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https://issues.apache.org/jira/browse/FLINK-2237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15137108#comment-15137108
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ASF GitHub Bot commented on FLINK-2237:
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Github user ggevay commented on the pull request:
https://github.com/apache/flink/pull/1517#issuecomment-181437507
I have added the strategy hint. At the moment, it defaults to sorting, but
I couldn't actually find any case where hashing is slower, and it is often
about 2 times faster.
> 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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