@Override
  public long getLength() {
    long r = 0;
    if (inputSplits != null) {
      try {
        for (InputSplit inputSplit : inputSplits) {
          r += inputSplit.getLength();
        }
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
    return r;
  }
The position of the first byte in the file to process.
ql/src/java/org/apache/hadoop/hive/ql/io/BucketizedHiveInputSplit.java