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ndb
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View File Name :
ndb_fk_multi_column.result
create table parent ( a int not null, b int not null, c int not null, primary key (a,b), unique(b,c) using hash, index(c,a)) engine = ndb; create table child ( a int not null, b int not null, c int not null, primary key (b,a), unique(c,b) using hash, index(c,a)) engine = ndb; insert into parent values (1,2,3); alter table child add constraint fkname foreign key (c,a) references parent(a,b) on delete restrict on update restrict; insert into child values (2,1,2); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code) insert into child values (1,1,1); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code) insert into child values (2,1,1); delete from parent; ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (Unknown error code) delete from child; alter table child drop foreign key fkname; alter table child add constraint fkname foreign key (b,a) references parent(a,b) on delete restrict on update restrict; insert into child values (1,2,2); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code) insert into child values (2,3,1); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code) insert into child values (2,1,1); delete from parent; ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (Unknown error code) delete from child; alter table child drop foreign key fkname; alter table child add constraint fkname foreign key (c,b) references parent(a,b) on delete restrict on update restrict; insert into child values (1,2,2); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code) insert into child values (2,3,1); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code) insert into child values (2,2,1); delete from parent; ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (Unknown error code) drop table child, parent;