Azure 流分析无法触发 Azure Function

Question

我创建了一个 Azure 函数，用于在设备向 Azure IoT 中心发送数据时将结果返回给设备。我按照tutorial 将输出发送到 SQL 和 Azure 函数。这是我的 ASA 查询。

WITH subquery as (
    SELECT 
    messageId,
    deviceId,
    temperature, 
    humidity,
    EventProcessedUtcTime,
    DemoML(temperature, humidity) as result1
    from DemoInput
    )

SELECT
    messageId as messageId,
    deviceId as deviceId,
    temperature as temperature,
    humidity as humidity,
    EventProcessedUtcTime as EventProcessedUtcTime,
    result1.[Scored Labels] as result,
    result1.[Scored Probabilities] as resultProbability
INTO
    [DemoOutput]
FROM
    [subquery]


SELECT
    *
INTO
    [c2d]
FROM
    [subquery] 

我不知道为什么它不会触发 Azure 功能。但是当我将最后一行从 [subquery] 更改为 [DemoInput] 时，它将起作用。为什么会这样？

Answer 1

仅出于测试目的尝试以下查询。请注意，我取出了您的 DemoML 函数，输出用于 Blob 存储。您应该会在 AF 和 Blob 存储中看到输出：

WITH subquery as (
     SELECT 
       System.Timestamp as time,
       temperature, 
       humidity,
       EventProcessedUtcTime,
       IoTHub.ConnectionDeviceId as deviceId,
       IoTHub.MessageId as messageId
     FROM
       DemoInput Timestamp by time
    )

SELECT
    messageId as messageId,
    deviceId as deviceId,
    temperature as temperature,
    humidity as humidity,
    EventProcessedUtcTime as EventProcessedUtcTime
INTO
    DemoOutputBlob
FROM
    subquery


SELECT
    *
INTO
    c2d
FROM
    subquery