'Add a column expression to the list of result columns to be
returned.
Pending deprecation: :meth:`.add_column` will be superseded by
:meth:`.add_columns`.'

@util.pending_deprecation('0.7', ':meth:`.add_column`    is    superseded    by    :meth:`.add_columns`', False)
def add_column(self, column):

    return self.add_columns(column)
