@Override
  public void readBatch(int total, ColumnVector column, TypeInfo columnType) throws IOException {
    Arrays.fill(column.isNull, true);
    column.isRepeating = true;
    column.noNulls = false;
  }
A dummy vectorized parquet reader to support schema evolution.
ql/src/java/org/apache/hadoop/hive/ql/io/parquet/vector/VectorizedDummyColumnReader.java