title: sphinx search field weights
body: <p>I am getting a syntax error on my query in my .conf file
  Everything worked great until I added the OPTION field_weights. What am I doing wrong for defining my field weights?</p>
  
  <p>here is the query for my sphinx index</p>
  
  <pre><code>source tx3nh_users : src {
  
      sql_query_range = SELECT MIN(id), MAX(id) FROM tx3nh_users
      sql_query = SELECT u.id, p.fullname, p.email, s.staff_title, s.bio FROM tx3nh_users AS u LEFT JOIN tx3nh_user_attributes AS p ON u.id=p.internalKey LEFT JOIN oxv5v_su_staff AS s ON u.id=s.user_id WHERE u.id&gt;=$start AND u.id&lt;=$end OPTION field_weights=(p.fullname=3, s.staff_title=2, s.bio=1)
  
  }
  </code></pre>