@Override
    protected Table createChangeStore(
        TableIdentifier baseIdentifier,
        TableIdentifier changeIdentifier,
        Schema schema,
        PartitionSpec partitionSpec,
        PrimaryKeySpec keySpec,
        Map<String, String> properties) {
      return tableMetaStore.doAs(() -> icebergCatalog.loadTable(changeIdentifier));
    }
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