Github user hequn8128 commented on a diff in the pull request:
https://github.com/apache/flink/pull/5555#discussion_r170577231
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/AggregationCodeGenerator.scala
---
@@ -105,11 +106,32 @@ class AggregationCodeGenerator(
// get unique function name
val funcName = newName(name)
+
+ // get distinct filter of acc fields for each aggregate functions
+ val distinctAccType = s"${classOf[DistinctAccumulator[_, _]].getName}"
+ val distinctAggType = s"${classOf[DistinctAggDelegateFunction[_,
_]].getName}"
+ val isDistinctAcc =
aggregates.map(_.isInstanceOf[DistinctAggDelegateFunction[_, _]])
+
// register UDAGGs
val aggs = aggregates.map(a => addReusableFunction(a, contextTerm))
+ // register real aggregate functions without distinct delegate
+ val realAggregates: Array[AggregateFunction[_ <: Any, _ <: Any]] =
aggregates.map {
+ case distinctAggDelegate: DistinctAggDelegateFunction[_, _] =>
+ distinctAggDelegate.realAgg
+ case agg: AggregateFunction[_, _] =>
+ agg
+ }
+
+ val realAggTypes = aggregates.map {
--- End diff --
Can be replaced by `realAggregates.map(_.getClass.getName)`
---
