Solr查询匹配关系数据并计算为虚拟字段

Question

我的文件如下：

"id":4005,
"hotel_id":"258",
"hotel_city_code":"DXB",
"hotel_name":"NAIA BREEZE HOTEL APARTMENT BY DAMAC",
"hotel_star":"5",
"room_adults_child":"2-0"
_childDocuments_: [
    {
        map_date_rate:[
            {date:0901, rate:207.09},
            {date:0814, rate:207.09},
            {date:0815, rate:159.50},
            {date:0816, rate:200.00},
            {date:0820, rate:207.09},
            {date:0809, rate:207.09},
            {date:0825, rate:207.09},
            {date:0808, rate:207.09},
            {date:0818, rate:207.09},
            {date:0830, rate:207.09}
        ]
    }
]

如何编写查询以查找具有以下条件的所有文档：

room_adults_child: 2-0
map_date_rate.date:(0814 AND 0815 AND 0816)

然后选择这些文件的以下字段：

id, 
hotel_id,
room_rates:sum(map_date_rate.rate) 

上面的

room_rates 是一个虚拟字段，它将是搜索日期的总和：（207.09 + 159.50 + 200.00）= 566.59

感谢您的帮助。