Xiao Li created SPARK-23938:
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Summary: High-order function: map_zip_with(map<K, V1>, map<K, V2>,
function<K, V1, V2, V3>) → map<K, V3>
Key: SPARK-23938
URL: https://issues.apache.org/jira/browse/SPARK-23938
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
Merges the two given maps into a single map by applying function to the pair of
values with the same key. For keys only presented in one map, NULL will be
passed as the value for the missing key.
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