Support for additional relational database systems may be added in future releases.

将来的版本中可能添加对其他关系数据库系统的支持。

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For instance, MySQL doesn't offer full support for foreign keys, meaning it doesn't have all the relational features of Informix, which is a complete relational database.

例如，MySQL不提供全面的外键支持，这意味着它不具有Informix的所有关系特性，而Informix是一个完整的关系数据库。

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Sun enterprise products that are based on a relational database are likely to migrate to MySQL or improve their support for it.

Sun的基于关系数据库的企业产品很可能会迁移到MySQL，或者提升它们对MySQL的支持。

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