Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/824#issuecomment-148584381
You need to add more tests to TestPartitionedTableRewriter.
At least the following cases should be tested.
* Without any filters
* With a filter which checks non-existing partition value
* With a filter which checks non-partition key columns
* Given a partition key of multiple columns,
* The case when a filter involves every partition key column
* The case when a filter involves some of partition key columns
* The case when a filter involves non-partition key columns
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