Github user davies commented on the pull request:
https://github.com/apache/spark/pull/8988#issuecomment-146691882
Since we already have an option for being compatible with Hive (the legacy
mode), then we should not worry that (do not need to change anything in this
PR).
Hive 1.2 and Spark 1.4 will exists for a long time, If we plan to be
compatible with them out of box (without any configurations), then we can't
move forward.
Parquet format 2 will have the same issue (compatibility).
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