jiaan.geng created SPARK-37914:
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             Summary: Make RuntimeReplaceable works for AggregateFunction
                 Key: SPARK-37914
                 URL: https://issues.apache.org/jira/browse/SPARK-37914
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
    Affects Versions: 3.3.0
            Reporter: jiaan.geng


Currently, Spark provides RuntimeReplaceable to replace function with another 
function. The last function must be exists in build-in functions, so 
RuntimeReplaceable make Spark could reuse the implement of build-in function.
But RuntimeReplaceable not works for aggregate function.



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