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我是 Azure 流分析的新手。我浏览了有关基于阈值的规则的Microsoft 文章。并为基于单一条件的规则使用以下配置,我也可以获得正确的输出。

我的参考/规则数据:

{
    "rule_id": 1234,
    "device_id": "xyz",
    "property": "Temperature",
    "alert_message": "High temperature: Temperature above 93 °C",
    "operator": "GREATEROREQUAL",
    "threshold": 93
}

我的示例遥测数据包:

{
    "deviceId": "xyz",
    "Temperature": 45.43,
    "Pressure": 55.32
}

我的流分析输入是 IOTHUB,输出是 Azure 函数。

我的流分析查询:

SELECT tl.*, [rule]
FROM IOTHUB as tl TIMESTAMP BY tl.EventEnqueuedUtcTime
JOIN ReferenceData [rule]
ON [rule].device_id = tl.deviceId 
WHERE (
    ([rule].operator = 'GREATEROREQUAL' AND GetRecordPropertyValue(tl, [rule].property) >= [rule].threshold) OR 
    ([rule].operator = 'LESSOREQUAL' AND GetRecordPropertyValue(tl, [rule].property) <= [rule].threshold) OR 
    ([rule].operator = 'EQUAL' AND GetRecordPropertyValue(tl, [rule].property) = [rule].threshold) OR
    ([rule].operator = 'LESS' AND GetRecordPropertyValue(tl, [rule].property) < [rule].threshold) OR 
    ([rule].operator = 'GREATER' AND GetRecordPropertyValue(tl, [rule].property) > [rule].threshold)
)

但是现在,我需要配置满足多个条件的规则。我尝试了几种方法,但无法使其动态化。
我尝试在查询的 WHERE 条件中使用自定义 UDF 函数来动态生成查询。但不幸的是,这也不支持。(如果我错了,请纠正我)。

例如我的新参考/规则数据是:

{
    "rule_id": 1233,
    "device_id": "xyz",
    "alert_message": "Temperature above 93 °C & Pressure beyond range (50-100)",
    "conditions": [
        {
            "property": "Temperature",
            "operator": "GREATEROREQUAL",
            "threshold": 93
        },
        "AND",
        [
            {
                "property": "Pressure",
                "operator": "LESSOREQUAL",
                "threshold": 50
            },
            "OR",
            {
                "property": "Pressure",
                "operator": "GREATEROREQUAL",
                "threshold": 100
            }
        ]
    ]
}
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