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https://issues.apache.org/jira/browse/SPARK-27131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16791217#comment-16791217
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Hyukjin Kwon commented on SPARK-27131:
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Let's ask questions to mailing list. You could have a better and quicker
answer. (see https://spark.apache.org/community.html)
> Merge funciton in QuantileSummaries
> -----------------------------------
>
> Key: SPARK-27131
> URL: https://issues.apache.org/jira/browse/SPARK-27131
> Project: Spark
> Issue Type: Question
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Mingchao Tan
> Priority: Minor
>
> In QuantileSummaries.scala file, line 167
> This function merge two QuantileSummaries into one. You merge the two sampled
> array and then compress it. My question is when compressing the merged array,
> why you use count instead of the sum of count and other.count?
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