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https://issues.apache.org/jira/browse/FLINK-3219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15098850#comment-15098850
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ASF GitHub Bot commented on FLINK-3219:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1501#issuecomment-171778382
Thanks for fixing this, +1 from me as well.
Will merge this...
> Implement DataSet.count using a single operator
> -----------------------------------------------
>
> Key: FLINK-3219
> URL: https://issues.apache.org/jira/browse/FLINK-3219
> Project: Flink
> Issue Type: Improvement
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Priority: Minor
>
> {{DataSet.count}} is currently implemented using a {{FlatMapFunction}}
> followed by a {{DiscardingOutputFormat}}. As noted by [~StephanEwen] in
> [FLINK-2716] this can be done with only a {{RichOutputFormat}}.
> This change is also applicable to {{DataSet.collect}} and
> {{Utils.CollectHelper}}.
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