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https://issues.apache.org/jira/browse/SPARK-17844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15560966#comment-15560966
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Apache Spark commented on SPARK-17844:
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User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/15412
> DataFrame API should simplify defining frame boundaries without
> partitioning/ordering
> -------------------------------------------------------------------------------------
>
> Key: SPARK-17844
> URL: https://issues.apache.org/jira/browse/SPARK-17844
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
>
> When I was creating the example code for SPARK-10496, I realized it was
> pretty convoluted to define the frame boundaries for window functions when
> there is no partition column or ordering column. The reason is that we don't
> provide a way to create a WindowSpec directly with the frame boundaries. We
> can trivially improve this by adding rowsBetween and rangeBetween to Window
> object.
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