Bug #425: Upper(), Lower() bug

Dmitry Bezgodov (dimabezg(at)europe(dot)com) reports a bug with a severity of 2
The lower the number the more severe it is.

Short Description
Upper(), Lower() bug

Long Description
The functions Lower amd Upper doesn't work with cyrillic, but
works fine with latin (a-z A-Z).

Tested on psql (PostgreSQL) 7.1.3 with
PostgreSQL 7.1.3 on i686-pc-cygwin, compiled by GCC 2.95.3-5.
System: MS Windows 98 2nd russian edition.
I tryed work via PostgreSQL ODBC 7.01.00.06 in pgAdmin and Active Perl 5.6 DBD-ODBC - it was the same result.
Regards,
Dmitry Bezgodov

Sample Code

$psql --version
psql (PostgreSQL) 7.1.3
contains readline, history, multibyte support
Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
Portions Copyright (c) 1996 Regents of the University of California
Read the file COPYRIGHT or use the command \copyright to see the
usage and distribution terms.

$createdb -T template1 -E LATIN5 -U DMYL -W ldb

$psql -l
List of databases
Database | Owner | Encoding
-----------+-------+----------
ldb | DMYL | LATIN5
template0 | DMYL | LATIN5
template1 | DMYL | LATIN5
(3 rows)

$psql -c 'SELECT VERSION()' ldb
version
--------------------------------------------------------------
PostgreSQL 7.1.3 on i686-pc-cygwin, compiled by GCC 2.95.3-5
(1 row)
=== Some code
SET CLIENT_ENCODING TO 'WIN'
-- WIN is shortcut of Windows 1251 codepage ( Windows Cyrillic )

CREATE TABLE mytable (
id int4 primary key,
name varchar(80) not null)

INSERT INTO product VALUES(
1,
'Windows cp1251 encoding cyrillic text')

SELECT name, Upper(name), Lower(name) from mytable
-- Output of those fields are equal, Lower and Upper functions don't
-- change a value of field 'name'.

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