text: # 結合のため、jstに直さない
  SELECT 
      reserve_tb.checkin_date,
      holiday_mst_tb.holidayday_flg,
      holiday_mst_tb.nextday_is_holiday_flg
  FROM 
      `awesome-preprocessing.work.reserve_tb` AS reserve_tb
  INNER JOIN # 別にJOINでも可
      `awesome-preprocessing.work.holiday_mst_tb` AS holiday_mst_tb
          ON holiday_mst_tb.target_day = reserve_tb.checkin_date
  