Document precedence of FTS operators in tsquery

Oleg Bartunov

doc/src/sgml/textsearch.sgml

@@ -358,14 +358,18 @@ SELECT to_tsvector('error is not fatal') @@ to_tsquery('fatal <-> error');
 SELECT phraseto_tsquery('cats ate rats');
        phraseto_tsquery        
 -------------------------------
- ( 'cat' <-> 'ate' ) <-> 'rat'
+ 'cat' <-> 'ate' <-> 'rat'
 
 SELECT phraseto_tsquery('the cats ate the rats');
        phraseto_tsquery        
 -------------------------------
- ( 'cat' <-> 'ate' ) <2> 'rat'
+ 'cat' <-> 'ate' <2> 'rat'
 </programlisting>
    </para>
+   <para>
+     The precedence of tsquery operators is as follows: <literal>|</literal>, <literal>&amp;</literal>, 
+     <literal>&lt;-&gt;</literal>, <literal>!</literal>.
+   </para>
   </sect2>
 
   <sect2 id="textsearch-intro-configurations">
@@ -923,7 +927,7 @@ SELECT phraseto_tsquery('english', 'The Fat Rats');
 SELECT phraseto_tsquery('english', 'The Fat &amp; Rats:C');
       phraseto_tsquery
 -----------------------------
- ( 'fat' &lt;-&gt; 'rat' ) &lt;-&gt; 'c'
+ 'fat' &lt;-&gt; 'rat' &lt;-&gt; 'c'
 </screen>
    </para>