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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2018/09/23 05:49:00 UTC
[jira] [Resolved] (SPARK-25512) Using RowNumbers in SparkR
Dataframe
[ https://issues.apache.org/jira/browse/SPARK-25512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon resolved SPARK-25512.
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Resolution: Invalid
Questions should go to mailing list (see https://spark.apache.org/community.html). Let's ask there first and file an issue when it's clear if it's an issue in Spark.
> Using RowNumbers in SparkR Dataframe
> ------------------------------------
>
> Key: SPARK-25512
> URL: https://issues.apache.org/jira/browse/SPARK-25512
> Project: Spark
> Issue Type: Question
> Components: SparkR
> Affects Versions: 2.3.1
> Reporter: Asif Khan
> Priority: Critical
>
> Hi,
> I have a use case , where I have a SparkR dataframe and i want to iterate over the dataframe in a for loop using the row numbers of the dataframe. Is it possible?
> Only solution I have now is to collect() the SparkR dataframe in R dataframe , which brings the entire dataframe on Driver node and then iterate over it using row numbers. But as the for loop executes only on driver node, I don't get the advantage of parallel processing in Spark which was the whole purpose of using Spark. Please Help.
> Thank You,
> Asif Khan
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