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drop table if exists t2, t1;
# bug#14095785
create table t1 (
a int not null,
b int not null,
primary key using hash (a),
unique key using hash (b)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2
add constraint foreign key (b) references t1 (b);
alter table t2
drop foreign key;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 2
drop table t2, t1;
# bug#14095838
create table t1 (
a int not null,
primary key using hash (a)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2
add constraint fk1 foreign key (b) references t1 (a)
on delete cascade on update cascade;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21000 'Create foreign key failed - parent key is primary key and on-update-cascade is not allowed' from NDB
Error 1215 Cannot add foreign key constraint
alter table t2
add constraint fk1 foreign key (b) references t1 (a)
on delete cascade on update restrict;
drop table t2, t1;
# bug#14195170
CREATE TABLE customer (id INT NOT NULL, PRIMARY KEY (id)) ENGINE=NDB;
CREATE TABLE product (category INT NOT NULL, id INT NOT NULL,
price DECIMAL, PRIMARY KEY(category, id)) ENGINE=NDB;
CREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT, product_category INT NOT NULL, product_id INT NOT NULL, customer_id INT NOT NULL, PRIMARY KEY(no), INDEX (product_category, product_id), FOREIGN KEY (product_category, product_id) REFERENCES product(category, id) ON UPDATE CASCADE ON DELETE RESTRICT, INDEX (customer_id), FOREIGN KEY (customer_id) REFERENCES customer(id)) ENGINE=ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21000 'Create foreign key failed - parent key is primary key and on-update-cascade is not allowed' from NDB
Error 1215 Cannot add foreign key constraint
CREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT, product_category INT NOT NULL, product_id INT NOT NULL, customer_id INT NOT NULL, PRIMARY KEY(no), INDEX (product_category, product_id), FOREIGN KEY (product_category, product_id) REFERENCES product(category, id) ON UPDATE CASCADE ON DELETE RESTRICT, INDEX (customer_id), FOREIGN KEY (customer_id) REFERENCES customer(id)) ENGINE=ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21000 'Create foreign key failed - parent key is primary key and on-update-cascade is not allowed' from NDB
Error 1215 Cannot add foreign key constraint
DROP TABLE customer, product;
# bug#14124623
CREATE TABLE counties (county VARCHAR(30) NOT NULL PRIMARY KEY,
country VARCHAR(30), INDEX county_country_index(country)) ENGINE=ndb;
INSERT INTO counties VALUES
('Berkshire','England'),('Shropshire','England'),('Oxfordshire','England'),('Buckinghamshire','England');
CREATE TABLE towns (town VARCHAR(30) NOT NULL PRIMARY KEY, county
VARCHAR(30), INDEX county_county_index (county), CONSTRAINT county_town
FOREIGN KEY (county) REFERENCES counties(county) ON DELETE RESTRICT ON UPDATE
RESTRICT) ENGINE=ndb;
INSERT INTO towns VALUES
('Maidenhead','Berkshire'),('Reading','Berkshire'),('Shrewsbury','Shropshire')
,('Oxford','Oxfordshire');
CREATE TABLE languages (language VARCHAR(30) NOT NULL PRIMARY KEY,
country VARCHAR(30), INDEX lang_country_index(country), CONSTRAINT
country_language FOREIGN KEY (country) REFERENCES counties(country) ON DELETE
RESTRICT ON UPDATE RESTRICT) engine=ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21026 'Create foreign key failed in NDB - parent index is not unique index' from NDB
Error 1215 Cannot add foreign key constraint
CREATE TABLE languages (language VARCHAR(30) NOT NULL PRIMARY KEY,
country VARCHAR(30), INDEX lang_country_index(country), CONSTRAINT
country_language FOREIGN KEY (country) REFERENCES counties(country) ON DELETE
RESTRICT ON UPDATE RESTRICT) engine=ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21026 'Create foreign key failed in NDB - parent index is not unique index' from NDB
Error 1215 Cannot add foreign key constraint
CREATE TABLE languages (id INT NOT NULL PRIMARY KEY) engine=ndb;
