Method DayOfWeek

be/src/exprs/date-functions-ir.cc:63–72

}

IntVal DateFunctions::DayOfWeek(FunctionContext* context, const DateVal& d_val) {
  if (d_val.is_null) return IntVal::null();
  DateValue dv = DateValue::FromDateVal(d_val);

  // DAYOFWEEK(DATE) sql function returns day-of-week in [1, 7] range, where 1 = Sunday.
  // dv.WeekDay() returns day-of-week in [0, 6] range. 0 = Monday and 6 = Sunday.
  int wday = dv.WeekDay();
  if (wday == -1) return IntVal::null();
  return IntVal((wday + 1) % 7 + 1);
}

IntVal DateFunctions::DayOfMonth(FunctionContext* context, const DateVal& d_val) {
  if (d_val.is_null) return IntVal::null();