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https://issues.apache.org/jira/browse/SPARK-23916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takuya Ueshin resolved SPARK-23916.
-----------------------------------
Resolution: Fixed
Fix Version/s: 2.4.0
Issue resolved by pull request 21011
[https://github.com/apache/spark/pull/21011]
> High-order function: array_join(x, delimiter, null_replacement) → varchar
> -------------------------------------------------------------------------
>
> Key: SPARK-23916
> URL: https://issues.apache.org/jira/browse/SPARK-23916
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Xiao Li
> Assignee: Marco Gaido
> Priority: Major
> Fix For: 2.4.0
>
>
> Ref: https://prestodb.io/docs/current/functions/array.html
> Concatenates the elements of the given array using the delimiter and an
> optional string to replace nulls.
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