使用Stream Analytics从Application Insights将自定义事件维度导出到SQL

Question

我正在使用Stream Analytics跟踪从Application Insights导出到SQL的示例演练.我试图导出自定义事件维度(下面的JSON示例中的context.custom.dimensions),它将作为嵌套的JSON数组添加到数据文件中.如何在context.custom.dimensions中展平维度数组以导出到SQL？

JSON ...

{
  "event": [
    {
      "name": "50_DistanceSelect",
      "count": 1
    }
  ],
  "internal": {
    "data": {
      "id": "aad2627b-60c5-48e8-aa35-197cae30a0cf",
      "documentVersion": "1.5"
    }
  },
  "context": {
    "device": {
      "os": "Windows",
      "osVersion": "Windows 8.1",
      "type": "PC",
      "browser": "Chrome",
      "browserVersion": "Chrome 43.0",
      "screenResolution": {
        "value": "1920X1080"
      },
      "locale": "unknown",
      "id": "browser",
      "userAgent": "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36"
    },
    "application": {},
    "location": {
      "continent": "North America",
      "country": "United States",
      "point": {
        "lat": 38.0,
        "lon": -97.0
      },
      "clientip": "0.115.6.185",
      "province": "",
      "city": ""
    },
    "data": {
      "isSynthetic": false,
      "eventTime": "2015-07-15T23:43:27.595Z",
      "samplingRate": 0.0
    },
    "operation": {
      "id": "2474EE6F-5F6F-48C3-BA43-51636928075A"
    },
    "user": {
      "anonId": "BA05C4BE-1C42-482F-9836-D79008E78A9D",
      "anonAcquisitionDate": "0001-01-01T00:00:00Z",
      "authAcquisitionDate": "0001-01-01T00:00:00Z",
      "accountAcquisitionDate": "0001-01-01T00:00:00Z"
    },
    "custom": {
      "dimensions": [
        {
          "CategoryAction": "click"
        },
        {
          "SessionId": "73ef454d-fa39-4125-b4d0-44486933533b"
        },
        {
          "WebsiteVersion": "3.0"
        },
        {
          "PageSection": "FilterFind"
        },
        {
          "Category": "EventCategory1"
        },
        {
          "Page": "/page-in-question"
        }
      ],
      "metrics": []
    },
    "session": {
      "id": "062703E5-5E15-491A-AC75-2FE54EF03623",
      "isFirst": false
    }
  }
}

Answer 1

稍微动态的解决方案是设置临时表:

WITH ATable AS (
SELECT
     temp.internal.data.id as ID
    ,dimensions.ArrayValue.CategoryAction as CategoryAction
    ,dimensions.ArrayValue.SessionId as SessionId 
    ,dimensions.ArrayValue.WebsiteVersion as WebsiteVersion 
    ,dimensions.ArrayValue.PageSection as PageSection 
    ,dimensions.ArrayValue.Category as Category 
    ,dimensions.ArrayValue.Page as Page  
FROM [analyticseventinputs] temp 
CROSS APPLY GetElements(temp.[context].[custom].[dimensions]) as dimensions)

然后根据唯一键进行连接

FROM [analyticseventinputs] Input 
Left JOIN ATable CategoryAction on 
    Input.internal.data.id = CategoryAction.ID AND
    CategoryAction.CategoryAction <> "" AND
     DATEDIFF(day, Input, CategoryAction) BETWEEN 0 AND 5 

相当恼人的一点是对datediff的要求,因为连接旨在组合2个数据流,但在这种情况下,您只加入唯一键.所以我把它设置为5天的大值.与其他解决方案相比,这实际上只能防止自定义参数不符合要求.

Answer 2

大多数教程在线使用CROSS APPLY或OUTER APPLY但是这不是你想要的,因为它会将每个属性放在不同的行上.为了解决这个问题,请使用以下函数:GetRecordPropertyValue和GetArrayElement.这会将属性展平为一行.

SELECT
    GetRecordPropertyValue(GetArrayElement(MySource.context.custom.dimensions, 0), 'CategoryAction') AS CategoryAction,
    GetRecordPropertyValue(GetArrayElement(MySource.context.custom.dimensions, 1), 'SessionId') AS SessionId,
    GetRecordPropertyValue(GetArrayElement(MySource.context.custom.dimensions, 2), 'WebsiteVersion') AS WebsiteVersion,
    GetRecordPropertyValue(GetArrayElement(MySource.context.custom.dimensions, 3), 'PageSection') AS PageSection,
    GetRecordPropertyValue(GetArrayElement(MySource.context.custom.dimensions, 4), 'Category') AS Category,
    GetRecordPropertyValue(GetArrayElement(MySource.context.custom.dimensions, 5), 'Page') AS Page
INTO
  [outputstream]
FROM
  [inputstream] MySource