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From "Hyukjin Kwon (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-28600) the method agg of KeyValueGroupedDataset has 4 TypedColumn limits
Date Fri, 02 Aug 2019 10:25:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-28600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hyukjin Kwon resolved SPARK-28600.
----------------------------------
    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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