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https://issues.apache.org/jira/browse/SPARK-35622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen resolved SPARK-35622.
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Resolution: Won't Fix
> DataFrame's count function do not need groupBy and avoid shuffle
> ----------------------------------------------------------------
>
> Key: SPARK-35622
> URL: https://issues.apache.org/jira/browse/SPARK-35622
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.2
> Reporter: xiepengjie
> Priority: Major
>
> Use `df.rdd.count()` replace `df.count()`.
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