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-- source include/have_ndb.inc connect (con1,localhost,root,,test); connect (con2,localhost,root,,test); ### ### PK vs PK ### create table parent ( a int primary key auto_increment, b int not null, c int not null, unique(b) using hash, index(c)) engine = ndb; create table child ( a int primary key auto_increment, b int not null, c int not null, unique(b) using hash, index(c)) engine = ndb; alter table child add constraint fkname foreign key (a) references parent(a) on delete restrict on update restrict; insert into parent values (1,1,1); insert into child values (1,1,1); --error 1452 insert into child values (2,2,2); begin; --error 1451 delete from parent; rollback; delete from child; delete from parent; begin; --error 1452 insert into child values (2,2,2); rollback; delete from child; delete from parent; insert into parent values (1,1,1); connection con1; begin; insert into child values (1,1,1); connection con2; begin; --error ER_LOCK_WAIT_TIMEOUT delete from parent; connection con1; commit; connection con2; commit; delete from child; delete from parent; alter table child drop foreign key fkname; ### ### PK vs UK ### alter table child add constraint fkname foreign key (b) references parent(a) on delete restrict on update restrict; insert into parent values (1,1,1); insert into child values (1,1,1); --error 1452 insert into child values (2,2,2); --error 1452 update child set b = 2 where a = 1; begin; --error 1451 delete from parent; rollback; delete from child; delete from parent; begin; --error 1452 insert into child values (2,2,2); rollback; delete from child; delete from parent; insert into parent values (1,1,1); connection con1; begin; insert into child values (1,1,1); connection con2; begin; --error ER_LOCK_WAIT_TIMEOUT delete from parent; connection con1; commit; connection con2; commit; delete from child; delete from parent; alter table child drop foreign key fkname; ### ### UK vs PK ### alter table child add constraint fkname foreign key (a) references parent(b) on delete restrict on update restrict; insert into parent values (1,1,1); insert into child values (1,1,1); --error 1452 insert into child values (2,2,2); --error 1451 update parent set b = 2 where a = 1; begin; --error 1451 delete from parent; rollback; delete from child; delete from parent; begin; --error 1452 insert into child values (2,2,2); rollback; delete from child; delete from parent; insert into parent values (1,1,1); connection con1; begin; insert into child values (1,1,1); connection con2; begin; --error ER_LOCK_WAIT_TIMEOUT delete from parent; connection con1; commit; connection con2; commit; delete from child; delete from parent; alter table child drop foreign key fkname; ### ### UK vs UK ### alter table child add constraint fkname foreign key (b) references parent(b) on delete restrict on update restrict; insert into parent values (1,1,1); insert into child values (1,1,1); --error 1452 update child set b = 2 where a = 1; --error 1452 insert into child values (2,2,2); --error 1451 update parent set b = 2 where a = 1; begin; --error 1451 delete from parent; rollback; delete from child; delete from parent; begin; --error 1452 insert into child values (2,2,2); rollback; delete from child; delete from parent; insert into parent values (1,1,1); connection con1; begin; insert into child values (1,1,1); connection con2; begin; --error ER_LOCK_WAIT_TIMEOUT delete from parent; connection con1; commit; connection con2; commit; delete from child; delete from parent; alter table child drop foreign key fkname; ### ### PK vs OI ### alter table child add constraint fkname foreign key (c) references parent(a) on delete restrict on update restrict; insert into parent values (1,1,1); insert into child values (1,1,1); --error 1452 update child set c = 2 where a = 1; --error 1452 insert into child values (2,2,2); begin; --error 1451 delete from parent; rollback; delete from child; delete from parent; begin; --error 1452 insert into child values (2,2,2); rollback; delete from child; delete from parent; insert into parent values (1,1,1); connection con1; begin; insert into child values (1,1,1); connection con2; begin; --error ER_LOCK_WAIT_TIMEOUT delete from parent; connection con1; commit; connection con2; commit; delete from child; delete from parent; alter table child drop foreign key fkname; ### ### UK vs OI ### alter table child add constraint fkname foreign key (c) references parent(b) on delete restrict on update restrict; insert into parent values (1,1,1); insert into child values (1,1,1); --error 1452 update child set c = 2 where a = 1; --error 1452 insert into child values (2,2,2); --error 1451 update parent set b = 2 where a = 1; begin; --error 1451 delete from parent; rollback; delete from child; delete from parent; begin; --error 1452 insert into child values (2,2,2); rollback; delete from child; delete from parent; insert into parent values (1,1,1); connection con1; begin; insert into child values (1,1,1); connection con2; begin; --error ER_LOCK_WAIT_TIMEOUT delete from parent; connection con1; commit; connection con2; commit; delete from child; delete from parent; alter table child drop foreign key fkname; drop table parent, child;