Chaoyu Tang created HIVE-14626:
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             Summary: Support Trash in Truncate Table
                 Key: HIVE-14626
                 URL: https://issues.apache.org/jira/browse/HIVE-14626
             Project: Hive
          Issue Type: Sub-task
          Components: Query Processor
            Reporter: Chaoyu Tang
            Assignee: Chaoyu Tang
            Priority: Minor


Currently Truncate Table (or Partition) is implemented using FileSystem.delete 
and then recreate the directory, so
1. it does not support HDFS Trash
2. if the table/partition directory is initially encryption protected, after 
being deleted and recreated, it is no more protected.
The new implementation is to clean the contents of directory using 
multi-threaded trashFiles. If Trash is enabled and has a lower encryption level 
than the data directory, the files under it will be deleted. Otherwise, they 
will be Trashed



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