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https://issues.apache.org/jira/browse/FLINK-2385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephan Ewen closed FLINK-2385.
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> Scala DataSet.distinct should have parenthesis
> ----------------------------------------------
>
> Key: FLINK-2385
> URL: https://issues.apache.org/jira/browse/FLINK-2385
> Project: Flink
> Issue Type: Bug
> Components: Scala API
> Affects Versions: 0.9
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Fix For: 0.10
>
>
> The method is not a side-effect free accessor, but defines heavy computation,
> even if it does not mutate the original data set.
> This is a somewhat API breaking change.
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