@Override
  protected long getField(byte[] bytes, int start, int length) throws ParseException {
    try {
      return formatter.parse(Text.decode(bytes, start, length)).getEpochSecond();
    } catch (CharacterCodingException | RuntimeException e) {
      throw new ParseException(e.getMessage(), 0);
    }
  }
Return Unix Timestamp.
Extends {@link VectorUDFTimestampFieldString}
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/VectorUDFUnixTimeStampString.java