title: What backend does Flink Table API use ? Does it require any relational DB?
body: <p>I'm fairly new to Flink and trying to understand appropriate use cases where Stream API/ Table API can be used. As part of it trying to understand</p>
  <ol>
  <li>like Stream API, does Table API has the flexibility to choose the type of state backend it can use?</li>
  <li>What are all the available backend for Table API, does it require any external datastores like My SQL? or any other datastore?</li>
  </ol>
  <p>In short, trying to understand the work around the backend used by Table API.</p>