Advanced search specifically for terms should also work with synonyms

Well it would be nice to implement an overwrite of the taxonomy autocomlete function into this module. Here I just changed the sql query.

So if a synonym is search by the autocomplete the original term will be suggested.

/**
 * Helper function for autocompletion
 */
function taxonomy_autocomplete($vid, $string = '') {
  // The user enters a comma-separated list of tags. We only autocomplete the last tag.
  $array = drupal_explode_tags($string);

  // Fetch last tag
  $last_string = trim(array_pop($array));
  $matches = array();
  if ($last_string != '') {
    $result = db_query_range(db_rewrite_sql("SELECT t.tid, t.name FROM {term_data} t 
       LEFT JOIN {term_synonym} ts  ON t.tid = ts.tid 
       WHERE t.vid = %d 
	   AND ((LOWER(t.name) LIKE LOWER('%%%s%%')) OR (LOWER(ts.name) LIKE LOWER('%%%s%%')))", 't', 'tid'), 
	   $vid, $last_string,  $last_string, 0, 10);

    $prefix = count($array) ? implode(', ', $array) .', ' : '';

    while ($tag = db_fetch_object($result)) {
      $n = $tag->name;
      // Commas and quotes in terms are special cases, so encode 'em.
      if (strpos($tag->name, ',') !== FALSE || strpos($tag->name, '"') !== FALSE) {
        $n = '"'. str_replace('"', '""', $tag->name) .'"';
      }
      $matches[$prefix . $n] = check_plain($tag->name);
    }
  }

  drupal_json($matches);
}

I am going to close this issue since it's about D6.