[HIVE-14626] Support Trash in Truncate Table

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.3.0
• Component/s: Query Processor
• Assignee: Chaoyu Tang
• Reporter: Chaoyu Tang
• Created: 24/Aug/16 23:18
• Updated: 21/Jul/17 18:12
• Resolved: 09/Sep/16 01:24

Description

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