Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/1439#issuecomment-49483743
I'll just add the the `HiveTableReader` vs `HiveTableScan` separation is
purely artificial, and the split is based on what code was stolen from Shark vs
what code was written for Spark SQL. It would be reasonable to combine them at
some point. However, for this PR it would be great to just fix the bug at hand.
If we are going to do major refactoring I'd want to see benchmarks showing
that we aren't introducing any performance regressions.
It would also be nice to see a test case that would be currently failing
but passes after this PR is added.
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