Github user twalthr commented on the pull request: https://github.com/apache/flink/pull/1127#issuecomment-140355813 Hi @chiwanpark, yes I think splitting it up makes sense. I just opened this PR to get some feedback and to show why my changes are necessary to integrate new input formats like HCatalog. You can ignore the `HCatTableSource` class as it is untested yet anyway.
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