>>> import datetime
>>> df = session.create_dataframe([
... (datetime.date.fromisoformat("2020-08-01"), "mo"),
... (datetime.date.fromisoformat("2020-12-01"), "we"),
... ], schema=["a", "b"])
>>> df.select(next_day("a", col("b"))).collect()
[Row(NEXT_DAY("A", "B")=datetime.date(2020, 8, 3)), Row(NEXT_DAY("A", "B")=datetime.date(2020, 12, 2))]
>>> df.select(next_day("a", "fr")).collect()
[Row(NEXT_DAY("A", 'FR')=datetime.date(2020, 8, 7)), Row(NEXT_DAY("A", 'FR')=datetime.date(2020, 12, 4))]