MariaDB [test]> CREATE TABLE `ab``c` (t1_id int PRIMARY KEY, t1_val varchar(10));

MariaDB [test]> show create table `ab``c`;

+-------+-------------------------------------------------------------------------------------------+

| Table | Create Table                                                                              |

+-------+-------------------------------------------------------------------------------------------+

| ab`c  | CREATE TABLE `ab``c` (

  `i` int(11) DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 |

+-------+-------------------------------------------------------------------------------------------+

1 row in set (0.000 sec)

MariaDB [test]> call sys.table_exists('test', '`ab``c`',@type);

ERROR 1103 (42000): Incorrect table name ''

MariaDB [test]> call sys.table_exists('test','ab`c', @ext);

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '` (id INT PRIMARY KEY)' at line 1