drop table languages, towns, counties;
# test: child vs parent column types
create table t1 (
a int not null,
b int not null,
primary key using hash (a),
unique key using hash (b)
) engine ndb;
create table t2 (
a int not null,
b char(20) not null,
primary key using hash (a),
key (b),
constraint fk1 foreign key (b) references t1 (b)
) engine ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1215 Parent column t1.b is incompatible with child column t2.b in NDB
Error 1215 Cannot add foreign key constraint
create table t2 (
a int not null,
b char(10) not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (b) references t1 (b);
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1215 Parent column t1.b is incompatible with child column t2.b in NDB
Error 1215 Cannot add foreign key constraint
drop table t2, t1;
# test: parent table not exist
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b),
constraint fk1 foreign key (b) references t1 (b)
) engine ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1215 Parent table t1 not found in NDB: 723: No such table existed
Error 1215 Cannot add foreign key constraint
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (b) references t1 (b);
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1215 Parent table t1 not found in NDB: 723: No such table existed
Error 1215 Cannot add foreign key constraint
drop table t2;
# test: parent column not exist
create table t1 (
a int not null,
primary key using hash (a)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b),
constraint fk1 foreign key (b) references t1 (b)
) engine ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1215 Parent table t1 has no column b in NDB
Error 1215 Cannot add foreign key constraint
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (b) references t1 (b);
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1215 Parent table t1 has no column b in NDB
Error 1215 Cannot add foreign key constraint
drop table t2, t1;
# test: parent key no index
create table t1 (
a int not null,
b int not null,
primary key using hash (a)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b),
constraint fk1 foreign key (b) references t1 (b)
) engine ndb;
ERROR HY000: Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
show warnings;
Level Code Message
Error 1822 Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
Error 1215 Cannot add foreign key constraint
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (b) references t1 (b);
ERROR HY000: Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
show warnings;
Level Code Message
Error 1822 Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
Error 1215 Cannot add foreign key constraint
drop table t2, t1;
# test: parent key no unique index
create table t1 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b),
constraint fk1 foreign key (b) references t1 (b)
) engine ndb;
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21026 'Create foreign key failed in NDB - parent index is not unique index' from NDB
Error 1215 Cannot add foreign key constraint
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (b) references t1 (b);
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21026 'Create foreign key failed in NDB - parent index is not unique index' from NDB
Error 1215 Cannot add foreign key constraint
drop table t2, t1;
# test: child column not exist
create table t1 (
a int not null,
b int not null,
primary key using hash (a),
unique key using hash (b)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b),
constraint fk1 foreign key (c) references t1 (b)
) engine ndb;
ERROR 42000: Key column 'c' doesn't exist in table
show warnings;
Level Code Message
Error 1072 Key column 'c' doesn't exist in table
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (c) references t1 (b);
ERROR 42000: Key column 'c' doesn't exist in table
show warnings;
Level Code Message
Error 1072 Key column 'c' doesn't exist in table
drop table t2, t1;
