Method _fetchone_impl

lib/sqlalchemy/engine/result.py:465–468

(
        self, hard_close: bool = False
    )

        raise NotImplementedError()

    def _fetchone_impl(
        self, hard_close: bool = False
    ) -> Optional[_InterimRowType[Row[Any]]]:
        raise NotImplementedError()

    def _fetchmany_impl(
        self, size: Optional[int] = None