如何將FK約束放在mysql中的兩個表上，一個表使用InnoDB，另一個表使用MyISAM

Question

原因：liquibase.exception.JDBCException：

Error executing SQL ALTER TABLE `User` ADD CONSTRAINT `fk_user_location` FOREIGN KEY (`location_id`) REFERENCES `Location`(`id`) ON DELETE CASCADE:
          Caused By: Error executing SQL ALTER TABLE `UserLocation` ADD CONSTRAINT `fk_user_location_location_id` FOREIGN KEY (`location_id`) REFERENCES `Location`(`id`) ON DELETE CASCADE:
          Caused By: Can't create table 'usiapp_db.#sql-399a_177a7' (errno: 150)

Answer 1

你不能。 如果要為其創建外鍵或從中創建外鍵，則必須將MyISAM表轉換為InnoDB：

ALTER TABLE MyIsamTable ENGINE=InnoDB;

您可以動態地執行此操作，而無需關閉數據庫。