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https://issues.apache.org/jira/browse/SPARK-28600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-28600.
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Resolution: Duplicate
> the method agg of KeyValueGroupedDataset has 4 TypedColumn limits
> -------------------------------------------------------------------
>
> Key: SPARK-28600
> URL: https://issues.apache.org/jira/browse/SPARK-28600
> Project: Spark
> Issue Type: Question
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: Zhou Zach
> Priority: Minor
>
> why has the method agg of KeyValueGroupedDataset has 4 TypedColumn
> parameters limit?because performace?too much timing?in my case, it needs more
> than 4 agg metrics at the same time, so I only agg 4 metrics and join them by
> key, so the join waste time. so I wish the agg method had more than 4
> TypedColumn parameters
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