Restore support for composite foreign keys on MySQL
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Key: OPENJPA-1070
URL: https://issues.apache.org/jira/browse/OPENJPA-1070
Project: OpenJPA
Issue Type: Bug
Components: jdbc
Affects Versions: 1.2.1, 2.0.0
Reporter: Martin Dirichs
Priority: Minor
When creating the database schema for MySQL databases, OpenJPA refuses to
define foreign key constraints for composite keys. Warning message is:
openjpa.jdbc.Schema - The foreign key "<foreignkey>" was not added to table
"[...]" The reason for this is that composite foreign key support is explicitly
disabled in MySQLDictionary.
However, composite foreign keys seem to work flawlessly in recent MySQL
versions (such as 5.0.51a). Probably this limitation in MySQLDictionary thus is
historic and can be removed.
For the corresponding mailing list discussion, see here:
http://n2.nabble.com/Composite-foreign-keys-with-MySQL-tc2772257.html
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