title: Invoking a PL/SQL function from EclipseLink
body: <p>I'm trying to execute a PL/SQL function in EclipseLink which uses Oracle Specific types(eg. Boolean).</p>
  
  <p>I've tried using PLSQLStoredProcedureCall which complains that I'm not executing a procedure and I have tried using StoredFunctionCall but that returns</p>
  
  <pre><code>PLS-00382: expression is of wrong type
  </code></pre>
  
  <p>Has anyone developed a solution to invoke functions in EclipseLink with Oracle Types?  I have heard that it would be possible to extend StoredFunctionCall but I'd rather leverage existing functionality as much as possible.</p>