MySQL VARCHAR(255) UTF8 is too long for key, but max length is 1000 bytes

Question

I know there have been plenty of questions about this, but I think my math is right.

• MySQL reserves 3 bytes per UTF8 character.
• MyISAM allows keys of leng

Answer 1

Anyone who does need a larger key length should look at innodb_large_prefix

visit http://dev.mysql.com/doc/refman/5.5/en/innodb-parameters.html#sysvar_innodb_large_prefix