Method Add

be/src/runtime/timestamp-value.cc:279–294

}

TimestampValue TimestampValue::Add(const boost::posix_time::time_duration& t) const {
  if (!IsValidTime(t) || !HasDateAndTime()) return TimestampValue();

  int64_t this_in_nano_sec = time_.total_nanoseconds();
  int64_t t_in_nano_sec = t.total_nanoseconds();

  if (this_in_nano_sec + t_in_nano_sec < NANOS_PER_DAY) {
    return TimestampValue(date_, time_ + t);
  } else {
    int64_t total_in_nano_sec = this_in_nano_sec + t_in_nano_sec;
    int64_t days = total_in_nano_sec / NANOS_PER_DAY;
    int64_t nano_secs_remaining = total_in_nano_sec % NANOS_PER_DAY;
    return TimestampValue(date_ + boost::gregorian::date_duration(days),
        boost::posix_time::time_duration(0, 0, 0, nano_secs_remaining));
  }
}

TimestampValue TimestampValue::Subtract(const boost::posix_time::time_duration& t) const {
  if (!IsValidTime(t) || !HasDateAndTime()) return TimestampValue();