Backup from 7.5 restored
Restart server 1 to trigger schema distribution synchronization
# restart
Restart server 2 to trigger schema distribution synchronization
# restart
SET @old_ndb_metadata_check_server2 = @@global.ndb_metadata_check;
SET GLOBAL ndb_metadata_check = false;
SET @old_ndb_metadata_check_server1 = @@global.ndb_metadata_check;
SET GLOBAL ndb_metadata_check = false;
SHOW CREATE TABLE parent;
Table	Create Table
parent	CREATE TABLE `parent` (
  `c1` int(11) NOT NULL,
  PRIMARY KEY (`c1`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
SELECT * FROM parent;
c1
1
2
INSERT INTO parent VALUES (3);
SELECT * FROM parent;
c1
1
2
3
SHOW CREATE TABLE child;
Table	Create Table
child	CREATE TABLE `child` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`),
  KEY `xc2` (`c2`),
  CONSTRAINT `FK_10_14` FOREIGN KEY (`c2`) REFERENCES `parent` (`c1`) ON DELETE CASCADE ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
INSERT INTO child VALUES (3,3);
INSERT INTO child VALUES (4,4);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `FK_10_14` FOREIGN KEY (`c2`) REFERENCES `parent` (`c1`) ON DELETE CASCADE ON UPDATE NO ACTION)
SELECT * FROM child;
c1	c2
1	1
2	2
3	3
DROP TABLE child;
DROP TABLE parent;
Backup from 7.5 restored
SHOW CREATE TABLE parent;
Table	Create Table
parent	CREATE TABLE `parent` (
  `c1` int(11) NOT NULL,
  PRIMARY KEY (`c1`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
SELECT * FROM parent;
c1
1
2
INSERT INTO parent VALUES (3);
SELECT * FROM parent;
c1
1
2
3
SHOW CREATE TABLE child;
Table	Create Table
child	CREATE TABLE `child` (
  `c1` int(11) NOT NULL,
  `c2` int(11) DEFAULT NULL,
  PRIMARY KEY (`c1`),
  KEY `xc2` (`c2`),
  CONSTRAINT `FK_10_14` FOREIGN KEY (`c2`) REFERENCES `parent` (`c1`) ON DELETE CASCADE ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
INSERT INTO child VALUES (3,3);
INSERT INTO child VALUES (4,4);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `FK_10_14` FOREIGN KEY (`c2`) REFERENCES `parent` (`c1`) ON DELETE CASCADE ON UPDATE NO ACTION)
SELECT * FROM child;
c1	c2
1	1
2	2
3	3
DROP TABLE child;
DROP TABLE parent;
SET GLOBAL ndb_metadata_check = @old_ndb_metadata_check_server2;
SET GLOBAL ndb_metadata_check = @old_ndb_metadata_check_server1;