Re: case insensitive regex clause with some latin1 characters

My environment setup as:

show lc_ctype;
lc_ctype
-------------
fr_CA.UTF-8
(1 row)

fis=> SELECT 'Ä' ~* 'ä';
?column?
----------
f
(1 row)

fis=> SELECT 'Ä' ilike 'ä';
?column?
----------
f
(1 row)

I got the same result: false

> "=?ISO-8859-1?Q?Ragnar_=D6sterlund?=" <ragoster(at)gmail(dot)com> writes:
>> I'm not sure if this is a bug or if I'm doing something wrong. I have
>> a database encoded with ISO-8859-1, aka LATIN1. When I do something
>> like:
>
>> SELECT 'Ä' ~* 'ä';
>
>> it returns false.
>
> Check the database's locale setting (LC_CTYPE). It has to be one that
> expects LATIN1 encoding.
>
> The current regex code is generally not able to deal with locale-specific
> behaviors in UTF8 encoding, but it should work for single-byte encodings
> as long as you've got the locale setting right.
>
> regards, tom lane
>
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