title: SELECT INTO with more than one attribution
body: <p>This instruction works:</p>
  <pre><code>SELECT INTO unsolvedNodes array_agg(DISTINCT idDestination)
  FROM road 
  WHERE idOrigin = ANY(solvedNodes)
  AND NOT (idDestination = ANY(solvedNodes));
  </code></pre>
  <p>But I would like to use something this way:</p>
  <pre><code>SELECT INTO unsolvedNodes array_agg(DISTINCT idDestination), lengths array_agg(length)
  FROM road
  WHERE idOrigin = ANY(solvedNodes)
  AND NOT (idDestination = ANY(solvedNodes));
  </code></pre>
  <p>How to use only one <code>SELECT INTO</code> instruction to set multiple variables?</p>