lgbo-ustc commented on issue #7986: URL: https://github.com/apache/incubator-gluten/issues/7986#issuecomment-2485319462
q67的情况比较特殊。在使用全部的grouping keys进行聚合时，结果的行数和输入的行数基本一样。这就造成整体的效果和expand先执行的效果一样。因为两种方法需要在hash map中查找插入的数据量是一样的。  只有全部grouping keys的聚合结果能一定程度比输入的行数少时，才会有性能提升。 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
