    );