ALTER TABLE `posts` ADD `change_id` BIGINT UNSIGNED NULL DEFAULT NULL AFTER `deleted`; CREATE TABLE `posts_changes` ( `id` bigint NOT NULL, `wall_id` bigint NOT NULL, `virtual_id` bigint NOT NULL, `newContent` longtext NOT NULL, `created` bigint NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci; ALTER TABLE `posts_changes` ADD PRIMARY KEY (`id`); ALTER TABLE `posts_changes` MODIFY `id` bigint NOT NULL AUTO_INCREMENT; COMMIT;