George Pachitariu created HIVE-21100:
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Summary: Allow flattening of table subdirectories resulted when
using TEZ engine and UNION clause
Key: HIVE-21100
URL: https://issues.apache.org/jira/browse/HIVE-21100
Project: Hive
Issue Type: Improvement
Reporter: George Pachitariu
Assignee: George Pachitariu
Right now, when writing data into a table with Tez engine and the clause UNION
ALL is the last step of the query, Hive on Tez will create a subdirectory for
each branch of the UNION ALL.
With this patch the subdirectories are removed, and the files are renamed and
moved to the parent directory.
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