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https://issues.apache.org/jira/browse/SPARK-52515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17985731#comment-17985731
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Hudson commented on SPARK-52515:
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User 'yhuang-db' has created a pull request for this issue:
https://github.com/apache/spark/pull/51236
> Approx_top_k SQL function based on Apache DataSketches
> ------------------------------------------------------
>
> Key: SPARK-52515
> URL: https://issues.apache.org/jira/browse/SPARK-52515
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Yuchuan Huang
> Priority: Major
>
> Apache DataSketches an open-source library of sketches algorithms, and it is
> widely used and adopted in industry. This ticket aims to introduce a new
> function "approx_top_k", which uses the _frequent items sketches_ from Apache
> DataSketches to find the approximate k-most-frequent items in a dataset.
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