Github user fhueske commented on the pull request:
https://github.com/apache/flink/pull/1776#issuecomment-194786495
Thanks @gallenvara for opening the PR. Looks mostly good but the tests need
to be improved, IMO.
It would also be good to extend the `DataDistribution` interface by adding
a method `TypeInformation[] getKeyTypes()`. This will allow us to validate the
key types of the `DataDistribution` and the specified keys in the
`PartitionOperator`.
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