Marco Gaido created HIVE-16878:
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Summary: Hive concatenation can generate corrupted ORC
Key: HIVE-16878
URL: https://issues.apache.org/jira/browse/HIVE-16878
Project: Hive
Issue Type: Bug
Components: ORC
Affects Versions: 1.2.1
Reporter: Marco Gaido
Hive concatenation generates corrupted (and therefore unreadable) ORC if there
are ORC files with different schema in the same table/partition.
This may happen, for instance, if you put some data in a table, then you add a
new column and you put some other data. In this case, running the ORC
concatenation leads to a corrupted ORC file.
I think that the right behavior would be not to concatenate ORC files with
different schema.
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