47 lines
1.9 KiB
SQL
47 lines
1.9 KiB
SQL
-- 1. 修正余额 (依据核销事实)
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-- 这一步首先将 balance_amount 修正为客观的使用事实
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UPDATE user_coupons uc
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JOIN system_coupons sc ON uc.coupon_id = sc.id
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LEFT JOIN (
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SELECT user_coupon_id, SUM(applied_amount) as used_sum FROM order_coupons GROUP BY user_coupon_id
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) oc_agg ON uc.id = oc_agg.user_coupon_id
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LEFT JOIN (
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SELECT user_coupon_id, ABS(SUM(change_amount)) as used_sum FROM user_coupon_ledger WHERE action = 'apply' GROUP BY user_coupon_id
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) l_agg ON uc.id = l_agg.user_coupon_id
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SET uc.balance_amount = sc.discount_value - GREATEST(IFNULL(oc_agg.used_sum, 0), IFNULL(l_agg.used_sum, 0))
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WHERE sc.discount_type = 1 -- 仅限余额券
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AND uc.balance_amount != (sc.discount_value - GREATEST(IFNULL(oc_agg.used_sum, 0), IFNULL(l_agg.used_sum, 0)));
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-- 2. 逻辑 A: 如果余额已经扣完 (balance_amount = 0)，状态必须为 2 (已使用)
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-- 优先级最高，无论是否到期，只要用完了就是“已使用”
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UPDATE user_coupons uc
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SET uc.status = 2
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WHERE uc.balance_amount = 0
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AND uc.status != 2;
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-- 3. 逻辑 B: 如果余额 > 0，且已到期 (valid_end < NOW)，状态必须为 3 (已过期)
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-- 包含：完全没用的到期了、用了一半的到期了
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UPDATE user_coupons uc
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SET uc.status = 3
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WHERE uc.balance_amount > 0
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AND uc.valid_end < NOW()
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AND uc.status != 3;
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-- 4. 逻辑 C: 如果余额 > 0，且未到期 (valid_end > NOW)，状态必须为 1 (未使用/进行中)
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UPDATE user_coupons uc
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SET uc.status = 1
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WHERE uc.balance_amount > 0
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AND uc.valid_end > NOW()
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AND uc.status != 1;
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-- 5. 补全 used_order_id：对于已用完的券，确保关联了最后一次使用的订单ID
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UPDATE user_coupons uc
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JOIN (
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SELECT user_coupon_id, MAX(order_id) as last_order_id
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FROM order_coupons
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GROUP BY user_coupon_id
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) last_oc ON uc.id = last_oc.user_coupon_id
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SET uc.used_order_id = last_oc.last_order_id
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WHERE uc.balance_amount = 0
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AND (uc.used_order_id IS NULL OR uc.used_order_id = 0);
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