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https://issues.apache.org/jira/browse/SPARK-12011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15028378#comment-15028378
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Apache Spark commented on SPARK-12011:
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User 'yanboliang' has created a pull request for this issue:
https://github.com/apache/spark/pull/9994
> Stddev/Variance etc should support columnName as arguments
> ----------------------------------------------------------
>
> Key: SPARK-12011
> URL: https://issues.apache.org/jira/browse/SPARK-12011
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Yanbo Liang
>
> Spark SQL aggregate function
> stddev/stddev_pop/stddev_samp/variance/var_pop/var_samp/skewness/kurtosis/collect_list/collect_set
> should support columnName as arguments like other aggregate
> function(max/min/count/sum).
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