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case insensitive search with greek characters

Hi all,

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

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

if i change the query to

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

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

An suggestions?

Thanks,
Gvre
Nov 23 '05 #1
4 2360
Giannis Vrentzos <gv**@NOSPAM.gvre.gr> writes:
... everything is fine. As you can see the problem is at char α .
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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Nov 23 '05 #2
Giannis Vrentzos wrote:
I 'm testing postgres 8.0 beta 1 an i have the following problem. I
have a field with value Γιάννης. If i execute the following query it
does not returns any rows.

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

if i change the query to

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

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


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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http://archives.postgresql.org

Nov 23 '05 #3
Tom Lane wrote:
Giannis Vrentzos <gv**@NOSPAM.gvre.gr> writes:
... everything is fine. As you can see the problem is at char α .
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 (α) and
(ά). I executed show lc_ctype and show lc_collate and postgres returned
'Greek_Greece.1253' 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
Nov 23 '05 #4
Tom Lane wrote:
Giannis Vrentzos <gv**@NOSPAM.gvre.gr> writes:
... everything is fine. As you can see the problem is at char α .
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 (α) and
(ά). I executed show lc_ctype and show lc_collate and postgres returned
'Greek_Greece.1253' 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
Nov 23 '05 #5

This discussion thread is closed

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