Вы можете отключить в BigQuery, используя unnest()
и массивы:
select t.holiday, t.segment, el.dte, el.booking
from t cross join
unnest(array[struct('1/1/2020' as dte, "1/1/2020" as booking),
struct('1/2/2020' as dte, "1/2/2020" as booking),
. . .
]
) el;