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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