本文利用数据库中间件技术来解决异构数据库访问的问题。

This paper makes use of the database middleware technology to resolve the problem of the access to the heterogeneous databases.

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然后，就系统的三个难点问题——异常处理、安全权限控制和异构数据库访问进行了深入的研究。

Then, this paper deeply investigated the three difficult problems of the system, such as exception handling, security right controlling and heterogeneous database access.

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通过异构批处理特性，这些跨表更新只需访问数据库一次即可完成。

With heterogeneous batching, these updates across tables can be done in a single trip to the database.

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