fix:登录错误尝试修改
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-- 已核查数据的精确修复，兼容 MySQL 5.7 / 8.0。
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-- 只读核查时间：2026-11-05 15:46:31（北京时间），数据库 chat_v1。
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-- 当时仅一组重复：member_id=64，VIP(type=4)，有效记录 id=210、211。
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-- member_user.id=64 已逻辑删除；本脚本不修改、不恢复用户。
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-- 保留210，仅逻辑删除211。不清理其他标签，不执行全库去重或 ALTER。
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--
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-- 使用方法：在 chat_v1 的独立会话中执行整份脚本（会话不可有未提交事务）。
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-- 默认 @apply_tag_repair=0：锁定并核验后回滚，仅预演；不创建备份表。
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-- 预演返回 PREVIEW_OK 后，把下行改成1，重新执行整份脚本才真正修复。
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-- 正式修复自动备份两行；字段/数量/用户状态变化，或备份已存在，均报错回滚。
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-- 请在低流量时执行，并暂停该用户的标签编辑，避免长时间锁等待。
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-- 正式执行失败可能留下空备份表，须人工核查；脚本不会复用或覆盖任何同名表。
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SET NAMES utf8mb4;
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SET @apply_tag_repair = 0;
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DELIMITER $$
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DROP PROCEDURE IF EXISTS codex_repair_member_tag_211_20261105$$
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CREATE PROCEDURE codex_repair_member_tag_211_20261105(IN p_apply TINYINT)
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BEGIN
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DECLARE v_count INT DEFAULT 0;
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DECLARE v_active_count INT DEFAULT 0;
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DECLARE v_changed INT DEFAULT 0;
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DECLARE EXIT HANDLER FOR SQLEXCEPTION
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BEGIN
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ROLLBACK;
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RESIGNAL;
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END;
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IF DATABASE() <> 'chat_v1' OR DATABASE() IS NULL THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Wrong database: expected chat_v1';
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END IF;
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IF p_apply IS NULL OR p_apply NOT IN (0, 1) THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'p_apply must be 0 (preview) or 1 (apply)';
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END IF;
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SELECT COUNT(*) INTO v_count
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FROM information_schema.TABLES
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME IN ('member_user', 'member_recent_tag') AND ENGINE = 'InnoDB';
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IF v_count <> 2 THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Both business tables must use InnoDB';
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END IF;
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-- DDL必须放在修复事务之前。仅创建独立备份表，不改业务表结构。
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-- 明确列定义，避免复制业务表未来的生成列/唯一索引而妨碍备份重复记录。
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IF p_apply = 1 THEN
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CREATE TABLE member_recent_tag_backup_20261105_64 (
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id BIGINT NOT NULL,
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member_id BIGINT NOT NULL,
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tag_title VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
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tag_biz_id BIGINT NULL,
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tag_biz_type CHAR(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL,
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creator VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL,
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create_time DATETIME NOT NULL,
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updater VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL,
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update_time DATETIME NOT NULL,
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deleted BIT(1) NOT NULL,
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tenant_id BIGINT NULL,
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PRIMARY KEY (id)
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) ENGINE=InnoDB COMMENT='20261105用户64重复VIP标签修复前原始记录';
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END IF;
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-- 显式使用RR范围锁，避免会话处于READ COMMITTED时漏锁新插入的第三条记录。
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SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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START TRANSACTION;
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-- 当前读并锁住用户及该组标签。无相关索引时可能锁住较多行，应整段及时执行。
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SELECT id, deleted + 0 AS user_deleted
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FROM member_user WHERE id = 64 FOR UPDATE;
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SELECT id, member_id, tag_biz_type, tag_title, tag_biz_id, tenant_id,
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creator, create_time, updater, update_time, deleted + 0 AS deleted
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FROM member_recent_tag
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WHERE member_id = 64 AND tag_biz_type = '4'
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ORDER BY id FOR UPDATE;
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SELECT COUNT(*) INTO v_count
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FROM member_user WHERE id = 64 AND deleted = b'1';
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IF v_count <> 1 THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'User state changed; inspect again';
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END IF;
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SELECT COUNT(*) INTO v_active_count
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FROM member_recent_tag
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WHERE member_id = 64 AND tag_biz_type = '4' AND deleted = b'0';
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SELECT COUNT(*) INTO v_count
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FROM member_recent_tag
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WHERE id IN (210, 211)
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AND member_id = 64
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AND BINARY tag_biz_type = BINARY '4'
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AND BINARY tag_title = BINARY 'VIP用户'
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AND tag_biz_id IS NULL
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AND tenant_id <=> 1
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AND BINARY creator <=> BINARY '1'
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AND BINARY updater <=> BINARY '1'
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AND create_time = '2026-07-31 18:30:28'
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AND update_time = '2026-07-31 18:30:28'
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AND deleted = b'0';
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IF v_active_count <> 2 OR v_count <> 2 THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Tag snapshot changed or already repaired; inspect again';
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END IF;
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IF p_apply = 0 THEN
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ROLLBACK;
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SELECT 'PREVIEW_OK' AS result, 210 AS keep_tag_id, 211 AS delete_tag_id,
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1 AS expected_changed_rows, 'No data changed' AS message;
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ELSE
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-- 不使用 IGNORE / REPLACE：备份冲突时必须停止，不能覆盖原备份。
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INSERT INTO member_recent_tag_backup_20261105_64
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(id, member_id, tag_title, tag_biz_id, tag_biz_type, creator,
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create_time, updater, update_time, deleted, tenant_id)
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SELECT id, member_id, tag_title, tag_biz_id, tag_biz_type, creator,
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create_time, updater, update_time, deleted, tenant_id
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FROM member_recent_tag WHERE id IN (210, 211);
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SET v_count = ROW_COUNT();
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IF v_count <> 2 THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Backup must contain exactly two rows';
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END IF;
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UPDATE member_recent_tag
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SET deleted = b'1', update_time = CURRENT_TIMESTAMP
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WHERE id = 211 AND member_id = 64 AND tag_biz_type = '4' AND deleted = b'0';
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SET v_changed = ROW_COUNT();
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IF v_changed <> 1 THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Repair must change exactly one row';
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END IF;
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SELECT COUNT(*) INTO v_count
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FROM member_recent_tag
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WHERE (id = 210 AND deleted = b'0') OR (id = 211 AND deleted = b'1');
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SELECT COUNT(*) INTO v_active_count
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FROM member_recent_tag
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WHERE member_id = 64 AND tag_biz_type = '4' AND deleted = b'0';
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IF v_count <> 2 OR v_active_count <> 1 THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Post-repair validation failed';
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END IF;
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COMMIT;
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SELECT 'REPAIRED' AS result, v_changed AS changed_rows,
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'member_recent_tag_backup_20261105_64' AS backup_table;
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END IF;
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END$$
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DELIMITER ;
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CALL codex_repair_member_tag_211_20261105(@apply_tag_repair);
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DROP PROCEDURE codex_repair_member_tag_211_20261105;
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-- 全库复核：正式修复后预期0行。预演则仍返回原来的一组。
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SELECT member_id, tag_biz_type, COUNT(*) AS active_count,
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GROUP_CONCAT(id ORDER BY id) AS active_tag_ids
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FROM member_recent_tag
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WHERE deleted = b'0'
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GROUP BY member_id, tag_biz_type
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HAVING COUNT(*) > 1;
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-- 本脚本没有安装唯一约束；防止新增重复仍需后端修复及独立的唯一索引迁移。
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-- 如需撤销，先核对备份与后续变更。唯一索引安装后，不可直接恢复成两条有效记录。
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