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https://issues.apache.org/jira/browse/SPARK-17881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhenhua Wang closed SPARK-17881.
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Resolution: Duplicate
> Aggregation function for generating string histograms
> -----------------------------------------------------
>
> Key: SPARK-17881
> URL: https://issues.apache.org/jira/browse/SPARK-17881
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Zhenhua Wang
>
> This agg function generates equi-width histograms for string type columns,
> with a maximum number of histogram bins. It returns a empty result if the
> ndv(number of distinct value) of the column exceeds the maximum number
> allowed.
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