Xiao Li created SPARK-23914:
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Summary: High-order function: array_union(x, y) → array
Key: SPARK-23914
URL: https://issues.apache.org/jira/browse/SPARK-23914
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 2.3.0
Reporter: Xiao Li
Ref: https://prestodb.io/docs/current/functions/array.html
Returns an array of the elements in the union of x and y, without duplicates.
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