Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3809#discussion_r114502444
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/aggregations.scala
---
@@ -130,3 +142,63 @@ case class Avg(child: Expression) extends Aggregation {
new SqlAvgAggFunction(AVG)
}
}
+
+case class UDAGGFunctionCall(
+ aggregateFunction: AggregateFunction[_, _],
+ args: Seq[Expression])
+ extends Aggregation {
+
+ override private[flink] def children: Seq[Expression] = args
+
+ // Override makeCopy method in TreeNode, to produce vargars properly
--- End diff --
`vargars` -> `varargs`
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