MySQL 5.6 Reference Manual Including MySQL NDB Cluster 7.3-7.4 Reference Guide
A number of limitations and related issues that existed in earlier versions of NDB Cluster have been resolved in NDB Cluster 7.3. These are described briefly in the following list:
Support for foreign keys.
Foreign key constraints are now supported for
NDB tables, similar to how
these are supported by the
InnoDB storage engine.
Unlike the case with user-partitioned
InnoDB tables, foreign keys are
supported for NDB tables that are
partitioned by KEY or LINEAR
KEY.
Section 1.7.3.2, “FOREIGN KEY Constraints”, provides more information about foreign key support in MySQL. For more information about the syntax supported by MySQL for foreign keys, see Section 13.1.17.5, “FOREIGN KEY Constraints”.