public float getProgress() throws IOException {
    if (end == start) {
      return 0.0f;
    } else {
      return Math.min(1.0f, (in.getPosition() - start) / (float) (end - start));
    }
  }
Return the progress within the input split.

@return 0.0 to 1.0 of the input byte range
ql/src/java/org/apache/hadoop/hive/ql/io/RCFileRecordReader.java