problems with lower() and unicode-databases

postgres 7.4 on linux, glibc 2.2.4-6

I've a table containing unicode-data and the lower()-function does not
work proper. While it lowers standard letters like A->a,B->b ... it
fails on special letters like german umlauts (Ä , Ö ...) that are simply
keeped untouched.

Everything else (sorting etc.) is working fine and LC_COLLATE, LC_CTYPE
and all the other locales were set proper to 'de_AT.UTF-8' (thats how my
mandrake-systems calls the needed locale. On most other systems its
called 'de_AT.utf8') when doing initdb.

The database-encoding is unicode, but I also tried SQL_ASCII (just to
give it a try) and the same problem.

Whats the problem here?

The following output is copied from a unicode-terminal and copied to the
newsreader. It looks fine here, so I think you can all read it.

# select oid,t,lower(t),length(t) from test order by t;
oid | t | lower | length
-------+-------+-------+--------
17257 | a | a | 1
17268 | A | a | 1
17291 | ä | ä | 1
17265 | Ä | Ä | 1
17269 | B | b | 1
17275 | ñ | ñ | 1
17277 | Ñ | Ñ | 1
17262 | ö | ö | 1
17266 | Ö | Ö | 1
17267 | Ü | Ü | 1

# /usr/local/pgsql/bin/pg_controldata /data/postgresql_de/ | grep LC
LC_COLLATE: de_AT.UTF-8
LC_CTYPE: de_AT.UTF-8

I would be very happy to get a "solution", but a workaround would be
better than nothing ;) perl on the same system can read the data from
the database and lowercase the data without any problems, but this is
too much of a *WORK* *AROUND* :)

thnx a lot,
peter

ps: of course upper does not work as well !!
pps: I looked up the changes on newer postgresql-version, but my topic
did not apperar in the list, so I didnt try new 7.4.5. I think its
merely a problem with setting than with postgreSQL. (at least I hope so ...)

--
mag. peter pilsl
goldfisch.at
IT-management
tel +43 699 1 3574035
fax +43 699 4 3574035
pilsl(at)goldfisch(dot)at