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https://issues.apache.org/jira/browse/SPARK-13457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159123#comment-15159123
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Apache Spark commented on SPARK-13457:
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User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/11323
> Remove DataFrame RDD operations
> -------------------------------
>
> Key: SPARK-13457
> URL: https://issues.apache.org/jira/browse/SPARK-13457
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
>
> We'd like to remove DataFrame RDD operations like {{map}}, {{filter}}, and
> {{foreach}} because:
> # After making DataFrame a subclass of {{Dataset\[Row\]}}, these methods
> conflicts with methods in Dataset.
> # By returning RDDs, they are semantically improper.
> It's trivial to remove them since they simply delegates to methods of
> {{DataFrame.rdd}}.
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