# test: child column no index
# no error - server creates KEY
create table t1 (
a int not null,
b int not null,
primary key using hash (a),
unique key using hash (b)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
constraint fk1 foreign key (b) references t1 (b)
) engine ndb;
drop table t2;
create table t2 (
a int not null,
b int not null,
primary key using hash (a)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (b) references t1 (b);
drop table t2, t1;
# test: child vs parent column count
create table t1 (
a int not null,
b int not null,
c int not null,
primary key using hash (a),
unique key using hash (b, c)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b),
constraint fk1 foreign key (b) references t1 (b)
) engine ndb;
ERROR HY000: Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
show warnings;
Level Code Message
Error 1822 Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
Error 1215 Cannot add foreign key constraint
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (b)
) engine ndb;
alter table t2 algorithm=inplace,
add constraint fk1 foreign key (b) references t1 (b);
ERROR HY000: Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
show warnings;
Level Code Message
Error 1822 Failed to add the foreign key constaint. Missing index for constraint 'fk1' in the referenced table 't1'
Error 1215 Cannot add foreign key constraint
drop table t2, t1;
# bug#16246874
create table t1 (
id int primary key
) engine=ndb;
create table t2 (
id int,
foreign key(id) references t1(id)
) engine=ndb;
select * from information_schema.key_column_usage;
select REFERENCED_TABLE_SCHEMA, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME
from information_schema.key_column_usage
where TABLE_SCHEMA = 'test' and TABLE_NAME = 't2';
REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME REFERENCED_COLUMN_NAME
test t1 id
drop table t2, t1;
# bug#16275509 - case: alter engine from ndb
create table t1 (
a int not null,
primary key using hash (a)
) engine=ndb;
create table t2 (
a int not null,
primary key using hash (a),
foreign key fk1 (a) references t1 (a)
) engine=ndb;
alter table t1 engine=innodb;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
alter table t2 engine=innodb;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
drop table t2, t1;
create table t1 (
a int primary key,
b int,
key (b),
foreign key fk1 (b) references t1 (a)
) engine=ndb;
alter table t1 engine=innodb;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
drop table t1;
# bug#16275509 - case: allow FKs on partitioned
set new=on;
create table t1 (
a int primary key
) engine=ndb
partition by hash (a) partitions 5;
create table t2 (
a int primary key,
foreign key fk1 (a) references t1 (a)
) engine=ndb;
drop table t2, t1;
create table t1 (
a int primary key
) engine=ndb;
create table t2 (
a int primary key,
foreign key fk1 (a) references t1 (a)
) engine=ndb;
alter table t1
partition by hash (a) partitions 5;
drop table t2, t1;
create table t1 (
a int primary key
) engine=ndb;
create table t2 (
a int primary key,
foreign key fk1 (a) references t1 (a)
) engine=ndb
partition by hash (a) partitions 5;
drop table t2;
create table t2 (
a int primary key,
foreign key fk1 (a) references t1 (a)
) engine=ndb;
alter table t2
partition by hash (a) partitions 5;
drop table t2, t1;
# bug#16275684 - case: alter FK parent column
create table t1 (
a int primary key,
b int not null,
unique key (b)
) engine=ndb;
create table t2 (
a int primary key,
b int not null,
key (b),
foreign key fk1 (b) references t1 (b)
) engine=ndb;
insert into t1 values (1,10),(2,20);
insert into t2 values (1,10),(2,10),(3,20);
alter table t1 modify column b char(20) not null;
ERROR HY000: Cannot change column 'b': used in a foreign key constraint 'fk1' of table 'test.t2'
alter table t2 drop foreign key fk1;
alter table t1 modify column b char(20) not null;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` char(20) NOT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
