case insensitive search with greek characters

[Giannis Vrentzos]

Hi all,

I 'm testing postgres 8.0 beta 1 an i have the following problem. I have
a field with value ÃéÜííçò. If i execute the following query it does not
returns any rows.

select * from test where descr ilike '%ãéáííçò%'

if i change the query to

select * from test where descr ilike '%ãéÜííçò%'

everything is fine. As you can see the problem is at char á .
I 'm using ENCODING = 'ISO_8859_7'. I also tried with unicode but no luck.

An suggestions?

Thanks,
Gvre

[Tom Lane]

Giannis Vrentzos <gv**@NOSPAM.gv re.gr> writes:

... everything is fine. As you can see the problem is at char á .
I 'm using ENCODING = 'ISO_8859_7'. I also tried with unicode but no luck.

upper/lower casing behavior depends on locale, not encoding (though you
also need to be sure your encoding is what the selected locale expects).
I suspect you initdb'd with the wrong locale environment settings.
Check by doing
show lc_ctype;
show lc_collate;
If it's not the right thing then you'll need to re-initdb :-(

regards, tom lane

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[Peter Eisentraut]

Giannis Vrentzos wrote:

I 'm testing postgres 8.0 beta 1 an i have the following problem. I
have a field with value ÃéÜííçò. If i execute the following query it
does not returns any rows.

select * from test where descr ilike '%ãéáííçò%'

if i change the query to

select * from test where descr ilike '%ãéÜííçò%'

everything is fine. As you can see the problem is at char á .

As far as I can see, this is correct, because the pattern in the second
query indeed does match you value whereas the first doesn't. Did you
expect ilike to be accent-insensitive? It is not.

--
Peter Eisentraut
http://developer.postgresql.org/~petere/
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[Giannis Vrentzos]

Tom Lane wrote:

Giannis Vrentzos <gv**@NOSPAM.gv re.gr> writes:

... everything is fine. As you can see the problem is at char á .
I 'm using ENCODING = 'ISO_8859_7'. I also tried with unicode but no luck.

upper/lower casing behavior depends on locale, not encoding (though you
also need to be sure your encoding is what the selected locale expects).
I suspect you initdb'd with the wrong locale environment settings.
Check by doing
show lc_ctype;
show lc_collate;
If it's not the right thing then you'll need to re-initdb :-(

The problem is not with upper-lower case but with one letter (á) and
(Ü). I executed show lc_ctype and show lc_collate and postgres returned
'Greek_Greece.1 253' and i cannot find an encode like this in postgres. I
also don't want to change the encoding every time i change the db server
machine.

Thanks for responding,
Gvre

[Giannis Vrentzos]

Tom Lane wrote:

Giannis Vrentzos <gv**@NOSPAM.gv re.gr> writes:

... everything is fine. As you can see the problem is at char á .
I 'm using ENCODING = 'ISO_8859_7'. I also tried with unicode but no luck.

upper/lower casing behavior depends on locale, not encoding (though you
also need to be sure your encoding is what the selected locale expects).
I suspect you initdb'd with the wrong locale environment settings.
Check by doing
show lc_ctype;
show lc_collate;
If it's not the right thing then you'll need to re-initdb :-(

The problem is not with upper-lower case but with one letter (á) and
(Ü). I executed show lc_ctype and show lc_collate and postgres returned
'Greek_Greece.1 253' and i cannot find an encode like this in postgres. I
also don't want to change the encoding every time i change the db server
machine.

Thanks for responding,
Gvre