環境 mysql> select version(); +--------------+ | version() | +--------------+ | 8.0.28-debug | +--------------+ 1 row in set (0.00 sec) mysql> show create table child\G *************************** 1. row *************************** Table: child Create Table: CREATE TABLE `child` ( `id` int NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci 1 row in set (0