MySQL 8.0

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select version();


version()


8.0.30


CREATE TABLE `product` (
    `id` BINARY(16) NOT NULL,
    `version_id` BINARY(16) NOT NULL,
    `created_at` DATETIME(3) NOT NULL,
    `updated_at` DATETIME(3) NULL,
    PRIMARY KEY (`id`,`version_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


CREATE TABLE `faq` (
    `id` BINARY(16) NOT NULL,
    `question` VARCHAR(255) NULL,
    `answer` VARCHAR(255) NULL,
    `product_id` BINARY(16) not null,
    `created_at` DATETIME(3) NOT NULL,
    `updated_at` DATETIME(3) NULL,
    PRIMARY KEY (`id`),
    KEY `fk.faq.product_id` (`product_id`),
    CONSTRAINT `fk.faq.product_id` FOREIGN KEY (`product_id`) REFERENCES `product` (`id`) ON DELETE SET NULL ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

Column 'product_id' cannot be NOT NULL: needed in a foreign key constraint 'fk.faq.product_id' SET NULL


CREATE TABLE `faq` (
    `id` BINARY(16) NOT NULL,
    `question` VARCHAR(255) NULL,
    `answer` VARCHAR(255) NULL,
    `product_id` BINARY(16) ,
    `created_at` DATETIME(3) NOT NULL,
    `updated_at` DATETIME(3) NULL,
    PRIMARY KEY (`id`),
    KEY `fk.faq.product_id` (`product_id`),
    CONSTRAINT `fk.faq.product_id` FOREIGN KEY (`product_id`) REFERENCES `product` (`id`) ON DELETE SET NULL ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
SHOW CReate table faq;


Table
Create Table


faq
CREATE TABLE `faq` (
  `id` binary(16) NOT NULL,
  `question` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `answer` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `product_id` binary(16) DEFAULT NULL,
  `created_at` datetime(3) NOT NULL,
  `updated_at` datetime(3) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `fk.faq.product_id` (`product_id`),
  CONSTRAINT `fk.faq.product_id` FOREIGN KEY (`product_id`) REFERENCES `product` (`id`) ON DELETE SET NULL ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci