The following bug has been logged online:

Bug reference:      1069
Logged by:          Interzone

Email address:      [EMAIL PROTECTED]

PostgreSQL version: 7.4

Operating system:   Linux 2.4.24

Description:        functions "lower()" and "upper()" not characterset-aware

Details: 

the functions "lower()" and "upper()" do not seem to work correctly with 
ISO_8859_7 values 

Test case:
CREATE DATABASE mediagrk WITH TEMPLATE = template0 ENCODING = 'ISO_8859_7';
CREATE TABLE test1 (
   code serial NOT NULL,
   compname character varying(100) NOT NULL
);
INSERT INTO test1 VALUES (1, 'ΕΛΛΗΝΙΚΑ');
SELECT lower(compname) from test1;

if there is a problem (there might be) with the greek characters above, just 
remember that this is a iso-8859-7 encoded text (and I changed the encoding 
of the form-page to iso-8859-7 before sending). 



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