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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 algorithm=inplace, add constraint fk1 foreign key (a) references parent(a);
alter table child algorithm=inplace, add constraint fk2 foreign key (b) references parent(a);
alter table child algorithm=inplace, add constraint fk3 foreign key (c) references parent(a);
show create table child;
Table Create Table
child CREATE TABLE `child` (
`a` int(11) NOT NULL AUTO_INCREMENT,
`b` int(11) NOT NULL,
`c` int(11) NOT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`) USING HASH,
KEY `c` (`c`),
CONSTRAINT `fk1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fk2` FOREIGN KEY (`b`) REFERENCES `parent` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fk3` FOREIGN KEY (`c`) REFERENCES `parent` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
alter table child algorithm=inplace, drop foreign key fk1;
show create table child;
Table Create Table
child CREATE TABLE `child` (
`a` int(11) NOT NULL AUTO_INCREMENT,
`b` int(11) NOT NULL,
`c` int(11) NOT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`) USING HASH,
KEY `c` (`c`),
CONSTRAINT `fk2` FOREIGN KEY (`b`) REFERENCES `parent` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `fk3` FOREIGN KEY (`c`) REFERENCES `parent` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
alter table child algorithm=inplace, drop foreign key fk2;
show create table child;
Table Create Table
child CREATE TABLE `child` (
`a` int(11) NOT NULL AUTO_INCREMENT,
`b` int(11) NOT NULL,
`c` int(11) NOT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`) USING HASH,
KEY `c` (`c`),
CONSTRAINT `fk3` FOREIGN KEY (`c`) REFERENCES `parent` (`a`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
alter table child algorithm=inplace, drop foreign key fk3;
show create table child;
Table Create Table
child CREATE TABLE `child` (
`a` int(11) NOT NULL AUTO_INCREMENT,
`b` int(11) NOT NULL,
`c` int(11) NOT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`) USING HASH,
KEY `c` (`c`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
drop table parent, child;
CREATE TABLE bug46599a (
b VARCHAR(2), PRIMARY KEY(b)) ENGINE=ndb;
CREATE TABLE bug46599b (b VARCHAR(2),
CONSTRAINT fk1 FOREIGN KEY (b) REFERENCES bug46599a (b)) ENGINE=Ndb;
INSERT INTO bug46599a VALUES ('b');
INSERT INTO bug46599b VALUES ('b'), (NULL);
INSERT INTO bug46599b VALUES ('');
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (Unknown error code)
SELECT * FROM bug46599a;
b
b
SELECT * FROM bug46599b;
b
NULL
b
ALTER TABLE bug46599b MODIFY COLUMN b VARCHAR(2) NOT NULL DEFAULT '';
ERROR HY000: Cannot change column 'b': used in a foreign key constraint 'fk1'
SELECT * FROM bug46599b;
b
NULL
b
DROP TABLE bug46599b,bug46599a;
create table t1(
col1 int not null primary key,
col2 int not null,
col3 varchar(35) not null,
unique name0 (col2),
unique name1 (col3)
) engine=ndb;
create table t2(
col1 int not null unique,
col2 int not null,
col3 varchar(35),
constraint fk1 foreign key (col3) references t1(col3)
) engine=ndb;
ALTER TABLE t1 DROP COLUMN col2;
drop table t2, t1;
set @i=2;
create table t1(
col1 int not null primary key,
col2 int not null unique,
col3 varchar(35)
) engine=innodb;
create table t2(
col1 int not null unique,
col2 int not null,
col3 varchar(35),
constraint fk1 foreign key (col2) references t1(col1)
) engine=innodb;
insert into t1(col1,col2,col3) values (2, 3, 'abcdefghijkl');
insert into t2(col1,col2,col3) values (1, 2, 'abcdefghijkl');
# Attempt to drop col1, should give error
ALTER TABLE t1 DROP COLUMN col1;
ERROR HY000: Cannot drop column 'col1': needed in a foreign key constraint 'fk1' of table 'test.t2'
