[HIVE-13629] Expose Merge-File task and Column-Truncate task from DDLTask

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.1.0
• Component/s: Hive
• Target Version/s: 2.1.0
• Assignee: Zhihai Xu
• Reporter: Zhihai Xu
• Created: 27/Apr/16 20:22
• Updated: 21/Jun/16 15:10
• Resolved: 02/May/16 18:56

Description

DDLTask will create subtask in mergeFiles and truncateTable to support HiveOperation.TRUNCATETABLE, HiveOperation.ALTERTABLE_MERGEFILES and HiveOperation.ALTERPARTITION_MERGEFILES.
It will be better to expose the tasks which are created at function mergeFiles and truncateTable from class DDLTask to users.