Vectorization: Date/Timestamp NULL issues

Wrong results found for:
date_add/date_sub

UT areas:
date_add/date_sub

datediff

to_date

interval_year_month + interval_year_month
interval_day_time + interval_day_time
interval_day_time + timestamp
timestamp + interval_day_time
date + interval_day_time
interval_day_time + date
interval_year_month + date
date + interval_year_month
interval_year_month + interval_year_month
timestamp + interval_year_month

date - date
interval_year_month - interval_year_month
interval_day_time - interval_day_time
timestamp - interval_day_time
timestamp - timestamp
date - timestamp
timestamp - date
date - interval_day_time
date - interval_year_month
timestamp - interval_year_month