title: Create trigger based on insertion/updation in spanner database
body: <p>I want to run a nodejs Job whenever an entry is created on the spanner database. The entry in spanner database will contain some future timestamp. The nodejs Job should run at that particular timestamp.</p>
  
  <p>Can I apply some db trigger to initiate the action?</p>
  
  <p>Note: The nodejs Job is deployed on GKE</p>