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Fixed #22458 -- Added a note about MySQL utf8_unicode_ci collation

Thanks tobami at gmail.com for the report.
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commit 11ac50b18e578498c1d95e0a75921b5864387d46 1 parent b43bbd6
@mmardini mmardini authored timgraham committed
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  1. +9 −0 docs/ref/databases.txt
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9 docs/ref/databases.txt
@@ -363,6 +363,15 @@ table (usually called ``django_session``) and the
.. _fixed in MySQLdb 1.2.2: http://sourceforge.net/tracker/index.php?func=detail&aid=1495765&group_id=22307&atid=374932
+Please note that according to `MySQL Unicode Character Sets`_, comparisons for
+the ``utf8_general_ci`` collation are faster, but slightly less correct, than
+comparisons for ``utf8_unicode_ci``. If this is acceptable for your application,
+you should use ``utf8_general_ci`` because it is faster. If this is not acceptable
+(for example, if you require German dictionary order), use ``utf8_unicode_ci``
+because it is more accurate.
+
+.. _MySQL Unicode Character Sets: http://dev.mysql.com/doc/refman/5.7/en/charset-unicode-sets.html
+
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