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https://issues.apache.org/jira/browse/SPARK-20207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15956365#comment-15956365
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Sean Owen commented on SPARK-20207:
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That doesn't sound like a window then?
> Add ablity to exclude current row in WindowSpec
> -----------------------------------------------
>
> Key: SPARK-20207
> URL: https://issues.apache.org/jira/browse/SPARK-20207
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Mathew Wicks
> Priority: Minor
>
> It would be useful if we could implement a way to exclude the current row in
> WindowSpec. (We can currently only select ranges of rows/time.)
> Currently, users have to resort to ridiculous measures to exclude the current
> row from windowing aggregations.
> As seen here:
> http://stackoverflow.com/questions/43180723/spark-sql-excluding-the-current-row-in-partition-by-windowing-functions/43198839#43198839
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