'Consume the OFFSET clause.'

def __Offset(self):

    if self.__Accept('OFFSET'):
        if (self.__offset != (-1)):
            self.__Error('Offset    already    defined    in    LIMIT    clause')
        offset = self.__AcceptRegex(self.__number_regex)
        if offset:
            self.__offset = int(offset)
            if (self.__offset < 0):
                self.__Error('Bad    offset    in    OFFSET    clause')
            else:
                logging.log(LOG_LEVEL, 'Set    offset    to    %i', self.__offset)
        else:
            self.__Error('Non-number    offset    in    OFFSET    clause')
    return self.__Hint()
