public function select($sql) {

   $hRes = @pg_query($this->hConn, $sql);
   if(! is_resource($hRes)) {
      $err = pg_last_error($this->hConn);
      throw new Exception($err);
   }

   $arReturn = array();
   while( ($row = pg_fetch_assoc($hRes)) ) {
      $arReturn[] = $row;
   }

   return $arReturn;
}