# Attempt to modify col1, should give error
ALTER TABLE t1 MODIFY COLUMN col1 bigint;
ERROR HY000: Cannot change column 'col1': used in a foreign key constraint 'fk1' of table 'test.t2'
# Drop the column t1.col3
ALTER TABLE t1 DROP COLUMN col3;
# Drop t2.col2
ALTER TABLE t2 DROP COLUMN col2;
Got one of the listed errors
drop table t2, t1;
set @i=1;
create table t1(
col1 int not null primary key,
col2 int not null unique,
col3 varchar(35)
) engine=ndb;
create table t2(
col1 int not null unique,
col2 int not null,
col3 varchar(35),
constraint fk1 foreign key (col2) references t1(col1)
) engine=ndb;
insert into t1(col1,col2,col3) values (2, 3, 'abcdefghijkl');
insert into t2(col1,col2,col3) values (1, 2, 'abcdefghijkl');
# Attempt to drop col1, should give error
ALTER TABLE t1 DROP COLUMN col1;
ERROR HY000: Cannot drop column 'col1': needed in a foreign key constraint 'fk1' of table 'test.t2'
# Attempt to modify col1, should give error
ALTER TABLE t1 MODIFY COLUMN col1 bigint;
ERROR HY000: Cannot change column 'col1': used in a foreign key constraint 'fk1' of table 'test.t2'
# Drop the column t1.col3
ALTER TABLE t1 DROP COLUMN col3;
# Drop t2.col2
ALTER TABLE t2 DROP COLUMN col2;
Got one of the listed errors
drop table t2, t1;
#
# Test non-auto partitioning
#
CREATE TABLE t1
(col1 int NOT NULL PRIMARY KEY,
col2 int NOT NULL,
col3 varchar(35) NOT NULL,
UNIQUE KEY name0 (col2),
UNIQUE KEY name1 (col3)
)
ENGINE = NDB;
CREATE TABLE t2
(col1 int NOT NULL UNIQUE,
col2 int NOT NULL,
col3 varchar(35),
CONSTRAINT fk1 FOREIGN KEY (col3) REFERENCES t1 (col3)
)
ENGINE = NDB;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) NOT NULL,
PRIMARY KEY (`col1`),
UNIQUE KEY `name0` (`col2`),
UNIQUE KEY `name1` (`col3`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) DEFAULT NULL,
UNIQUE KEY `col1` (`col1`),
KEY `fk1` (`col3`),
CONSTRAINT `fk1` FOREIGN KEY (`col3`) REFERENCES `t1` (`col3`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
ALTER TABLE t1 PARTITION BY KEY ();
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) NOT NULL,
PRIMARY KEY (`col1`),
UNIQUE KEY `name0` (`col2`),
UNIQUE KEY `name1` (`col3`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY () */
ALTER TABLE t1 PARTITION BY KEY (col1);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) NOT NULL,
PRIMARY KEY (`col1`),
UNIQUE KEY `name0` (`col2`),
UNIQUE KEY `name1` (`col3`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (col1) */
ALTER TABLE t1 REMOVE PARTITIONING;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) NOT NULL,
PRIMARY KEY (`col1`),
UNIQUE KEY `name0` (`col2`),
UNIQUE KEY `name1` (`col3`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
ALTER TABLE t2 PARTITION BY KEY ();
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) DEFAULT NULL,
UNIQUE KEY `col1` (`col1`),
KEY `fk1` (`col3`),
CONSTRAINT `fk1` FOREIGN KEY (`col3`) REFERENCES `t1` (`col3`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY () */
ALTER TABLE t2 PARTITION BY KEY (col1);
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) DEFAULT NULL,
UNIQUE KEY `col1` (`col1`),
KEY `fk1` (`col3`),
CONSTRAINT `fk1` FOREIGN KEY (`col3`) REFERENCES `t1` (`col3`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (col1) */
ALTER TABLE t2 REMOVE PARTITIONING;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`col1` int(11) NOT NULL,
`col2` int(11) NOT NULL,
`col3` varchar(35) DEFAULT NULL,
UNIQUE KEY `col1` (`col1`),
KEY `fk1` (`col3`),
CONSTRAINT `fk1` FOREIGN KEY (`col3`) REFERENCES `t1` (`col3`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
DROP TABLE t2, t1;