@Override
  public boolean tableExists(Identifier ident) {
    return unifiedCatalog.tableExists(namespaceToDatabase(ident.namespace()), ident.name());
  }
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