Github user cloud-fan commented on the pull request:
https://github.com/apache/spark/pull/9226#issuecomment-150272837
The root case is: hive metastore is case insensitive and also not case
preserving.
We can lower case the field name that is used as partitioned column, to
make it consistent with hive metastore.
Or we can use table properties to store the partitioned column names, do
not trust hive metastore.
I choose the second approach in this PR, what do you think? @marmbrus
@yhuai
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