mybatis 使用concat 模糊查询方式

<select id="queryByKeyWord" resultType="com.mingdutech.xelerator.eln.dto.ApparatusDto">
        select distinct b.*
        from base_apparatus b
        left join base_apparatus_column c
        on b.ID = c.apparatus_id
        <if test="keyWord != null">
            <where>
                CONCAT( IFNULL(b.name,''),
                IFNULL(code,''),
                IFNULL(serial,''),
                IFNULL(location,''),
                IFNULL(remark,''),
                IFNULL(b.create_user,''),
                IFNULL(b.update_user,''),
                IFNULL(c.field_value,''),
                IFNULL(batch_no,'') )
                like CONCAT('%',#{keyWord},'%')
            </where>
        </if>
    </select>