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[英]Query for Power BI Output from Azure Stream Analytics with JSON data
[英]Wrapping JSON into output Stream Analytics query
我正在使用Stream Analytics查詢來過濾輸入的Complex Json對象。
輸入:
{
"id" : "001",
"firstArray":[
{
"tid" : 9,
"secondArray":[
{
"key1" : "value1",
"key2" : "value2"
},
{...}
]
},
{
"tid" : 8,
"secondArray":[
{
"key1" : "value1",
"key2" : "value2"
},
{...}
]
}
]
}
這是我的查詢:
WITH T1 AS
(
SELECT
FirstArray.ArrayValue.Tid as Tid,
FirstArray.ArrayValue.secondArray as SecondArray
FROM
inputfromeventhub MySource
OUTER APPLY GetElements(MySource.firstArray) AS FirstArray
)
SELECT
T1.Tid as Tid,
SecondArray.ArrayValue.key1 as key1,
SecondArray.ArrayValue.key2 as key2
INTO exitstream
OUTER APPLY GetElements(T1.SecondArray) as SecondArray
我得到這樣的東西:
[
{
"tid":9,
"key1": "value1",
"key2": "value2"
},
{
"tid":8,
"key1": "value1",
"key2": "value2"
}
]
我想將此JSON數組包裝到具有唯一“ id”的JSON對象中,以得到如下所示的內容:
{
"id":"001",
"array":[
{
"tid":9,
"key1": "value1",
"key2": "value2"
},
{
"tid":8,
"key1": "value1",
"key2": "value2"
}
]
}
我找不到辦法。 我嘗試創建調用用戶定義函數的第三個選擇:
function main(obj) {
var out_obj = {};
out_obj.id = "001";
out_obj.array = obj;
return JSON.stringify(out_obj);
}
但這應用於數組中的每個對象。所以我得到了:
[
{ "myFunction": "{\"id\":\"001\",\"array{\"tid\":9,\"key1\":\"value1\",\"key2\":\"value2\"}"
},
{ "myFunction": "{\"id\":\"001\",\"array{\"tid\":8,\"key1\":\"value1\",\"key2\":\"value2\"}"
}
]
有沒有辦法用查詢將所有嵌套對象包裝在該數組中?
根據您的要求,我測試了此問題,您可以參考以下代碼段代碼:
JavaScript UDF
function main(obj) {
var out_obj = [];
for(var i=0;i<obj.length;i++){
var o=obj[i];
for(var j=0;j<o.secondArray.length;j++){
o1=o.secondArray[j];
out_obj.push({tid:o.tid,key1:o1.key1,key2:o1.key2});
}
}
return out_obj;
}
QUERY
SELECT
MySource.id,
udf.aggreate(MySource.firstArray) as array
FROM
[inputfromeventhub] MySource
輸入
{
"id" : "001",
"firstArray":[
{
"tid" : 9,
"secondArray":[
{
"key1" : "value01",
"key2" : "value02"
},
{
"key1" : "value03",
"key2" : "value04"
}
]
},
{
"tid" : 8,
"secondArray":[
{
"key1" : "value11",
"key2" : "value12"
},
{
"key1" : "value13",
"key2" : "value14"
}
]
}
]
}
產量
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