@Override
  public void alterNamespace(String[] namespace, NamespaceChange... changes) {
    throw new UnsupportedOperationException("Cannot apply namespace change");
  }
Unified catalog implement for spark engine.
amoro-format-mixed/amoro-mixed-spark/amoro-mixed-spark-3-common/src/main/java/org/apache/amoro/spark/SparkUnifiedCatalogBase.java