WencongLiu commented on code in PR #24398:
URL: https://github.com/apache/flink/pull/24398#discussion_r1510727272
##########
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/KeyedStream.java:
##########
@@ -1071,6 +1077,110 @@ protected SingleOutputStreamOperator<T>
aggregate(AggregationFunction<T> aggrega
return reduce(aggregate).name("Keyed Aggregation");
}
+ @Override
+ public PartitionWindowedStream<T> fullWindowPartition() {
+ throw new UnsupportedOperationException(
+ "KeyedStream doesn't support processing non-keyed
partitions.");
Review Comment:
After offline discussion, we all agree that a better version is "KeyedStream
doesn't support full window on partitions, if you want operations over
each-key, use methods in KeyedStream directly." In DataStream V1, the
KeyedStream doesn't have the concept "all records of same key is a partition".
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