Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/5555#discussion_r182489141
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/AggregateUtil.scala
---
@@ -1439,7 +1467,47 @@ object AggregateUtil {
}
}
- (aggFieldIndexes, aggregates, accTypes, accSpecs)
+ // create distinct accumulator filter argument
+ val distinctAggs = new Array[Seq[DataViewSpec[_]]](aggregateCalls.size)
+
+ aggregateCalls.zipWithIndex.foreach {
+ case (aggCall, index) =>
+ if (aggCall.isDistinct) {
+ val argList: util.List[Integer] = aggCall.getArgList
+ // Only support single argument for distinct operation
+ if (argList.size() > 1) {
+ throw TableException(
+ "Cannot apply distinct filter on multiple input argument
fields at this moment!")
+ }
+ val relDataType =
aggregateInputType.getFieldList.get(argList.get(0)).getType
+ val fieldIndex = aggFieldIndexes(index)(0)
+ val mapViewTypeInfo = new MapViewTypeInfo(
+ FlinkTypeFactory.toTypeInfo(relDataType),
BasicTypeInfo.INT_TYPE_INFO)
--- End diff --
+1
---
