Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/5555#discussion_r182226785
--- 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!")
--- End diff --
Reword error message to `"DISTINCT aggregations with multiple parameters
not fully supported yet."`.
---
