public static Reader createReader(FileSystem fs,
                                    Path path) throws IOException {
    ReaderOptions opts = new ReaderOptions(new Configuration());
    opts.filesystem(fs);
    return new ReaderImpl(path, opts);
  }
Create an ORC file reader.
@param fs file system
@param path file name to read from
@return a new ORC file reader.
@throws IOException
ql/src/java/org/apache/hadoop/hive/ql/io/orc/OrcFile.java