select * from t1 order by a;
a b
1 10
2 20
select * from t2 order by a;
a b
1 10
2 10
3 20
drop table t2, t1;
# bug#16286164 - case: drop when referenced by different table
set @i=2;
create table t1 (
a int not null,
primary key using hash (a)
) engine=innodb;
create table t2 (
a int not null,
b int,
primary key using hash (a),
key (b),
foreign key fk1 (b) references t1 (a)
) engine=innodb;
drop table t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
drop table t2, t1;
set @i=1;
create table t1 (
a int not null,
primary key using hash (a)
) engine=ndb;
create table t2 (
a int not null,
b int,
primary key using hash (a),
key (b),
foreign key fk1 (b) references t1 (a)
) engine=ndb;
drop table t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
drop table t2, t1;
# bug#16286164 - case: drop when referenced by same table
set @i=2;
create table t1 (
a int not null,
b int,
primary key using hash (a),
key (b),
foreign key fk1 (b) references t1 (a)
) engine=innodb;
drop table t1;
set @i=1;
create table t1 (
a int not null,
b int,
primary key using hash (a),
key (b),
foreign key fk1 (b) references t1 (a)
) engine=ndb;
drop table t1;
# BugXXZ - multi part unique index parent
create table t1 (
a int not null,
b int not null,
primary key using hash (a),
unique key using hash (a,b)
) engine ndb;
create table t2 (
a int not null,
b int not null,
primary key using hash (a),
key (a,b),
foreign key fk1 (a,b) references t1 (a,b)
) engine ndb;
drop table t2, t1;
# child-part-key
create table t1 (
a int not null,
primary key using hash (a)
) engine ndb;
insert into t1 values (1),(2);
create table t2 (
a int not null,
b int not null,
c int not null,
primary key using hash (a),
key xbc (b,c),
foreign key fk1 (b) references t1 (a)
) engine ndb;
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,
PRIMARY KEY (`a`) USING HASH,
KEY `xbc` (`b`,`c`),
CONSTRAINT `fk1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
insert into t2 (a,b,c) values (1,1,11),(2,2,21),(3,2,22);
insert into t2 (a,b,c) values (4,3,33);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code)
delete from t1 where a = 1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (Unknown error code)
drop table t2;
create table t2 (
a int not null,
b int not null,
c int not null,
primary key using hash (a),
key xbc (b,c),
foreign key fk1 (c) references t1 (a)
) engine ndb;
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,
PRIMARY KEY (`a`) USING HASH,
KEY `xbc` (`b`,`c`),
KEY `fk1` (`c`),
CONSTRAINT `fk1` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
insert into t2 (a,c,b) values (1,1,11),(2,2,21),(3,2,22);
insert into t2 (a,c,b) values (4,3,33);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code)
delete from t1 where a = 1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (Unknown error code)
drop table t2;
create table t2 (
a int not null,
b int not null,
c int not null,
primary key using hash (a),
unique key xbc (b,c) using hash,
foreign key fk1 (b) references t1 (a)
) engine ndb;
ERROR HY000: Cannot add foreign key constraint
create table t2 (
a int not null,
b int not null,
c int not null,
primary key using hash (a),
unique key xbc (b,c) using hash,
foreign key fk1 (c) references t1 (a)
) engine ndb;
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,
PRIMARY KEY (`a`) USING HASH,
UNIQUE KEY `xbc` (`b`,`c`) USING HASH,
KEY `fk1` (`c`),
CONSTRAINT `fk1` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
insert into t2 (a,c,b) values (1,1,11),(2,2,21),(3,2,22);
insert into t2 (a,c,b) values (4,3,33);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code)
delete from t1 where a = 1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (Unknown error code)
drop table t2, t1;
create table t1_parent (pk1 char(255) primary key) engine = ndb;
create table t1 (
c50 char(255), c49 char(255), c48 char(255), c47 char(255), c46 char(255),
c45 char(255), c44 char(255), c43 char(255), c42 char(255), c41 char(255),
