Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18113#discussion_r119147237
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/typedaggregators.scala
---
@@ -95,7 +93,123 @@ class TypedAverage[IN](val f: IN => Double) extends
Aggregator[IN, (Double, Long
// Java api support
def this(f: MapFunction[IN, java.lang.Double]) = this(x =>
f.call(x).asInstanceOf[Double])
+
def toColumnJava: TypedColumn[IN, java.lang.Double] = {
toColumn.asInstanceOf[TypedColumn[IN, java.lang.Double]]
}
}
+
+class TypedMinDouble[IN](val f: IN => Double)
+ extends Aggregator[IN, java.lang.Double, java.lang.Double] {
+
+ override def zero: java.lang.Double = null
--- End diff --
doesn't the `TypedSum` have the same problem?
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