Xiao Li created SPARK-23936:
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Summary: 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
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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