[cdc] Fixed when the order of the same field differs, it is considere…

…d a schema change. (apache#3314)

paimon-flink/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/sink/cdc/RichEventParser.java

@@ -45,14 +45,29 @@ public List<DataField> parseSchemaChange() {
                 .forEach(
                         dataField -> {
                             DataField previous = previousDataFields.get(dataField.name());
-                            if (!Objects.equals(previous, dataField)) {
+                            // When the order of the same field is different, its ID may also be
+                            // different,
+                            // so the comparison should not include the ID.
+                            if (!dataFieldEqualsIgnoreId(previous, dataField)) {
                                 previousDataFields.put(dataField.name(), dataField);
                                 change.add(dataField);
                             }
                         });
         return change;
     }
 
+    private boolean dataFieldEqualsIgnoreId(DataField dataField1, DataField dataField2) {
+        if (dataField1 == dataField2) {
+            return true;
+        } else if (dataField1 != null && dataField2 != null) {
+            return Objects.equals(dataField1.name(), dataField2.name())
+                    && Objects.equals(dataField1.type(), dataField2.type())
+                    && Objects.equals(dataField1.description(), dataField2.description());
+        } else {
+            return false;
+        }
+    }
+
     @Override
     public List<CdcRecord> parseRecords() {
         if (record.hasPayload()) {