to_ascii()

 to_ascii( text )

    - encode 'text' from database encoding to ASCII

    to_ascii('\256\341k')


 to_ascii( text, int4 )

    - encode 'text' from 'int4' encoding to ASCII

       to_ascii('\256\341k', 8)


 to_ascii( text, name )

    - encode 'text' from 'name' encoding to ASCII

      to_ascii('\256\341k', 'LATIN2')


  Now is supported LATIN1, LATIN2, WIN1250. For other character sets I
haven't good resources. Add new encoding is easy...

 If encoding is not supported returns ERROR.

 Note --- not exists total corect conversion to ASCII, this function try
    convert chars those is _probably_ interpret-able in ASCII for
    others use ' '. But for example for all Czech characters it is
    sufficient ... hmm Chinese / JAP and other complicated langs have
    bad luck here :-(

                        Karel