如何在Solr搜索中使用分组进行分页

Question

solr文档的文档结构如下所述，我需要提取具有event_name="product view"的文档并通过电子邮件将其分组，以便电子邮件不会重复。现在在列出电子邮件时如何对唯一电子邮件进行分页。由于查询返回的文档总数不是组数

"docs":[
      {
        "id":"1",
        "email":"xxxxxx@gmail.com",
        "gender":"M",
        "location":["yyy"],
        "created":123444,
        "event_name":"product viewed",
        "event_property":"product",
        "event_value":"sun glassed",
        "_version_":1617201602734587904,
        "location_str":["yyyy"]
      },
      {
        "id":"4",
        "email":"xxxxxx@gmail.com",
        "gender":"F",
        "location":["zzzz"],
        "created":123447,
        "event_name":"Add To Cart",
        "event_property":"Name",
        "event_value":"sun glasses",
        "_version_":1617202784870858752,
        "location_str":["zzzz"]
      },
      {
        "id":"5",
        "email":"xxxxxx@gmail.com",
        "gender":"M",
        "location":["kkkkk"],
        "created":123464,
        "event_name":"Product Clicked",
        "event_property":"Category",
        "event_value":"Contact Lens",
        "_version_":1617202784871907328,
        "location_str":["lllll"]
     }
    ]