c40 char(255), c39 char(255), c38 char(255), c37 char(255), c36 char(255),
c35 char(255), c34 char(255), c33 char(255), c32 char(255), c31 char(255),
c30 char(255), c29 char(255), c28 char(255), c27 char(255), c26 char(255),
c25 char(255), c24 char(255), c23 char(255), c22 char(255), c21 char(255),
c20 char(255), c19 char(255), c18 char(255), c17 char(255), c16 char(255),
c15 char(255), c14 char(255), c13 char(255), c12 char(255), c11 char(255),
c10 char(255), c9 char(255), c8 char(255), c7 char(255), c6 char(255),
c5 char(255), c4 char(255), c3 char(255), c2 char(255), c1 char(255),
primary key using hash(c1)
,foreign key(c1) references t1_parent(pk1)
) engine=ndb;
ERROR HY000: Got error 851 'Maximum 8052 bytes of FIXED columns supported, use varchar or COLUMN_FORMAT DYNAMIC instead' from NDBCLUSTER
create table t1(a int primary key) engine = ndb;
drop table t1, t1_parent;
# bug#17591531 - ERROR ON DROP INDEX WHEN REFERENCING FOREIGN KEYS
create table t1 (
a int not null,
b int not null,
unique key t1x1 (b) using hash,
primary key using hash (a)
) engine=ndb;
create table t2 (
a int not null,
b int not null,
c int not null,
key (c),
key t2x1 (b),
primary key using hash (a),
foreign key t2fk1 (b) references t1 (b)
) engine=ndb;
# try to drop indexes
alter table t1 drop index t1x1;
ERROR HY000: Cannot drop index 't1x1': needed in a foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21081 'Drop index not allowed in NDB - used as parent index of a foreign key' from NDB
Error 1553 Cannot drop index 't1x1': needed in a foreign key constraint
alter table t2 drop index t2x1;
ERROR HY000: Cannot drop index 't2x1': needed in a foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21082 'Drop index not allowed in NDB - used as child index of a foreign key' from NDB
Error 1553 Cannot drop index 't2x1': needed in a foreign key constraint
insert into t1 values (1,10),(2,20),(3,30);
insert into t2 values (1,10,100),(2,20,200),(3,30,300);
insert into t2 values (4,40,400);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code)
delete from t1 where a=1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (Unknown error code)
drop table t2, t1;
# bug#17232212 - NDB DROP NON-EXISTENT FK SUCCEEDS
create table t1 (
a int primary key
) engine=ndb;
# algorithm=inplace
create table t2 (
a int primary key,
b int,
c int,
key xb (b),
key xc (c),
foreign key fkb (b) references t1 (a),
foreign key fkc (c) references t1 (a)
) engine=ndb;
alter table t2
drop foreign key nosuchfk,
algorithm=inplace;
ERROR 42000: Can't DROP 'nosuchfk'; check that column/key exists
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `xb` (`b`),
KEY `xc` (`c`),
CONSTRAINT `fkb` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fkc` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
alter table t2
drop foreign key fkb,
drop foreign key nosuchfk,
drop foreign key fkc,
algorithm=inplace;
ERROR 42000: Can't DROP 'nosuchfk'; check that column/key exists
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `xb` (`b`),
KEY `xc` (`c`),
CONSTRAINT `fkb` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fkc` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
drop table t2;
# algorithm=copy
create table t2 (
a int primary key,
b int,
c int,
key xb (b),
key xc (c),
foreign key fkb (b) references t1 (a),
foreign key fkc (c) references t1 (a)
) engine=ndb;
alter table t2
drop foreign key nosuchfk,
algorithm=copy;
ERROR 42000: Can't DROP 'nosuchfk'; check that column/key exists
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `xb` (`b`),
KEY `xc` (`c`),
CONSTRAINT `fkb` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fkc` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
alter table t2
drop foreign key fkb,
drop foreign key nosuchfk,
drop foreign key fkc,
algorithm=copy;
ERROR 42000: Can't DROP 'nosuchfk'; check that column/key exists
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `xb` (`b`),
KEY `xc` (`c`),
