l1024-jav/src/main/resources/mapper/VideoInfoMapper.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" >

<!-- 当Mapper接口和XML文件关联的时候，namespace的值就需要配置成接口的全限定名称 -->
<mapper namespace="top.lvzhiqiang.mapper.VideoInfoMapper">

    <select id="getVideoInfoList" resultType="top.lvzhiqiang.entity.VideoInfo">
        select vi.*, IFNULL(vio.score, 0) AS score
        from video_info vi
        left join video_info_other vio on vi.identification_code = vio.identification_code and vio.delete_flag = 1
        where vi.delete_flag = 1
        <if test="keyword != null and keyword != ''">
            and (vi.name like #{keyword} or vi.identification_code like #{keyword})
        </if>
        <if test="genres != null and genres != ''">
            and exists(select 1 from video_info_genres vig where vig.name = #{genres} and vig.identification_code = vi.identification_code)
        </if>
        <if test="cast != null and cast != ''">
            and exists(select 1 from video_info_cast vic where vic.name = #{cast} and vic.identification_code = vi.identification_code)
        </if>
    </select>
</mapper>