Problems with case-insensitive comparing of national characters
Posted by: Bjarne Betjent
Date: May 04, 2005 06:36AM

Hi

I have a major problem concerning searching for text containing norwegian special characters. I run mysql 4.0.12 on OS X. The default char set is latin1.

Suppose now I have a field containing the word 'Ørret'. If I do a search like "WHERE field LIKE '%Ørret%'" I will find this column. So is the case if I search with "WHERE field LIKE '%ØrrET%' " since the LIKE operator in mysql is not case sensitive as long as none of the operands is a binary string. (The field in question is a varchar field)

But as soon as I replace the letter 'Ø' with the lowercase 'ø' in the search it does not work any longer. It seems to me that the case insensitivity only goes for letters a-z/A-Z.

I found the same problem using the UPPER() function:

mysql > SELECT UPPER('test æøå');

+---------------------+
| UPPER('test æøå') |
+---------------------+
| TEST æøå |
+---------------------+

The three norwegian characters at the end is not transformed to the uppercase 'ÆØÅ' as I would expect.

Does anyone here know what the problem is, and how I can fix this?

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Problems with case-insensitive comparing of national characters
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