wms/nflg-wms-repository/src/main/resources/mapper/UsageGuideMapper.xml

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XML

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.nflg.wms.repository.mapper.UsageGuideMapper">
<select id="getFiles" resultType="com.nflg.wms.common.pojo.vo.UsageGuideVO">
SELECT g.*,d.name AS "category_name"
FROM usage_guide g
LEFT JOIN dictionary_item d ON g.category_id=d."id"
<where>
<if test="categoryId != null">
g.category_id = #{categoryId}
</if>
</where>
order by g.id desc
</select>
</mapper>