Parser syntax error for comment with DEFAULT (_utf8mb3'')

## Enhancement
```
CREATE TABLE `tb` (
`id` char(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
`created_by` varchar(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL,
`date_created` datetime(6) DEFAULT NULL,
`date_updated` datetime(6) NOT NULL,
`comment` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL DEFAULT (_utf8mb3''),
`updated_by` varchar(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC
```
This SQL cannot be parsed by the parser.