[jira] [Created] (HIVE-9490) [Parquet] Support Alter Table/Partition Concatenate

[Dong Chen (JIRA)]

Dong Chen created HIVE-9490:
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             Summary: [Parquet] Support Alter Table/Partition Concatenate
                 Key: HIVE-9490
                 URL: https://issues.apache.org/jira/browse/HIVE-9490
             Project: Hive
          Issue Type: Sub-task
            Reporter: Dong Chen
            Assignee: Dong Chen


Parquet should support 
{{ALTER TABLE table_name \[PARTITION (partition_key = 'partition_value')\] 
CONCATENATE;}}

If the table or partition contains many small Parquet files, then the above 
command will merge them into larger files. The merge should happen at row group 
level thereby avoiding the overhead of decompressing and decoding the data. 
It is only supported by RCFiles or ORCFiles now.



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