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https://issues.apache.org/jira/browse/SPARK-14352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412370#comment-16412370
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Walt Elder commented on SPARK-14352:
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Seems like this should be marked closed as of 2.2, right?
> approxQuantile should support multi columns
> -------------------------------------------
>
> Key: SPARK-14352
> URL: https://issues.apache.org/jira/browse/SPARK-14352
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: zhengruifeng
> Priority: Major
>
> It will be convenient and efficient to calculate quantiles of multi-columns
> with approxQuantile.
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