Mysql无法创建外键的原因汇总_查看MySQL创建外键约束失败详细原因的方法

以下是引用片段：

LATEST FOREIGN KEY ERROR

————————

081210 11:57:40 Error in foreign key constraint of table dbname/tablename:

foreign key (`gid`, `uid`) references `table2`(`gid`, `uid`)

) ENGINE = InnoDB:

Cannot find an index in the referenced table where the

referenced columns appear as the first columns, or column types

in the table and the referenced table do not match for constraint.

Note that the internal storage type of ENUM and SET changed in

tables created with >= InnoDB-4.1.12, and such columns in old tables

cannot be referenced by such columns in new tables.

See http://dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-constraints.html

for correct foreign key definition.