[jira] [Created] (FLINK-2237) Add hash-based Aggregation

[Shang Yuanchun (Jira)]

Rafiullah Momand created FLINK-2237:
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             Summary: Add hash-based Aggregation
                 Key: FLINK-2237
                 URL: https://issues.apache.org/jira/browse/FLINK-2237
             Project: Flink
          Issue Type: New Feature
            Reporter: Rafiullah Momand
            Priority: Minor
             Fix For: pre-apache


Aggregation functions at the moment are implemented in a sort-based way.
How can we implement hash based Aggregation for Flink?



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