wwj6591812 commented on code in PR #4535:
URL: https://github.com/apache/paimon/pull/4535#discussion_r1845802960


##########
paimon-flink/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/sink/cdc/UpdatedDataFieldsProcessFunction.java:
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@@ -37,25 +46,65 @@
  * be 1.
  */
 public class UpdatedDataFieldsProcessFunction
-        extends UpdatedDataFieldsProcessFunctionBase<List<DataField>, Void> {
+        extends UpdatedDataFieldsProcessFunctionBase<List<DataField>, Void>
+        implements CheckpointedFunction {
 
     private final SchemaManager schemaManager;
 
     private final Identifier identifier;
 
+    private ListState<DataField> latestSchemaListState;
+    private List<DataField> latestSchemaList;

Review Comment:
   I mean latestSchemaList 'latestSchemaList' may be 'final', not 
latestSchemaListState.



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