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https://issues.apache.org/jira/browse/SPARK-9318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14945835#comment-14945835
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Hossein Falaki commented on SPARK-9318:
---------------------------------------
I agree with the issue being discussed. SparkR should have called this
signature of join:
{code}
def join(right: DataFrame, usingColumns: Seq[String]): DataFrame
{code}
This version of DataFrame.join makes sure only a single join column is
returned. Right now the join (and merge) behavior in SparkR is not what R users
expect.
> Add `merge` as synonym for join
> -------------------------------
>
> Key: SPARK-9318
> URL: https://issues.apache.org/jira/browse/SPARK-9318
> Project: Spark
> Issue Type: Sub-task
> Components: SparkR
> Reporter: Shivaram Venkataraman
> Assignee: Hossein Falaki
> Fix For: 1.5.0
>
>
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