Mine

SQL query:

CREATE TABLE `wiki_categorylinks` (
cl_from int( 8 ) unsigned NOT NULL default '0',
cl_to varchar( 255 ) binary NOT NULL default '',
cl_sortkey varchar( 86 ) binary NOT NULL default '',
cl_timestamp timestamp NOT NULL ,
UNIQUE KEY cl_from( cl_from, cl_to ) ,
KEY cl_sortkey( cl_to, cl_sortkey ) ,
KEY cl_timestamp( cl_to, cl_timestamp )
) TYPE = MYISAM

MySQL said: Documentation
#1071 - Specified key was too long; max key length is 1000 bytes