62 lines
2.3 KiB
SQL
62 lines
2.3 KiB
SQL
-- ============================================================
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-- discount 模块迁移脚本：新增 discount_detail 表
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-- 从旧版 discount 表迁移折扣值到 discount_detail
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-- 日期: 2026-05-24
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-- 执行前请备份数据库！
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-- ============================================================
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-- 1. 创建 discount_detail 表
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CREATE TABLE IF NOT EXISTS discount_detail
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(
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`id` VARCHAR(32) NOT NULL COMMENT 'id',
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`discountid` VARCHAR(32) NOT NULL COMMENT '折扣id',
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`resellerid` VARCHAR(32) DEFAULT '*' COMMENT '商户id',
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`prodtypeid` VARCHAR(32) DEFAULT NULL COMMENT '产品类型id',
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`productid` VARCHAR(32) DEFAULT NULL COMMENT '产品id',
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`discount` double(5,4) COMMENT '折扣值',
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PRIMARY KEY(id),
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INDEX idx_dd_discountid (discountid),
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INDEX idx_dd_product (discountid, prodtypeid, productid)
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)
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CHARACTER SET utf8mb4
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COLLATE utf8mb4_unicode_ci
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engine=innodb
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COMMENT '折扣产品明细';
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-- 2. 为 discount 表添加 name 字段（如果不存在）
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ALTER TABLE discount ADD COLUMN IF NOT EXISTS `name` VARCHAR(100) COMMENT '折扣名称';
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-- 3. 将现有 discount 记录的 discount 值迁移到 discount_detail
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-- 为每条 discount 记录创建一条默认明细（prodtypeid=NULL, productid=NULL）
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INSERT IGNORE INTO discount_detail (id, discountid, resellerid, prodtypeid, productid, discount)
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SELECT
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CONCAT('mig_', id, '_default') AS id,
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d.id AS discountid,
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d.resellerid,
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NULL AS prodtypeid,
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NULL AS productid,
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d.discount
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FROM discount d
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WHERE d.discount IS NOT NULL AND d.discount > 0
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AND NOT EXISTS (
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SELECT 1 FROM discount_detail dd
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WHERE dd.discountid = d.id
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AND dd.prodtypeid IS NULL
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AND dd.productid IS NULL
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);
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-- ============================================================
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-- 验证步骤（执行后运行）:
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-- 1. 确认表创建成功:
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-- SHOW TABLES LIKE 'discount_detail';
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-- 2. 确认明细记录已迁移:
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-- SELECT COUNT(*) FROM discount_detail;
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-- SELECT * FROM discount_detail ORDER BY discountid;
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-- 3. 确认 discount 表 name 字段存在:
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-- DESCRIBE discount;
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-- ============================================================
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-- 回滚步骤（如需撤销）:
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-- DROP TABLE IF EXISTS discount_detail;
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-- ALTER TABLE discount DROP COLUMN IF EXISTS name;
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-- ============================================================
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