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https://issues.apache.org/jira/browse/SPARK-32355?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-32355.
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Resolution: Incomplete
> 使用Structured Streaming窗口统计不能实现topN
> ----------------------------------
>
> Key: SPARK-32355
> URL: https://issues.apache.org/jira/browse/SPARK-32355
> Project: Spark
> Issue Type: IT Help
> Components: Java API
> Affects Versions: 2.4.0
> Reporter: Liu Jian
> Priority: Major
>
> {quote} 代码如下：
> Dataset<Row> result = ds.groupBy(functions.window(ds.col("_c1"), "1 minutes",
> "1 minutes"), ds.col("_c0")).agg(functions.first("_c2"),
> functions.last("_c2")).sort("_c1");
> 例如：_c1是数据时间，窗口统计之后还想根据时间排序，并取出第一条和最后一条，却实现不了! 感觉spark的Structured
> Streaming实现不了。请问这个需求怎么 实现呢？
> {quote}
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