@Override
    protected Timestamp[] initializeFixedPointValues() {
      // TODO Auto-generated method stub
      return new Timestamp[] {
          new Timestamp(-29071),
          new Timestamp(-10669),
          new Timestamp(16558),
          new Timestamp(31808)
      };
    }
Base class for type specific batch generators. Each type specific batch generator implements
generateRandomNonNullValue to generate random values, and initializeFixedPointValues to
specify a set of fixed values within the data (this is useful when defining query predicates)
ql/src/test/org/apache/hadoop/hive/ql/exec/vector/util/OrcFileGenerator.java