<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
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<mapper namespace="com.oying.modules.pc.product.mapper.ProductStockMapper">
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<!-- 更新库存 -->
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<update id="updateStock">
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UPDATE pc_product SET
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stock_quantity = #{quantity},
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version = version + 1
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WHERE
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product_id = #{productId} AND version = #{version}
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</update>
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<!-- 批量更新库存 -->
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<update id="batchUpdateStock" parameterType="list">
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<foreach collection="list" item="item" index="index" separator=";">
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UPDATE products
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SET stock_quantity = #{item.quantity}, version = version + 1
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WHERE
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product_id = #{item.productId} AND version = #{item.version}
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</foreach>
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</update>
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<!-- 增加库存 -->
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<update id="increaseStock">
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UPDATE pc_product SET
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stock_quantity = stock_quantity + #{amount},
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version = version + 1
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WHERE
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product_id = #{productId} AND version = #{version}
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</update>
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<!-- 减少库存 -->
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<update id="decreaseStock">
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UPDATE pc_product SET
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stock_quantity = stock_quantity - #{amount},
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version = version + 1
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WHERE
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product_id = #{productId} AND version = #{version}
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</update>
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<!-- 查询最低库存商品 -->
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<select id="selectLowStockProducts">
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SELECT * FROM products
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WHERE stock_quantity <![CDATA[ <= ]]> #{threshold}
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ORDER BY stock_quantity ASC
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</select>
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</mapper>
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