28 lines
1.1 KiB
SQL
28 lines
1.1 KiB
SQL
-- 给 order_items 添加 spec_snapshot 字段，用于保存付款时的规格数据快照
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ALTER TABLE order_items ADD COLUMN spec_snapshot JSON DEFAULT NULL;
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-- 去掉 order_items 的 spec_data_id 外键约束（避免删除 spec_data 时级联删除订单商品）
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-- 先查找并删除外键
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SET @fk_name = (
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SELECT CONSTRAINT_NAME FROM information_schema.KEY_COLUMN_USAGE
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WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'order_items'
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AND COLUMN_NAME = 'spec_data_id' AND REFERENCED_TABLE_NAME = 'spec_data'
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LIMIT 1
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);
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SET @sql = IF(@fk_name IS NOT NULL, CONCAT('ALTER TABLE order_items DROP FOREIGN KEY ', @fk_name), 'SELECT 1');
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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-- 去掉 cart_items 的 spec_data_id 外键约束
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SET @fk_name2 = (
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SELECT CONSTRAINT_NAME FROM information_schema.KEY_COLUMN_USAGE
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WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'cart_items'
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AND COLUMN_NAME = 'spec_data_id' AND REFERENCED_TABLE_NAME = 'spec_data'
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LIMIT 1
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);
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SET @sql2 = IF(@fk_name2 IS NOT NULL, CONCAT('ALTER TABLE cart_items DROP FOREIGN KEY ', @fk_name2), 'SELECT 1');
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PREPARE stmt2 FROM @sql2;
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EXECUTE stmt2;
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DEALLOCATE PREPARE stmt2;
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