:type column_name: str
        :type pos: int

        :rtype: bool

def has_column_at_position(self, column_name, pos=0):
        """
        :type column_name: str
        :type pos: int

        :rtype: bool
        """
        column_name = self._trim_quotes(column_name.lower())
        index_columns = [c.lower() for c in self.get_unquoted_columns()]

        return index_columns.index(column_name) == pos