Azure 流分析 GetRecordPropertyValue 难题

Question

任何人都可以轻松地发现我在这里做错了什么吗？

我正在使用以下查询：

SELECT
    GetArrayElement(Requests.context.custom.dimensions, 0),
    GetType( GetArrayElement(Requests.context.custom.dimensions, 0)),
    GetRecordPropertyValue(GetArrayElement(Requests.context.custom.dimensions, 0), "Response-Body")
INTO
    PowerBICreateScheduleDurations
FROM
    AppInsightsIncomingRequests AS Requests

要解析此输入文件：

{ "request"：[{ "id": "dff22190-ecc8-44d2-aa3f-453c3d533c4d", "name": "", "count": 1, "responseCode": 401, "success"：错误， "url": "", "urlData"：{ "base": "", "host": "", "hashTag": "", "protocol": "https" }, "durationMetric"：{ "value": 4786.0, "count": 1.0, "min": 4786.0, "max": 4786.0, "stdDev": 0.0, "sampledValue"：4786.0 } } ], "internal"：{ "data"：{ "id": "f0b0f800-ab16-11e8-89c8-ed6412963258", "documentVersion"：“1.61” } }, "context"：{ "data"：{ "eventTime": "2018-08-28T23:05:54.8884157Z", "isSynthetic"：错误， "samplingRate": 100.0 }, "cloud"：{}， "device"：{ "type": "PC", "roleName": "", "roleInstance": "", "screenResolution"：{} }, "session"：{ "isFirst": 错误 }, "operation"：{ "id": "dff22190-ecc8-44d2-aa3f-453c3d533c4d", "parentId": "dff22190-ecc8-44d2-aa3f-453c3d533c4d", "name"：“” }, "location"：{ "clientip": "0.0.0.0", "continent": "North America", "country": "United States" }, "custom"：{ "dimensions": [{ "Response-Body": "response 0" }, { "Operation Name"：“” }, { "ApimanagementRegion"：“” }, { "ApimanagementServiceName"：“” }, { "Cache": "None" }, { "API Name"：“” }, { "HTTP Method": "GET" } ], "metrics"：[{ "Response Size"：{ "count": 1.0, "max": 343.0, "min": 343.0, "sampledValue": 343.0, "stdDev": 0.0, "sum": 343.0, "value": 343.0 } }, { "Request Size"：{ "count": 1.0, "max": 0.0, "min": 0.0, "sampledValue": 0.0, "stdDev": 0.0, "sum": 0.0, "value"：0.0 } }, { "Client Time (in ms)"：{ "count": 1.0, "max": 0.0, "min": 0.0, "sampledValue": 0.0, "stdDev": 0.0, "sum": 0.0, "value"：0.0 } } ] } } }

期望的行为是 GetRecordPropertyValue... 行提取 "response 0" 字符串，但它 returns 为空。下载的输出如下：

[{
        "getarrayelement": {
            "Response-Body": "response 0"
        },
        "gettype": "record",
        "getrecordpropertyvalue": null
    }
]

Answer 1

请将您的查询更改为在 'Response-Body' 周围使用单引号。在 SQL 中，双引号用于转义列名（类似于 []），因此您的查询被解释为名称为 "Response-Body" 的列，而不是字符串常量 "Response-Body"

SELECT GetArrayElement(Requests.context.custom.dimensions, 0), GetType( GetArrayElement(Requests.context.custom.dimensions, 0)), GetRecordPropertyValue(GetArrayElement(Requests.context.custom.dimensions, 0), 'Response-Body') 进入 PowerBICreateScheduleDurations 从 AppInsightsIncomingRequests AS 请求

Azure 流分析 GetRecordPropertyValue 难题

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