21 lines
1.0 KiB
SQL
21 lines
1.0 KiB
SQL
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-- MySQL 8.0.16+；对Lastleg连接的实例完整执行，遇错停止。DDL隐式提交。
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USE `baiyue_lastleg`;
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SET NAMES utf8mb4;
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SELECT DATABASE() AS target_database, @@hostname AS mysql_host, @@port AS mysql_port;
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-- 整箱废弃后保留SKU明细，剩余数量允许归零，仍禁止负库存。
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-- 原子替换约束，可重复执行；不修改业务记录。
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SET @ddl = IF(EXISTS (
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SELECT 1 FROM information_schema.table_constraints
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WHERE constraint_schema=DATABASE() AND table_name='ll_return_inventory_carton_item'
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AND constraint_name='chk_ll_return_inventory_carton_item_quantity'
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),
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'ALTER TABLE ll_return_inventory_carton_item DROP CHECK chk_ll_return_inventory_carton_item_quantity, ADD CONSTRAINT chk_ll_return_inventory_carton_item_quantity CHECK(quantity>=0)',
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'ALTER TABLE ll_return_inventory_carton_item ADD CONSTRAINT chk_ll_return_inventory_carton_item_quantity CHECK(quantity>=0)'
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);
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PREPARE stmt FROM @ddl;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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SHOW CREATE TABLE ll_return_inventory_carton_item;
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