Azure Stream Analytics转换数组值

Question

非常具体的问题，如果我的Streaming Analytics组件中有以下输入：

<ControlTemplate x:Key="RoundButton" TargetType="Button">
    <Grid x:Name="RootGrid" Background="{TemplateBinding Background}">
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="CommonStates">
                <VisualState x:Name="Normal">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="CornerRadius">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="5"/>
                        </ObjectAnimationUsingKeyFrames>
                        <PointerUpThemeAnimation Storyboard.TargetName="RootGrid"/>
                    </Storyboard>
                </VisualState>
                <VisualState x:Name="PointerOver">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="#FF005250"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Background">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="#80005250"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="White"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="CornerRadius">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="5"/>
                        </ObjectAnimationUsingKeyFrames>
                        <PointerUpThemeAnimation Storyboard.TargetName="RootGrid"/>
                    </Storyboard>
                </VisualState>
                <VisualState x:Name="Pressed">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="#FF005250"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="#FF005250"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="White"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="CornerRadius">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="5"/>
                        </ObjectAnimationUsingKeyFrames>
                        <PointerDownThemeAnimation Storyboard.TargetName="RootGrid"/>
                    </Storyboard>
                </VisualState>
                <VisualState x:Name="Disabled">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="#FF424A51"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="#FFCCD2D6"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="#FF424A51"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="CornerRadius">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="5"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
        <ContentPresenter x:Name="ContentPresenter"
                          BorderBrush="{TemplateBinding BorderBrush}"
                          BorderThickness="{TemplateBinding BorderThickness}"
                          Content="{TemplateBinding Content}"
                          CornerRadius="5"
                          ContentTransitions="{TemplateBinding ContentTransitions}"
                          ContentTemplate="{TemplateBinding ContentTemplate}"
                          Padding="{TemplateBinding Padding}"
                          HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                          VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
                          AutomationProperties.AccessibilityView="Raw"/>
    </Grid>
</ControlTemplate>

如何获得如下所示的JSON结果：

 //some input
 "outputs": [
  {
    "name": "output1",
    "unit": "unit1",
    "value": "95813"
  },
  {
    "name": "output2",
    "unit": "unit2",
    "value": "303883"
  }, // and more array values

所以，我不需要单位值，为了节省空间，我想使用'name'作为键，'value'作为键值数组的值。 这是我目前的查询：

"outputs":[ {
   "output1":95813,
   "output2":303883
   //etc
 }]

但这当然会创建单独的JSON数组，其结构与我输入的结构相同。

有人知道如何做到这一点吗？

在最坏的情况下，过滤掉“单位”也会有很大的帮助。

提前致谢

Answer 1

您可以在Azure Stream Analytics中使用user-defined functions。请参考我为您测试的示例功能。

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;  
}

查询：

WITH 
c AS
(
    SELECT 
    udf.processArray(jsoninput) as result
    from jsoninput
)
SELECT
    c.result
INTO
    jaycosmostest
FROM
    c

测试输出：

希望它对你有所帮助。