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https://issues.apache.org/jira/browse/SPARK-9427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14692777#comment-14692777
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Yu Ishikawa commented on SPARK-9427:
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[~shivaram] I don't figure out the number of each type. However, I estimated
them as folows. Please be careful that it includes the functions which have
been added into SparkR.
1 => 50
2 and 3 => 51
> Add expression functions in SparkR
> ----------------------------------
>
> Key: SPARK-9427
> URL: https://issues.apache.org/jira/browse/SPARK-9427
> Project: Spark
> Issue Type: New Feature
> Components: SparkR
> Reporter: Yu Ishikawa
>
> The list of functions to add is based on SQL's functions. And it would be
> better to add them in one shot PR.
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
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