Github user fhueske commented on the pull request:
https://github.com/apache/flink/pull/525#issuecomment-86400852
I updated the PR as discussed:
- GlobalProperties are filtered with the user-specified semantic properties.
- LocalProperties for are filtered with forward field info for key fields
only (sorting/grouping can only be preserved for key fields and is completely
destroyed for key-less operators such as AllReduce or MapPartition).
Documentation is adapted accordingly.
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