title: How to use configuration data in Azure Stream Analytics Job?
body: <p>I have a Stream Analytics job streaming data from an EventHub. The job makes use of multiple Javascript functions to perform some calculations. I would like to pass in some configuration (preferrably JSON from Blob Storage) to those functions. Is there any way to do this?</p>
  <p>I could read the configuration from Blob Storage as reference data input but I don't want to join the config (JSON) with thousands of input rows from the event hub as that becomes extremely inefficient. I just want to fecth a single config object and pass it into the functions.</p>
  <p>Any ideas?</p>
  <pre><code>SomeData AS (  
      SELECT
          Data, 
          UDF.PerformSomeCalculations(Data.Cars, Data.Trains, ConfigFromBlob) AS ProcessedData,
      FROM DataFromPreviousStep
  )
  </code></pre>