`show create table` and `show tables` should not work

[timsehn]

Why we taunting Postgres users?

employees=> show create table employees;
   Table   |                           Create Table                           
-----------+------------------------------------------------------------------
 employees | CREATE TABLE `employees` (                                      +
           |   `id` int NOT NULL,                                            +
           |   `last_name` varchar(255),                                     +
           |   `first_name` varchar(255),                                    +
           |   `start_date` date,                                            +
           |   PRIMARY KEY (`id`)                                            +
           | ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_bin