title: Sphinxql: several fields matching
body: <p>String with author and his book is given. There are two fields in index: <code>author</code> and <code>title</code>. I need to find all books where author and title matches.
  String may contain only author or only title, so I can't parse it. If I search</p>
  
  <pre><code>SELECT id FROM books 
  WHERE MATCH('@(author, title) "jane smiley horse heaven");
  </code></pre>
  
  <p>, I don't get the most relevant book with author="jane smiley" and title="horse heaven".</p>
  
  <p>I need something like</p>
  
  <pre><code>SELECT id FROM books
  WHERE MATCH('@(title) "horse heaven" @(author) "jane smiley"');
  </code></pre>
  
  <p>but without splitting the string.</p>
  
  <p>Is it possible?</p>