Liang-Chi Hsieh created SPARK-26085:
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             Summary: Key attribute of primitive type under typed aggregation 
should be named as "key" too
                 Key: SPARK-26085
                 URL: https://issues.apache.org/jira/browse/SPARK-26085
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Liang-Chi Hsieh


When doing typed aggregation on a Dataset, for complex key type, the key 
attribute is named as "key". But for primitive type, the key attribute is named 
as "value". This key attribute should also be named as "key" for primitive type.



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