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 (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`c`,`a`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
insert into child values (1,1,1);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`c`,`a`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
insert into child values (2,1,1);
delete from parent;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`c`,`a`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
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 (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`b`,`a`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
insert into child values (2,3,1);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`b`,`a`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
insert into child values (2,1,1);
delete from parent;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`b`,`a`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
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 (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`c`,`b`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
insert into child values (2,3,1);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`c`,`b`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
insert into child values (2,2,1);
delete from parent;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `fkname` FOREIGN KEY (`c`,`b`) REFERENCES `parent` (`a`,`b`) ON DELETE RESTRICT ON UPDATE RESTRICT)
drop table child, parent;
#
# Bug#21664899 : FAILURE CREATING COMPOSITE FKS REFERENCING COMPOSITE PKS OF PARENT
#
#create table t1
create table t1 (
a int not null,
b int not null,
c int not null,
primary key pk1(a,b)
) engine=ndbcluster;
#create t2 with a unique key on single column
create table t2 (
a int not null,
b int not null,
c int not null,
unique key uniquet2a(a),
constraint fkt2ab foreign key (a,b) references t1(a,b)
) engine=ndbcluster;
#verify the presence of uniquet2a, fkt2ab & and an extra key for fkt2ab
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  UNIQUE KEY `uniquet2a` (`a`),
  KEY `fkt2ab` (`a`,`b`),
  CONSTRAINT `fkt2ab` FOREIGN KEY (`a`,`b`) REFERENCES `t1` (`a`,`b`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
alter table t2 drop key uniquet2a;
#alter add a unique constraint on single key
alter table t2 add constraint uniquet2a unique (a);
#verify the presence of uniquet2a, fkt2ab & and an extra key for fkt2ab
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  UNIQUE KEY `uniquet2a` (`a`),
  KEY `fkt2ab` (`a`,`b`),
  CONSTRAINT `fkt2ab` FOREIGN KEY (`a`,`b`) REFERENCES `t1` (`a`,`b`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#alter add a unique constraint on all cols in fk
alter table t2 add constraint uniquet2ab unique (a,b);
#verify the presence of uniquet2a, uniquet2ab, fkt2ab. no extra key for fkt2ab
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  UNIQUE KEY `uniquet2a` (`a`),
  UNIQUE KEY `uniquet2ab` (`a`,`b`),
  CONSTRAINT `fkt2ab` FOREIGN KEY (`a`,`b`) REFERENCES `t1` (`a`,`b`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#try adding fk(a,b,c) referring t1(a,b,c), it should fail without parent index.
alter table t2 add constraint fkt2abc foreign key (a,b,c) references t1(a,b,c);
ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 'fkt2abc' in the referenced table 't1'
#now add a unique key but on a different column order and try again
alter table t1 add constraint uniquet1abc unique (c,a,b);
alter table t2 add constraint fkt2abc foreign key (a,b,c) references t1(a,b,c);
#verify the presence of new fk
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  UNIQUE KEY `uniquet2a` (`a`),
  UNIQUE KEY `uniquet2ab` (`a`,`b`),
  KEY `fkt2abc` (`a`,`b`,`c`),
  CONSTRAINT `fkt2ab` FOREIGN KEY (`a`,`b`) REFERENCES `t1` (`a`,`b`) ON DELETE NO ACTION ON UPDATE NO ACTION,
  CONSTRAINT `fkt2abc` FOREIGN KEY (`a`,`b`,`c`) REFERENCES `t1` (`a`,`b`,`c`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
#cleanup
drop table t2, t1;