I tried to change collation MySQL table to utf8_general_cs but got following error:

mysql> ALTER TABLE table_name CONVERT TO CHARACTER SET utf8 COLLATE 'utf8_general_cs';
ERROR 1273 (HY000): Unknown collation: 'utf8_general_cs'

I run "SHOW COLLATE" command and "utf8_general_cs" is not in the results.

What can I do now?


MySQL doesn't have case-sensitive Unicode collations, because it's a difficult problem. Some languages collate lower-case before upper-case, and others collate upper-case before lower-case. SQL Server tries to do case-sensitive Unicode, taking locale into consideration.

You have a couple of choices:

  • It's interesting how case-sensitive is a difficult problem. If you asked me to guess, I would take a shot that case-insensitive is a more difficult problem to solve. Can you elaborate on that a little? – Robo Robok Dec 13 '18 at 23:03
  • The next sentence describes the problem. IBM has a series of pages about "language-aware collation." Case-insensitive is super easy, because it doesn't matter how the language sorts different cases. – David M Dec 21 '18 at 19:08
  • I still don't understand. Languages sort characters by accents, not by case. – Robo Robok Dec 21 '18 at 19:13

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