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https://issues.apache.org/jira/browse/FLINK-2237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15112857#comment-15112857
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ASF GitHub Bot commented on FLINK-2237:
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Github user zentol commented on the pull request:
https://github.com/apache/flink/pull/1517#issuecomment-174010704
No one got around to do it in an efficient/safe manner. There is a JIRA for
it afaik.
> 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
> Assignee: Gabor Gevay
> Priority: Minor
>
> 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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