title: RESTRICTED_USER
body: <p>Before changing database schema I issue:</p>
  
  <pre><code>ALTER DATABASE SET RESTRICTED_USER
  </code></pre>
  
  <p>On completion:</p>
  
  <pre><code>ALTER DATABASE SET MULTI_USER
  </code></pre>
  
  <p>I understand that a running transaction will be permitted to continue until completion.</p>
  
  <p>Q: Is there any way to wait till all regular users are off the database?</p>
  
  <p>Q: Can the regular users issue more transactions? Can they continue working until disconnected from the server?</p>