Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/5241#discussion_r160268630
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/AggregateUtil.scala
---
@@ -1130,259 +1134,263 @@ object AggregateUtil {
// create aggregate function instances by function type and aggregate
field data type.
aggregateCalls.zipWithIndex.foreach { case (aggregateCall, index) =>
val argList: util.List[Integer] = aggregateCall.getArgList
- if (argList.isEmpty) {
- if
(aggregateCall.getAggregation.isInstanceOf[SqlCountAggFunction]) {
- aggFieldIndexes(index) = Array[Int](0)
- } else {
- throw new TableException("Aggregate fields should not be empty.")
+
+ if (aggregateCall.getAggregation.isInstanceOf[SqlCountAggFunction]) {
+ aggregates(index) = new CountAggFunction()
+ if(argList.isEmpty) {
--- End diff --
add space
---
