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From "Zhou Zach (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-28600) the method agg of KeyValueGroupedDataset has 4 TypedColumn limits
Date Fri, 02 Aug 2019 04:29:00 GMT
Zhou Zach created SPARK-28600:
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             Summary:  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


 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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