@SuppressFBWarnings(value = "EI_EXPOSE_REP", justification = "Expose internal rep for efficiency")
  public Timestamp getScratchTimestamp() {
    return scratchTimestamp;
  }
Return the scratch timestamp (contents undefined).
@return
storage-api/src/java/org/apache/hadoop/hive/ql/exec/vector/TimestampColumnVector.java