cloud-fan commented on a change in pull request #25024: [SPARK-27296][SQL] User 
Defined Aggregators that do not ser/de on each input row
URL: https://github.com/apache/spark/pull/25024#discussion_r336882556
 
 

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 File path: sql/core/src/test/scala/org/apache/spark/sql/SQLContextSuite.scala
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 @@ -51,7 +51,7 @@ class SQLContextSuite extends SparkFunSuite with 
SharedSparkContext {
 
     // UDF should not be shared
     def myadd(a: Int, b: Int): Int = a + b
-    session1.udf.register[Int, Int, Int]("myadd", myadd)
+    session1.udf.register[Int, Int, Int]("myadd", myadd(_, _))
 
 Review comment:
   to make our life easier, how about we use `registerAggregator` as the new 
function name?  

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