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https://issues.apache.org/jira/browse/SPARK-23936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takuya Ueshin resolved SPARK-23936.
-----------------------------------
Resolution: Fixed
Fix Version/s: 2.4.0
Issue resolved by pull request 21073
https://github.com/apache/spark/pull/21073
> High-order function: map_concat(map1<K, V>, map2<K, V>, ..., mapN<K, V>) →
> map<K,V>
> -----------------------------------------------------------------------------------
>
> Key: SPARK-23936
> URL: https://issues.apache.org/jira/browse/SPARK-23936
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Xiao Li
> Assignee: Bruce Robbins
> Priority: Major
> Fix For: 2.4.0
>
>
> Ref: https://prestodb.io/docs/current/functions/map.html
> Returns the union of all the given maps. If a key is found in multiple given
> maps, that key’s value in the resulting map comes from the last one of those
> maps.
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