def DbDeleteClassAttribute(self, argin):
        """ delete a class attribute and all its properties from database

        :param argin: Str[0] = Tango class name
        Str[1] = Attribute name
        :type: tango.DevVarStringArray
        :return:
        :rtype: tango.DevVoid """
        self._log.debug("In DbDeleteClassAttribute()")

        if len(argin) < 2:
            self.warn_stream("DataBase::db_delete_class_attribute(): insufficient number of arguments ")
            th_exc(DB_IncorrectArguments,
                   "insufficient number of arguments to delete class attribute",
                   "DataBase::DeleteClassAttribute()")

        klass_name, attr_name = argin[:2]

        self.db.delete_class_attribute(klass_name, attr_name)
delete a class attribute and all its properties from database

        :param argin: Str[0] = Tango class name
        Str[1] = Attribute name
        :type: tango.DevVarStringArray
        :return:
        :rtype: tango.DevVoid