@Override
    public Map<String, Object> parseSource(SchemaChangeEvent event) {
        return new HashMap<>();
    }
PostgresSchemaChangeEventHandler to deal Postgres's schema change event.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/postgres-cdc/src/main/java/org/apache/inlong/sort/cdc/postgres/source/handler/PostgresSchemaChangeEventHandler.java