title: How to project json key value pair to columns without explicitly specifying name
body: <p>In <code>customDimensions</code> I have x number of key-value pair data (currently only two <code>Name</code> and <code>Channel</code> as an example in the screenshot below)</p>
  
  <p><a href="https://i.stack.imgur.com/KcnDg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KcnDg.png" alt="enter image description here"></a></p>
  
  <p>and I would like to project them to columns <strong>without explicitly specify the name of the key</strong>, so that in the future, if a new key-value pair added to the log, I don't have to go back and modify my query in order to display it as a new column.</p>
  
  <p><a href="https://i.stack.imgur.com/Y3SUm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Y3SUm.png" alt="enter image description here"></a></p>
  
  <p>Thank you!</p>