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https://issues.apache.org/jira/browse/SPARK-6763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208247#comment-15208247
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Stavros Kontopoulos commented on SPARK-6763:
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Is there a possibility to add a cardinality estimator as part of this work item
list... i could work on this...
http://research.google.com/pubs/pub40671.html
> CountMinSketch
> --------------
>
> Key: SPARK-6763
> URL: https://issues.apache.org/jira/browse/SPARK-6763
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 2.0.0
>
>
> Count-min sketch to estimate frequencies:
> http://en.wikipedia.org/wiki/Count%E2%80%93min_sketch
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