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https://issues.apache.org/jira/browse/SPARK-26328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Li Jin resolved SPARK-26328.
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Resolution: Not A Problem
> Use GenerateOrdering for group key comparison in WindowExec
> -----------------------------------------------------------
>
> Key: SPARK-26328
> URL: https://issues.apache.org/jira/browse/SPARK-26328
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Li Jin
> Priority: Major
>
> Per discussion here:
> [https://github.com/apache/spark/pull/22305/commits/850541873df1101485a85632b85ba474dac67d56#r239312302]
> It seems better to use GenerateOrdering for group key comparison in
> WindowExec.
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