global class DNUpsertSchedule implements Schedulable {

    global void execute(SchedulableContext SC) {
        Id execBTId = Database.executeBatch(new DNUpsertBatch(), 1);
    }

    public static void assignOneMinute() {
        // delete 実行済み
        for (CronTrigger ct :
                [SELECT Id FROM CronTrigger WHERE CronJobDetail.Name like 'DNUpsert%']) {
            System.abortJob(ct.id);
        }
        Datetime addOneM = System.now().addMinutes(1);
        String CRON_EXP = '0 ' + addOneM.minute() + ' ' + addOneM.hour() + ' ' + addOneM.day() + ' ' + addOneM.month() + ' ? ' + addOneM.year();
        List<CronTrigger> oldcron = [select Id from CronTrigger where State = 'WAITING' and CronJobDetail.Name like 'DNUpsert%'];
        
        if (oldcron.size() == 0) {
            System.schedule('DNUpsert' + CRON_EXP, CRON_EXP, new DNUpsertSchedule());
        }
        
    }
}