@Override
    public boolean accept(Path p) {
      String name = p.getName();
      return !name.startsWith("_") && !name.startsWith(".");
    }
Post exec hook to print orc file dump for files that will be read by fetch task. The file dump
output will be printed before fetch task output. It also prints the row index for the 1st column
in the file just to verify the impact of bloom filter fpp.
ql/src/java/org/apache/hadoop/hive/ql/hooks/PostExecOrcFileDump.java