Hi; I have this command: create table if not exists categoriesRelationships (ID integer auto_increment primary key, Store varchar(60), Parent integer not null, foreign key (Parent) references categories (ID), Child integer not null, foreign key (Child) references categories (ID)) engine=innodb;
show innodb status prints out this: ------------------------ LATEST FOREIGN KEY ERROR ------------------------ 110214 15:03:43 Error in foreign key constraint of table test/categoriesRelationships: foreign key (Parent) references categories (ID), Child integer not null, foreign key (Child) references categories (ID)) 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. mysql> describe categories; +----------+-----------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------+-----------------+------+-----+---------+----------------+ | ID | int(3) unsigned | NO | PRI | NULL | auto_increment | | Store | varchar(60) | YES | | NULL | | | Category | varchar(40) | YES | | NULL | | | Parent | varchar(40) | YES | | NULL | | +----------+-----------------+------+-----+---------+----------------+ 4 rows in set (0.00 sec) Please advise. TIA, Victor
