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https://issues.apache.org/jira/browse/OPENJPA-1070?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pinaki Poddar resolved OPENJPA-1070.
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Resolution: Fixed
> Restore support for composite foreign keys on MySQL
> ---------------------------------------------------
>
> 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
> Assignee: Pinaki Poddar
> 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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