code: public Object execute(final Map<Object, Object> iArgs) {
      if (className == null)
        throw new OCommandExecutionException("Cannot execute the command because it has not been parsed yet");
  
      final ODatabaseRecord database = getDatabase();
      if (database.getMetadata().getSchema().existsClass(className))
        throw new OCommandExecutionException("Class " + className + " already exists");
  
      final OClassImpl sourceClass = (OClassImpl) ((OSchemaProxy) database.getMetadata().getSchema()).createClassInternal(className,
          superClass, clusterIds);
      sourceClass.saveInternal();
  
      if (superClass != null) {
        int[] clustersToIndex = superClass.getPolymorphicClusterIds();
        String[] clusterNames = new String[clustersToIndex.length];
        for (int i = 0; i < clustersToIndex.length; i++) {
          clusterNames[i] = database.getClusterNameById(clustersToIndex[i]);
        }
  
        for (OIndex<?> index : superClass.getIndexes())
          for (String clusterName : clusterNames)
            index.getInternal().addCluster(clusterName);
      }
  
      return database.getMetadata().getSchema().getClasses().size();
    }
docs: Execute the CREATE CLASS.