document_management/src/main/resources/mapper/CaseContentMapper.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.bsd.cases.mapper.CaseContentMapper">
    <select id="searchBak" resultType="com.bsd.cases.vo.CaseContentBakVo">
        SELECT a.id,a.content_title,a.url,a.category_id,a.level3_name as category_name,a.create_date_time,a.update_date_time,a.create_by,a.update_by,
        a.state,a.`level_id2`,ccy.parent_id as `level_id1`
        FROM (select cc.`id`,cc.`content_title`,cc.`url`,cc.`category_id`,ccy.`name` as level3_name,
        cc.`create_date_time`,cc.`update_date_time`,cc.`create_by`,cc.`update_by`,cc.`state`,ccy.parent_id as level_id2
        FROM case_content cc
        left join case_category ccy
        on ccy.id = cc.category_id) a
        left join case_category ccy
        on a.level_id2 = ccy.id
        WHERE
        1 = 1 AND a.state = 1
        <if test="level1Id != null">
            AND ccy.parent_id = #{level1Id}
        </if>
        <if test="level2Id != null">
            AND a.`level_id2` = #{level2Id}
        </if>
        <if test="level3Id != null">
            and a.category_id = #{level3Id}
        </if>
        <if test="name != null and name != ''">
           and a.`content_title` LIKE CONCAT('%',#{name},'%')
        </if>
    </select>
</mapper>