absl::Status TruncateTime()

in sql_utils/public/functions/date_time_util.cc [3803:3851]

• 49 lines of code
• 18 McCabe index (conditional complexity)

absl::Status TruncateTime(const TimeValue& time, DateTimestampPart part,
                          TimeValue* output) {
  if (!time.IsValid()) {
    return MakeEvalError() << "Invalid time value: " << time.DebugString();
  }
  switch (part) {
    case HOUR:
      *output = TimeValue::FromHMSAndNanos(time.Hour(), 0, 0, 0);
      break;
    case MINUTE:
      *output = TimeValue::FromHMSAndNanos(time.Hour(), time.Minute(), 0, 0);
      break;
    case SECOND:
      *output = TimeValue::FromHMSAndNanos(time.Hour(), time.Minute(),
                                           time.Second(), 0);
      break;
    case MILLISECOND:
      *output = TimeValue::FromHMSAndNanos(
          time.Hour(), time.Minute(), time.Second(),
          time.Nanoseconds() / powers_of_ten[6] * powers_of_ten[6]);
      break;
    case MICROSECOND:
      *output = TimeValue::FromHMSAndNanos(
          time.Hour(), time.Minute(), time.Second(),
          time.Nanoseconds() / powers_of_ten[3] * powers_of_ten[3]);
      break;
    case NANOSECOND:
      *output = time;
      break;
    case YEAR:
    case MONTH:
    case DAY:
    case DAYOFWEEK:
    case DAYOFYEAR:
    case QUARTER:
    case DATE:
    case WEEK:
    case DATETIME:
    case TIME:
      return MakeEvalError()
             << "Unsupported DateTimestampPart " << DateTimestampPart_Name(part)
             << " for TIME_TRUNC";
    default:
      return MakeEvalError()
             << "Unexpected DateTimestampPart " << DateTimestampPart_Name(part)
             << " for TIME_TRUNC";
  }
  return absl::OkStatus();
}