Install PostgreSQL 9.0.4 on Windows silently

I have previously installed PostgreSQL 8.4 with below command through inno set up file.

postgresql.exe --mode unattended --unattendedmodeui minimal --superpassword admin@123 --prefix "c:\iview\postgres" --datadir "c:\iview\postgres\data" --install_plpgsql 1 --create_shortcuts 0 '

Now, I want to install OostgreSQL 9.0.4 through above command but it shows an error:

option datadir,install_pl开发者_开发百科pgsql invalid please see the help.

Which option should be passed for PostgreSQL 9.0.4 to install it properly from the command line?

---

Check installer's --help switch to get all available options, e.g.:

postgresql-9.0.4-1-windows_x64.exe --help

As I checked there is no --install_plpgsql switch available as in earlier version (postgresql-8.4.8-1-windows.exe):

 --install_plpgsql  Install pl/pgsql in template1 database?
                                Default: 1

However if you want --install_plpgsql 1, then you can just skip that switch, because PL/pgSQL language is installed by default:

SELECT lanname FROM pg_language WHERE lanname LIKE 'plpgsql';
 lanname
---------
 plpgsql
(1 row)