mapper

    User selectNickNameAndUserId(@Param(Constants.WRAPPER) LambdaQueryWrapper<User> queryWrapper);

mapper.xml

 <select id="selectNickNameAndUserId" resultType="com.example.demo.entity.User">
        select
            <if test="ew != null and ew.SqlSelect != null and ew.SqlSelect != ''">
                ${ew.SqlSelect}
            </if>
        from
            user
        ${ew.customSqlSegment}
    </select>