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https://stackoverflow.com/questions/14876649/foreign-keys-with-mysql-cluster-ndb
Since version 7.3 MySQL Cluster should be capable of foreign key constraints. ... you cannot reference a primary key column in a foreign key constraint" or "with NDB you have to reference UNIQUE KEYS in foreign key constraints"? ... in InnoDB is that MySQL Cluster does not support the updating of Primary Keys from within the Data Nodes ...
https://dev.mysql.com/doc/mysql-cluster-excerpt/5.7/en/mysql-cluster-limitations-syntax.html
Support for foreign key constraints in NDB 7.5 is comparable to that provided by InnoDB, subject to the following restrictions: Every column referenced as a foreign key requires an explicit unique key, if it is not the table's primary key.
https://dev.mysql.com/doc/refman/8.0/en/constraint-foreign-key.html
Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ON ... InnoDB and NDB tables support foreign keys. PREV HOME UP NEXT . Related Documentation. MySQL 8.0 Release Notes
http://www.clusterdb.com/mysql-cluster/foreign-keys-in-mysql-cluster
Jun 18, 2013 · Foreign Keys in MySQL Cluster. ... What the 7.3 DMR focussed on was showcasing Foreign Key support rather than additional performance gains. ... ” does this means that in cluster NDB engine, the reference foreign key should be only one UNIQUE key, but cann’t be a part of multi-coloumn key?
https://docs.oracle.com/cd/E17952_01/mysql-5.7-en/constraint-foreign-key.html
Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements.
https://dev.mysql.com/doc/refman/5.6/en/create-table-foreign-keys.html
NDB requires an explicit unique key (or primary key) on any column referenced as a foreign key. InnoDB does not, which is an extension of standard SQL. Index prefixes on foreign key columns are not supported.
https://dev.mysql.com/doc/refman/5.7/en/innodb-foreign-key-constraints.html
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https://docs.oracle.com/cd/E17952_01/mysql-5.6-en/create-table-foreign-keys.html
NDB requires an explicit unique key (or primary key) on any column referenced as a foreign key. InnoDB does not, which is an extension of standard SQL. Index prefixes on foreign key columns are not supported.
https://dev.mysql.com/doc/refman/5.7/en/constraint-foreign-key.html
Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements. The available referential actions are RESTRICT (the default), CASCADE, SET NULL, and NO ACTION.
https://docs.oracle.com/cd/E17952_01/mysql-8.0-en/constraint-foreign-key.html
Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements.
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