code: public Object execute(final Map<Object, Object> iArgs) {
      if (attribute == null)
        throw new OCommandExecutionException("Cannot execute the command because it has not been parsed yet");
  
      final ODatabaseRecord database = getDatabase();
      database.checkSecurity(ODatabaseSecurityResources.DATABASE, ORole.PERMISSION_UPDATE);
  
      ((ODatabaseComplex<?>) database).setInternal(attribute, value);
      return null;
    }
docs: Execute the ALTER DATABASE.