Question

我想使用包含CROSS APPLY GetArrayElements（）的流分析查询将该数组转换为行，但是此函数需要一个数组名称。显然没有名字。有什么建议吗？

要解析的JSON示例：

{
  "Alert1": {
    "Site": "11109370",
    "Sensor": "UPS",
    "Event": "Load Not Protected",
    "Time": "08-28-2019 10:39:02",
    "Value": "0",
    "Threshold": 0,
    "Severity": "2",
    "Status": "Open"
  },
  "Alert2": {
    "Site": "11109370",
    "Sensor": "UPS",
    "Event": "Emergency stop",
    "Time": "08-28-2019 10:39:02",
    "Value": "1",
    "Threshold": 1,
    "Severity": "2",
    "Status": "Open"
  },
  "Alert3": {
    "Site": "11109370",
    "Sensor": "UPS",
    "Event": "Load Protected(UPS Coupled)",
    "Time": "08-28-2019 10:39:02",
    "Value": "0",
    "Threshold": 0,
    "Severity": "1",
    "Status": "Open"
  },
  "Alert4": {
    "Site": "11109370",
    "Sensor": "UPS",
    "Event": "Battery Deep Discharge Protection",
    "Time": "08-28-2019 10:39:02",
    "Value": "0",
    "Threshold": 0,
    "Severity": "1",
    "Status": "Open"
  },
  "Alert5": {
    "Site": "11109370",
    "Sensor": "UPS",
    "Event": "Battery Present",
    "Time": "08-28-2019 10:39:02",
    "Value": "0",
    "Threshold": 0,
    "Severity": "1",
    "Status": "Open"
  },
  "Alert6": {
    "Site": "11109370",
    "Sensor": "UPS",
    "Event": "Sensor Communication Error",
    "Time": "08-28-2019 10:39:02",
    "Status": "Close"
  }
}

我尝试了以下代码，但遇到错误：

错误：列名无效：“ arrayvalue”。具有该名称的列不存在。

SELECT message.ArrayValue
FROM INPUT as event
CROSS APPLY GetRecordProperties(event) AS message

Answer 1

您的方向是正确的，但是，我认为您在使用GetRecordProperties函数时犯了一些错误。

请参阅正式文档中的example，而不是任何ArrayValue属性：

SELECT   
    recordProperty.PropertyName,  
    recordProperty.PropertyValue  
FROM input as event  
CROSS APPLY GetRecordProperties(event.recordField) AS recordProperty

根据您的情况，可以在sql下面执行：

SELECT   
    recordProperty.PropertyName,  
    recordProperty.PropertyValue  
FROM input as event  
CROSS APPLY GetRecordProperties(event) AS recordProperty

输出：

我问过您要如何处理Alert1,Alert2属性，如果要删除它们，请在sql下面使用：

SELECT    
    recordProperty.PropertyValue.Site,  recordProperty.PropertyValue.Sensor....<more your columns>
FROM input as event  
CROSS APPLY GetRecordProperties(event) AS recordProperty

输出：

流分析-处理没有数组名称的JSON

1 个答案: