Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/1439#issuecomment-49341477
@chenghao-intel explained the root cause in
https://issues.apache.org/jira/browse/SPARK-2523. Basically, we should use
partition-specific `ObjectInspectors` to extract fields instead of using the
`ObjectInspectors` set in the `TableDesc`. If partitions of a table are using
different SerDe, their `ObjectInspector`s will be different. @chenghao-intel
can you add unit tests? Is there any Hive query test that can be included?
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