yihua commented on code in PR #9593:
URL: https://github.com/apache/hudi/pull/9593#discussion_r1330520029


##########
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/io/HoodieMergeHandle.java:
##########
@@ -346,7 +346,8 @@ public void write(HoodieRecord<T> oldRecord) {
       // writing the first record. So make a copy of the record to be merged
       HoodieRecord<T> newRecord = keyToNewRecords.get(key).newInstance();
       try {
-        Option<Pair<HoodieRecord, Schema>> mergeResult = 
recordMerger.merge(oldRecord, oldSchema, newRecord, newSchema, props);
+        Option<Pair<HoodieRecord, Schema>> mergeResult = recordMerger.merge(

Review Comment:
   I think we should just have one merge API and educate user how to implement 
it with custom logic.  More APIs (like in payload class) are just going to add 
more thinking overhead.



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