@Override
    protected TableIdentifier generateChangeStoreIdentifier(TableIdentifier baseIdentifier) {
      return TableIdentifier.of(
          baseIdentifier.namespace(),
          baseIdentifier.name() + CHANGE_STORE_SEPARATOR + MixedTable.CHANGE_STORE_IDENTIFIER);
    }
The change store will be created automatically by AMS when creating the base store, so we
just load change store from AMS
amoro-format-iceberg/src/main/java/org/apache/amoro/mixed/InternalMixedIcebergCatalog.java