title: HIVE - ALTER TABLE my_table CLUSTERED BY (my_field) INTO 32 BUCKETS - apply retroactively?
body: <p>Is there a way to reorganize/reformat the data to be bucketed retroactively using the above statement?<br>
  Insertion being made after the ALTER statement are indeed being bucketed.. but I want the data to be changed backwards as well.</p>
  
  <p>From the manual:<br>
  "NOTE: These commands will only modify Hive's metadata, and will NOT reorganize or reformat existing data. Users should make sure the actual data layout conforms with the metadata definition."  </p>
  
  <p>How can I achieve it?</p>
  
  <p>Thanks</p>