title: Possible to un-anonymize VALUES clause?
body: <p>Let's say I have the following as a starting point:</p>
  <pre><code>select * from (values (1,'a'),(2,'b'))
  </code></pre>
  <p>Is it possible to provide column names to the value columns up-stream, for example something like:</p>
  <pre><code>select
      col1 AS id,
      col2 AS letter
  from (
      &lt;anonymous values&gt;
  )
  </code></pre>
  <p>Or is it basically once you have an anonymous <code>values</code> clause you cannot name it.</p>