❯ mysqldef -h 127.0.0.1 -P33061 -uroot testdb --password=mysql --export
CREATE TABLE `user` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(191) DEFAULT 'k0kubun',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='this is comment';

❯ cat schema.sql
CREATE TABLE `user` (
  `id` bigint unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(191) DEFAULT 'k0kubun',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin;

❯ mysqldef -h 127.0.0.1 -P33061 -uroot testdb --password=mysql < schema.sql
-- Apply --
ALTER TABLE `user` COMMENT = ;
2025/01/23 10:34:06 Error 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

mysql> CREATE TABLE `user` (
    ->   `id` bigint unsigned NOT NULL AUTO_INCREMENT,
    ->   `name` varchar(191) DEFAULT 'k0kubun',
    ->   PRIMARY KEY (`id`)
    -> ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin;
Query OK, 0 rows affected (0.03 sec)