Collation bug in MySQL 4.1.6 ?
Posted by: Petr Parik
Date: March 13, 2006 05:01PM

Hi,

I use cp1250 character set and there seems to be an error in how MySQL treats Czech character Ř (R with wedge). Characters as Á (A-stroke) É (E-stroke) Ň (N-wedge) etc. are treated as equal characters to the "base" character A/E/N/etc., whereas Č (C-wedge) Š (S-wedge) Ž (Z-wedge) etc. are treated as distinct characters from base characters C/S/Z/etc. R-wedge belongs to the latter group, however in MySQL it is implemented as the former, which is obviously a mistake (all other characters are implemented correctly).

You can see that because of this queries like "SELECT FROM table WHERE str LIKE 'r%'" can return unwanted rows. Is this corrected in newer versions ?

Petr Parik

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Collation bug in MySQL 4.1.6 ?
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