CONSTRAINT `fkb` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fkc` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
drop table t2, t1;
# bug#18662582 - NDB_FK_DISABLE.TEST FAILS TO DROP FOREIGN KEY
create table t1 (
a int, primary key using hash (a)
) engine = ndb;
create table t2 (
a int, primary key using hash (a)
) engine = ndb;
alter table t2 add constraint fkname foreign key (a) references t1 (a);
create table t3 (
a int, primary key using hash (a)
) engine = ndb;
alter table t3 add constraint fkname foreign key (a) references t2 (a);
alter table t2 algorithm=inplace, drop foreign key nosuchfk;
ERROR 42000: Can't DROP 'nosuchfk'; check that column/key exists
alter table t2 algorithm=inplace, drop foreign key fkname;
alter table t3 algorithm=inplace, drop foreign key fkname;
drop table t1, t2, t3;
create table t1 (
a int, primary key using hash (a)
) engine = ndb;
create table t2 (
a int, primary key using hash (a)
) engine = ndb;
alter table t2 add constraint fkname foreign key (a) references t1 (a);
create table t3 (
a int, primary key using hash (a)
) engine = ndb;
alter table t3 add constraint fkname foreign key (a) references t2 (a);
alter table t2 algorithm=copy, drop foreign key nosuchfk;
ERROR 42000: Can't DROP 'nosuchfk'; check that column/key exists
alter table t2 algorithm=copy, drop foreign key fkname;
alter table t3 algorithm=copy, drop foreign key fkname;
drop table t1, t2, t3;
# bug#18824753 - NDB_RESTORE FAILS WITH FKS WITH SAME NAME
create table t1 (a int primary key) engine=ndb;
create table t2 (a int primary key) engine=ndb;
create table t3 (a int primary key) engine=ndb;
create table t4 (a int primary key) engine=ndb;
alter table t2
add constraint foreign key myfk (a) references t1 (a);
alter table t4
add constraint foreign key myfk (a) references t3 (a);
alter table t4
add constraint foreign key `11/22/myfk` (a) references t3 (a);
ERROR HY000: Cannot add foreign key constraint
show warnings;
Level Code Message
Warning 1296 Got error 21090 'Create foreign key failed in NDB - name contains invalid character (/)' from NDB
Error 1215 Cannot add foreign key constraint
# run backup
drop table t2, t1;
drop table t4, t3;
# run restore meta
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) NOT NULL,
PRIMARY KEY (`a`),
CONSTRAINT `myfk` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
show create table t4;
Table Create Table
t4 CREATE TABLE `t4` (
`a` int(11) NOT NULL,
PRIMARY KEY (`a`),
CONSTRAINT `myfk` FOREIGN KEY (`a`) REFERENCES `t3` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
drop table t2, t1;
drop table t4, t3;
# bug18825966 - ADDING FK TO TABLE WITH DATA GIVES INTERNAL ERROR 208
create table t1 (
c0 int,
c1 int,
primary key using hash (c1)
) engine=ndb;
create table t2 (
c0 int,
primary key using hash (c0)
) engine=ndb;
insert into t1 (c1) values (1);
insert into t2 (c0) values (1);
alter table t2 add constraint foreign key fk (c0) references t1 (c1);
drop table t2, t1;
create table t1 (
c0 int,
c1 int,
c2 int,
c3 int,
c4 int,
c5 int,
primary key (c2,c5)
) engine=ndb;
create table t2 (
c0 int,
c1 int,
c2 int,
c3 int,
c4 int,
c5 int,
primary key (c1,c4)
) engine=ndb;
insert into t1 (c2,c5) values (1,10),(2,20),(3,30);
insert into t2 (c1,c4) values (1,10),(2,20),(3,30);
alter table t2 add constraint foreign key fk (c1,c4) references t1 (c2,c5);
insert into t2 (c1,c4) values (4,40);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code)
drop table t2, t1;
create table t1 (
c0 int,
c1 int,
c2 int not null,
c3 int,
c4 int,
c5 int not null,
primary key (c0),
unique key using hash (c2,c5)
) engine=ndb;
create table t2 (
c0 int,
c1 int,
c2 int,
c3 int,
c4 int,
c5 int,
primary key (c1,c4)
) engine=ndb;
insert into t1 (c0,c2,c5) values (1,1,10),(2,2,20),(3,3,30);
insert into t2 (c1,c4) values (1,10),(2,20),(3,30);
alter table t2 add constraint foreign key fk (c1,c4) references t1 (c2,c5);
insert into t2 (c1,c4) values (4,40);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code)
drop table t2, t1;