druid：查询交并非的逻辑

算法类型thetaSketchSetOp：
UNION：取并集
NTERSECT：取交集
NOT：取前后顺序的集合差， 顺序很重要， 顺序不一致导致结果不一致

算法类型thetaSketchEstimate：
pass

{
  "aggregations": [
    {
      "type": "filtered",
      "filter": {
        "type": "and",
        "fields": [
          {
            "type": "interval",
            "dimension": "__time",
            "intervals": [
              "2019-08-04T16:00:00.000Z/2019-08-05T16:00:00.000Z"
            ]
          },
          {
            "type": "selector",
            "dimension": "event",
            "value": "startup"
          },
          {
            "type": "selector",
            "dimension": "appkey",
            "value": "appyinlizixun"
          }
        ]
      },
      "aggregator": {
        "fieldName": "unique_user",  //对以上的条件查询出来的结果的unique_user进行去重计算给active_user
        "type": "thetaSketch",  //去重函数
        "name": "active_user",
        "isInputThetaSketch": false,
        "size": 16384
      }
    },
    {
      "type": "filtered",
      "filter": {
        "type": "and",
        "fields": [
          {
            "type": "interval",
            "dimension": "__time",
            "intervals": [
              "2019-07-05T16:00:00.000Z/2019-07-06T16:00:00.000Z"
            ]
          },
          {
            "type": "selector",
            "dimension": "event",
            "value": "startup"
          },
          {
            "type": "selector",
            "dimension": "appkey",
            "value": "appyinlizixun"
          }
        ]
      },
      "aggregator": {
        "fieldName": "unique_user",
        "type": "thetaSketch",
        "name": "new_user",
        "isInputThetaSketch": false,
        "size": 16384
      }
    }
  ],
  "intervals": "2019-07-05T16:00:00.000Z/2019-08-05T16:00:00.000Z",
  "dataSource": "appyinlizixun-app_statistic",
  "granularity": "all",
  "threshold": 100000,
  "postAggregations": [
    {
      "field": {
        "fields": [
          {
            "fieldName": "active_user", //上面俩个
            "type": "fieldAccess"
          },
          {
            "fieldName": "new_user", //上面两个
            "type": "fieldAccess"
          }
        ],
        "type": "thetaSketchSetOp",
        "func": "NOT"
      },
      "type": "thetaSketchEstimate",
      "name": "user_lost"
    },
    {
      "field": {
        "fields": [
          {
            "fieldName": "active_user",
            "type": "fieldAccess"
          },
          {
            "fieldName": "new_user",
            "type": "fieldAccess"
          }
        ],
        "type": "thetaSketchSetOp",  
        "func": "INTERSECT"
      },
      "type": "thetaSketchEstimate", 
      "name": "user_retain"
    }
  ],
  "queryType": "topN",
  "dimension": "day",
  "metric": "new_user"
}