title: list Postgres ENUM type
body: <p>The <a href="https://stackoverflow.com/questions/3660787/how-to-list-custom-types-using-postgres-information-schema">suggested query to list ENUM types</a> is great. But, it merely lists of the <code>schema</code> and the <code>typname</code>.  How do I list out the actual ENUM values? For example, in the linked answer above, I would want the following result</p>
  
  <pre><code>schema         type      values
  -------------  --------  -------
  communication  channels  'text_message','email','phone_call','broadcast'
  </code></pre>