guoliming created HIVE-10685:
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Summary: Alter table concatenate oparetor will cause duplicate data
Key: HIVE-10685
URL: https://issues.apache.org/jira/browse/HIVE-10685
Project: Hive
Issue Type: Bug
Reporter: guoliming
"Orders" table has 1500000000 rows and stored as ORC.
hive> select count(*) from orders;
OK
1500000000
Time taken: 37.692 seconds, Fetched: 1 row(s)
The table contain 14 files,the size of each file is about 2.1 ~ 3.2 GB.
After executing command : ALTER TABLE orders CONCATENATE;
The table is already 1530115000 rows.
My hive version is 1.1.0.
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