本文描述一个分布式关系数据库系统中具有语义优化的查询处理算法。
In this paper, we describe an algorithm, for query processing with semantic optimization in distributed relational database systems.
如何以传统的分布式关系数据库技术为基础，构建适用于无线网络环境的移动数据库成为分布式数据库研究领域中一个重要的问题。
How to construct a mobile database based on traditional distributed database technologies, which can adapt the wireless environment, has been a key problem of distributed database researches.
分布式关系数据库体系结构(distributed relation database architecture, DRDA)是用于客户机与服务器之间通信的常见协议，它由Runtime Client提供。
Distributed relation database architecture (DRDA) is the common protocol used for communication between the client and the server, and is provided by the Runtime client.
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