Github user HyukjinKwon commented on the pull request: https://github.com/apache/spark/pull/9687#issuecomment-157561940 Several things to mention. Firstly, I wonder if it is okay to put `extractSourceRDDToDataFrame` at `QueryTest`. I did not put but I think the `extractSourceRDDToDataFrame` can be shared with `ParquetFilterSuite`. Secondly, I originally wanted to add `OrcFilterSuite` separately in order to test actual filter evaluation (using the enums in `ExpressionTree.Operator` and `PredicateLeaf.Operator` at hive); however, I decided not to do it here (I will do in a separate issue or followup PR) and just let the original test way work properly first.
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