Attempt to load the statistic from the database.
        :return: Number of entries for the statistic

def get_rows(self):
        """
        Attempt to load the statistic from the database.
        :return: Number of entries for the statistic
        """
        rows = []
        if check_table_exists(self.tracker.dbcon_master, self.name):
            rows.extend(get_rows(self.tracker.dbcon_master, self.name))
        if self.tracker.dbcon_part and check_table_exists(self.tracker.dbcon_part, self.name):
            rows.extend(get_rows(self.tracker.dbcon_part, self.name))
        return rows