Fabian Hueske created FLINK-1509:
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Summary: Streaming Group Reduce Combiner
Key: FLINK-1509
URL: https://issues.apache.org/jira/browse/FLINK-1509
Project: Flink
Issue Type: New Feature
Components: Local Runtime, Optimizer
Reporter: Fabian Hueske
Priority: Minor
Combiners for GroupReduce operators are currently always (partially) sorting
their input even if the data is already appropriately sorted.
It should be relatively easy to add chained and unchained implementations of a
streaming group reduce combiner strategy .
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