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Editorial Team
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Asked: 2026-05-16T09:04:57+00:00

I have noticed a problem with non-english (polish) characters using MySQL. query select ‘abcde’=’ąbćdę’

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I have noticed a problem with “non-english” (polish) characters using MySQL.

query “select ‘abcde’=’ąbćdę'” returns “1” and the strings are not equals …

could you help me ? 🙂 thx!!!

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  1. Editorial Team

    For utf8_general_ci they are equal (with the exception of ł, which is not considered a bug by MySQL), and since 5.6 you can also use utf8_unicode_520_ci which handles all Polish characters correctly. Use utf8_polish_ci to treat accented and unaccented characters as different.

    select 'abcde'='ąbćdę' COLLATE utf8_polish_ci
>> 0

    Demo of ‘not a bug’

    select 'abcde'='ąbćdę' COLLATE utf8_general_ci
>> 1

select 'abcdel'='ąbćdęł' COLLATE utf8_general_ci
>> 0

    See the bug report here: http://bugs.mysql.com/bug.php?id=9604

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