title: How to get aggregated data for a particular day in spark structured streaming
body: <p>i have one spark structured steaming job that read streams from kafka and write output to HDFS.
  My issue is i need an aggregated results for the entire day till particular time.
  Since spark structured streaming doesn't support complete/update mode, is there nay way to achieve same?</p>
  
  <p>if i get data 10.00 AM , i need an aggregated result till 10.00 AM for the current date...</p>
  
  <p>can some one help how to achieve same ?</p>