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https://issues.apache.org/jira/browse/FLINK-5434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15822251#comment-15822251
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Fabian Hueske commented on FLINK-5434:
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Hi [~gallenvara_bg], projection was not added to the Scala API on purpose. The
problem with project is that, it is not type-safe, i.e., the API cannot
automatically infer the result type of project. Moreover, projects are super
straightforward with Scala Lambda functions.
> Remove unsupported project() transformation from Scala DataStream docs
> ----------------------------------------------------------------------
>
> Key: FLINK-5434
> URL: https://issues.apache.org/jira/browse/FLINK-5434
> Project: Flink
> Issue Type: Bug
> Components: Documentation
> Reporter: Vasia Kalavri
>
> The Scala DataStream does not have a project() transformation, yet the docs
> include it as a supported operation.
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