title: Read Two Different ORC Schema File In Spark
body: <p>We are  saving our processing output to HDFC in ORC format. Now we have files with more than one schema and i want to read all files and create Dataset.</p>
  
  <p>One option is that i will write some job and convert all these files to single schema which i want to avoid bcz data is too big and it is one time solution if after some day schema will again change i have to regenerate all data</p>
  
  <p>My question is that is there any mechanism so that i can read these files
  let say i will supply higher schema while reading this and reader will automatically assign null value if some field is not present in any orc file.</p>