private void listRealloc(int length) {
    Object[] array = new Object[length];
    if (this.array.length > 0) {
      System.arraycopy(this.array, 0, array, 0, this.array.length);
    }
    this.array = array;
  }
Row iterator for non-zero-length rows.
ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/FlatRowContainer.java