ops.py 文件源码

def batch_drop_column(cls, operations, column_name):
        """Issue a "drop column" instruction using the current
        batch migration context.

        .. seealso::

            :meth:`.Operations.drop_column`

        """
        op = cls(
            operations.impl.table_name, column_name,
            schema=operations.impl.schema)
        return operations.invoke(op)