function _insertid()
 {
     $sqlca = ifx_getsqlca($this->lastQuery);
     return @$sqlca["sqlerrd1"];
 }

 /**
  * Devuelve el ultimo id autonumerico generado en la BD
  *
  * @return int
  */
 public function last_insert_id($table = '', $primary_key = '')
 {
     $sqlca = ifx_getsqlca($this->last_result_query);
     return $sqlca["sqlerrd1"];
 }

 /**
  * Devuelve el ultimo id autonumerico generado en la BD
  *
  * @return int
  */
 public function last_insert_id($table = '', $primary_key = '')
 {
     if (!$this->id_connection) {
         return false;
     }
     $sqlca = ifx_getsqlca($this->last_result_query);
     return $sqlca["sqlerrd1"];
 }

 function GetSequenceNextValue($name, &$value)
 {
     if (!($result = $this->DoQuery("INSERT INTO _sequence_{$name} (sequence) VALUES (0)", 0, 0, 0))) {
         return 0;
     }
     if (isset($this->options["Use8ByteIntegers"]) && $this->options["Use8ByteIntegers"]) {
         ifx_free_result($result);
         if (!($result = $this->DoQuery("SELECT dbinfo('serial8') FROM _sequence_{$name}"))) {
             return 0;
         }
         $value = intval($this->FetchResult($result, 0, 0));
         $this->FreeResult($result);
         if ($this->auto_commit && isset($this->options["Logging"]) && !strcmp($this->options["Logging"], "ANSI") && !$this->DoQuery("COMMIT")) {
             return 0;
         }
     } else {
         $sqlca = ifx_getsqlca($result);
         $value = $sqlca["sqlerrd1"];
         ifx_free_result($result);
     }
     if (!$this->Query("DELETE FROM _sequence_{$name} WHERE sequence<{$value}")) {
         $this->warning = "could delete previous sequence table values";
     }
     return 1;
 }