operations.py 文件源码

def create_primary_key(self, name, cols):
        """Issue a "create primary key" instruction using the
        current batch migration context.

        The batch form of this call omits the ``table_name`` and ``schema``
        arguments from the call.

        .. seealso::

            :meth:`.Operations.create_primary_key`

        """
        raise NotImplementedError("not yet implemented")