Azure Stream Analytics convert array values - azure

Question

Very specific question, if I have the following input in my Streaming Analytics component:
//some input
"outputs": [
{
"name": "output1",
"unit": "unit1",
"value": "95813"
},
{
"name": "output2",
"unit": "unit2",
"value": "303883"
}, // and more array values
How can I get a JSON result that would look as follows:
"outputs":[ {
"output1":95813,
"output2":303883
//etc
}]
So, I don't need the unit value, and to save space, I'd like to use the 'name' as the key, and the 'value' as the value of the key-value array.
This is my current query:
SELECT
input.outputs as outputs
INTO "to-mongodb"
FROM "from-iothub" input
but this of course creates seperate JSON arrays, with the same structure as I do get as my input.
Anyone any idea on how to do this?
In worst case, just filtering out the 'unit' would also already be a great help.
Thanks in advance

Answer 1

You could use user-defined functions in Azure Stream Analytics. Please refer to the sample function I tested for you.
UDF:
function main(arg) {
var array = arg.outputs;
var returnJson = {};
var outputArray = [];
var map = {};
for(var i=0;i<array.length;i++){
var key=array[i].name;
map[key] = array[i].value;
}
outputArray.push(map);
returnJson = {"outputs" : outputArray};
return returnJson;
}
Query:
WITH
c AS
(
SELECT
udf.processArray(jsoninput) as result
from jsoninput
)
SELECT
c.result
INTO
jaycosmostest
FROM
c
Test Output:
Hope it helps you.