function defineConstants() {

        $errorMessage = "<div style='color: #F00; font-weight: bold; "
            . "background-color: #FEB; text-align: center'>"
            . CACHE_PATH
            . " にユーザ書込み権限(777等)を付与して下さい。</div>";

        // 定数を設定
        if (is_file(CACHE_PATH . "mtb_constants.php")) {
            require_once(CACHE_PATH . "mtb_constants.php");
        } elseif (DEFAULT_DSN != "pgsql://nobody:password@localhost:5432/eccubedb") {
            require_once(CLASS_EX_PATH . "db_extends/SC_DB_MasterData_Ex.php");
            require_once(CLASS_EX_PATH . "db_extends/SC_DB_DBFactory_Ex.php");
            require_once(CLASS_PATH . "SC_DbConn.php");

            require_once(CLASS_PATH . "SC_Query.php");
            // 必須なものだけここで無理やり定義する
            define('PEAR_DB_PERSISTENT', false);
            define('MASTER_DATA_DIR', DATA_PATH . "cache/");

            $masterData = new SC_DB_MasterData_Ex();
            $mtb_constants = $masterData->getDBMasterData("mtb_constants");

            $masterData->createCache("mtb_constants", $mtb_constants, true,
                                     array("id", "remarks", "rank"));

            require_once(CACHE_PATH . "mtb_constants.php");

            // キャッシュが無ければ, 初期データからコピー
        } elseif (is_file(CACHE_PATH . "../mtb_constants_init.php")) {

            $mtb_constants = file_get_contents(CACHE_PATH . "../mtb_constants_init.php");
            if (is_writable(CACHE_PATH)) {
                $handle = fopen(CACHE_PATH . "mtb_constants.php", "w");
                if (!$handle) {
                    die($errorMessage);
                }
                if (fwrite($handle, $mtb_constants) === false) {
                    die($errorMessage);
                }
                fclose($handle);

                require_once(CACHE_PATH . "mtb_constants.php");
            } else {
                die($errorMessage);
            }
        } else {
            die(CACHE_PATH . "../mtb_constants_init.php が存在しません");
        }
    }