hql0312 commented on code in PR #3985:
URL: https://github.com/apache/flink-cdc/pull/3985#discussion_r2037010410


##########
flink-cdc-connect/flink-cdc-source-connectors/flink-connector-postgres-cdc/src/main/java/org/apache/flink/cdc/connectors/postgres/source/fetch/PostgresSourceFetchTaskContext.java:
##########
@@ -366,4 +381,15 @@ public String getPluginName() {
                         
sourceConfig.getDbzProperties().getProperty(PLUGIN_NAME.name()))
                 .getPostgresPluginName();
     }
+
+    private boolean isBackFillSplit(SourceSplitBase sourceSplitBase) {
+        if (sourceSplitBase instanceof StreamSplit) {
+            StreamSplit streamSplit = (StreamSplit) sourceSplitBase;
+            // when backfilled, will send specified table schema.
+            return 
!StreamSplit.STREAM_SPLIT_ID.equalsIgnoreCase(streamSplit.splitId())
+                    && streamSplit.getTableSchemas() != null

Review Comment:
   it can be simple, done. 
   @loserwang1024 



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