Method UtcToUnixTimeMicros

be/src/runtime/timestamp-value.inline.h:131–150

Interpret 'this' as a timestamp in UTC and convert to unix time in microseconds. Nanoseconds are rounded to the nearest microsecond supported by Impala. Returns false if the conversion failed ('unix_time_micros' will be undefined), otherwise true.

/// false if the conversion failed ('unix_time_micros' will be undefined), otherwise
/// true.
inline bool TimestampValue::UtcToUnixTimeMicros(int64_t* unix_time_micros) const {
  const static int64_t MAX_UNIXTIME = 253402300799; // 9999-12-31 23:59:59
  const static int64_t MAX_UNIXTIME_MICROS =
      MAX_UNIXTIME * MICROS_PER_SEC + (MICROS_PER_SEC - 1);

  DCHECK(unix_time_micros != nullptr);
  time_t unixtime_seconds;
  if (UNLIKELY(!UtcToUnixTime(&unixtime_seconds))) return false;

  DCHECK(HasTime());
  *unix_time_micros =
    (static_cast<int64_t>(unixtime_seconds) * MICROS_PER_SEC) +
    ((time_.fractional_seconds() + (NANOS_PER_MICRO / 2)) / NANOS_PER_MICRO);

  // Rounding may result in the timestamp being MAX_UNIXTIME_MICROS+1 and should be
  // truncated.
  DCHECK_LE(*unix_time_micros, MAX_UNIXTIME_MICROS + 1);
  *unix_time_micros = std::min(MAX_UNIXTIME_MICROS, *unix_time_micros);
  return true;
}

inline bool TimestampValue::FloorUtcToUnixTimeMicros(int64_t* unix_time_micros) const {
  DCHECK(unix_time_micros != nullptr);