title: delete hive partitioned external table but retain partitions
body: <p>When using external hive tables, is there a way where I can delete the data within the directory but retain the partitions via a query.  Please note I dont want to drop the table and recreate it.  I just want to empty the underlying folder and start a process all over again. My tables are large, with partitions by year, month, date and hour and it takes a lot of time to recreate partitions manually.</p>
  
  <p>Thanks</p>