Hello everybody,
I’m not sure if this is a bug on the upper/lower command or anywhere else.
This is the problem:
I have a DB that uses ‘UNICODE’ encoding. PostgreSQL version is 7.4.2.
I have a field that holds characters, including characters like ‘Ñ’ (lowercase version is ‘ñ’). The name of the field is ‘ccaa_ds_ccaa’ (table name is ‘ccaa’).
When I execute the following SQL statement:
select * from ccaa where ccaa_ds_ccaa like '%Ñ%'
.. it returns one record (that’s the correct result). There is only one record that matches this criteria (the actual value is ‘CATALUÑA’).
However, if I execute this one:
select * from ccaa where lower(ccaa_ds_ccaa) like '%Ñ%'
… it returns the very same record, which is WRONG, since the “lower” should make that query return no matching records.
Similarly, I tried this:
select * from ccaa where upper(ccaa_ds_ccaa) like upper(%ñ%')
… and IT DOES NOT RETURN ANY MATCHING RECORDS (it should return the same record return by the previous query).
It seems like the upper / lower commands do not work properly on UNICODE.
I tested this using ‘LATIN9’ encoding an it works properly in all cases.
Is this a known bug? Is there a bug fix for it? Where can I find it?
What effect does using UNICODE / LATIN9 on BLOB fields (bytea)? (I believe there are issues with the JDBC drivers)
Regards,
Freddy.