@Override
  public void init(CacheWriter cacheWriter, Configuration conf, Path path) throws IOException {
    this.orcWriter = super.createOrcWriter(cacheWriter, conf, path, destinationOi);
    this.cacheWriter = cacheWriter;
  }
The class that writes rows from a text reader to an ORC writer using VectorDeserializeRow.
llap-server/src/java/org/apache/hadoop/hive/llap/io/encoded/VectorDeserializeOrcWriter.java