case 'PRIMARY KEY':
                $constraints[trim($row->TNAME)][trim($row->SENAME)]['primary'] = $cname;
                $s_primaries[$cname]['index'] = trim($row->INAME);
                $s_primaries[$cname]['cols'] = isset($s_primaries[$cname]['cols']) ? $s_primaries[$cname]['cols']++ : 1;
                break;