/**
  * @author Matthew McNaney
  * @author Hilmar
  */
 public static function prefixQuery($sql)
 {
     if (!$GLOBALS['PHPWS_DB']['tbl_prefix']) {
         return $sql;
     }
     $tables = PHPWS_DB::pullTables($sql);
     if (empty($tables)) {
         return $sql;
     }
     foreach ($tables as $tbl) {
         $tbl = trim($tbl);
         $sql = PHPWS_DB::prefixVary($sql, $tbl);
     }
     return $sql;
 }