title: why does not a placeholder inside a method in insert sql work?
body: <p>In my case, </p>
  
  <pre><code>INSERT INTO xmltable (id, xml_content) 
  VALUES (?,XMLPARSE(DOCUMENT '&lt;?xml version=\"1.0\" encoding=\"UTF-8\"?&gt;&lt;mail&gt;&lt;from&gt;abc&lt;/from&gt;&lt;to&gt;xyz&lt;/to&gt;&lt;/mail&gt;' PRESERVE WHITESPACE))
  </code></pre>
  
  <p>is working fine, but</p>
  
  <pre><code>INSERT INTO xmltable (id, xml_content) 
  VALUES (?,XMLPARSE(DOCUMENT ? PRESERVE WHITESPACE)) 
  </code></pre>
  
  <p>is not.</p>