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https://issues.apache.org/jira/browse/SPARK-19399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15869067#comment-15869067
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Apache Spark commented on SPARK-19399:
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User 'felixcheung' has created a pull request for this issue:
https://github.com/apache/spark/pull/16950
> R Coalesce on DataFrame and coalesce on column
> ----------------------------------------------
>
> Key: SPARK-19399
> URL: https://issues.apache.org/jira/browse/SPARK-19399
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Affects Versions: 2.1.0
> Reporter: Felix Cheung
> Assignee: Felix Cheung
> Fix For: 2.1.1, 2.2.0
>
>
> coalesce on DataFrame is different from repartition, where shuffling is
> avoided. We should have that in SparkR.
> coalesce on Column is convenient to have in expression.
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