next_day function
Applies to: 
Databricks SQL Databricks Runtime
Returns the first date which is later than expr and named as in dayOfWeek.
Syntax
next_day(expr, dayOfWeek)
Arguments
expr: A DATE expression.dayOfWeek: A STRING expression identifying a day of the week.
Returns
A DATE.
dayOfWeek must be one of the following (case insensitive):
'SU','SUN','SUNDAY''MO','MON','MONDAY''TU','TUE','TUESDAY''WE','WED','WEDNESDAY''TH','THU','THURSDAY''FR','FRI','FRIDAY''SA','SAT','SATURDAY'
注記
In Databricks Runtime, if spark.sql.ansi.enabled is false, the function returns NULL instead of an error for a malformed dayOfWeek.
Examples
SQL
> SELECT next_day('2015-01-14', 'TU');
2015-01-20