lt', 'searching|sentence');
              to_tsquery
        ----------------------
         'search' | 'sentenc'
        (1 row)
</pre>
<p>Notice that the words are separated by the boolean logic "OR",
the text could contain boolean operators &amp;,|,!,() with their
usual meaning.</p>

<p>You can not use words defined as being a stop word in your
configuration. The function will not fail ... you will just get no
result, and a NOTICE like this:</p>
<pre>
        SELECT to_tsquery('default', 'a|is&amp;not|!t