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https://issues.apache.org/jira/browse/SPARK-20778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16013617#comment-16013617
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Sean Owen commented on SPARK-20778:
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This should just be a UDF. What's the argument that it needs to be a built-in?
> Implement array_intersect function
> ----------------------------------
>
> Key: SPARK-20778
> URL: https://issues.apache.org/jira/browse/SPARK-20778
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Eric Vandenberg
> Priority: Minor
>
> Implement an array_intersect function that takes array arguments and returns
> an array containing all elements of the first array that is common with the
> remaining arrays.
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