davidradl commented on code in PR #26075:
URL: https://github.com/apache/flink/pull/26075#discussion_r1929023525


##########
flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/api/config/ExecutionConfigOptions.java:
##########
@@ -554,6 +554,16 @@ public class ExecutionConfigOptions {
                                             + "all changes to downstream just 
like when the mini-batch is "
                                             + "not enabled.");
 
+    @Documentation.TableOption(execMode = Documentation.ExecMode.STREAMING)
+    public static final ConfigOption<Integer> UNBOUNDED_OVER_VERSION =
+            ConfigOptions.key("table.exec.unbounded-over.version")
+                    .intType()
+                    .defaultValue(1)
+                    .withDescription(
+                            "Which version of the unbounded over aggregation 
to use: "
+                                    + " 1 - legacy version"
+                                    + " 2 - new version with improved 
performance");

Review Comment:
   If this goes into the first version 2 - should we default to 2? 



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