Search After

search_after 类似于数据库游标，日常使用可用于 滚动分页查询

# search_after 
GET xxxindex/_search
{
  "size": 10,
  "sort": [
    {
      "Id": {
        "order": "asc"
      }
    }
  ],
  "query": {
    "match_all": {}
  },
  "search_after": [
    124270
  ]
}