loserwang1024 commented on code in PR #4498:
URL: https://github.com/apache/flink-cdc/pull/4498#discussion_r3892706277
##########
flink-cdc-common/src/main/java/org/apache/flink/cdc/common/function/HashFunction.java:
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@@ -28,4 +28,14 @@
public interface HashFunction<T> {
int hashcode(T event);
+
+ /**
+ * Calculates the hash code with the upstream source subtask index.
+ *
+ * <p>Implementations that do not depend on the source subtask index can
continue implementing
+ * {@link #hashcode(Object)} only.
+ */
+ default int hashcode(int sourceIndex, T event) {
Review Comment:
done
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