ALTER TABLE `bbs_post`
MODIFY COLUMN `message` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL AFTER `quotepid`,
MODIFY COLUMN `message_fmt` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL AFTER `message`;
ALTER TABLE `bbs_thread`
MODIFY COLUMN `subject` char(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '' AFTER `userip`;
ALTER TABLE `bbs_notice`
MODIFY COLUMN `message` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL AFTER `type`;
ALTER TABLE `bbs_modlog`
MODIFY COLUMN `subject` char(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '' AFTER `pid`,
MODIFY COLUMN `comment` char(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '' AFTER `subject`;