Github user fhueske commented on the pull request: https://github.com/apache/flink/pull/907#issuecomment-121611605 Hi @jkovacs and @r-pogalz, thanks for this PR! It takes a while to review the changes because you are refactoring parts of the existing code (which is good IMO). Started reviewing the PR but I'm not done yet. I checked the restructuring of the existing MergeJoinIterators and everything is looking good so far. Nice work! I'll have a look at the new code (MergeOuterJoinIterators) in the next days.
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