title: get_detailed_sqlerrm syntax on PL/SQL
body: <p>I'm trying to debug an "HTTP Request Failed" error on PL/SQL for a function trying to consume a SOAP web service. The suggestion is to use get_detailed_sqlerrm to get the details of the error message, but when I try to run the suggested query, it throws an "invalid SQL statement" error.</p>
  
  <p>My query:</p>
  
  <pre><code>UTL_HTTP.get_detailed_sqlerrm 
  RETURN VARCHAR2;
  </code></pre>
  
  <p>I'm using the PL/SQL Developer IDE and the database is Oracle 11g.</p>