Parallel Execution of Cyclic Query in Object Oriented Database Systems 面向对象数据库中的有环查询及其并行化处理
The structure of physical layer, link layer and application layer was applied in field-bus of network control, data was gained through cyclic query of principal and subordinate PC in link layer. 控制网络现场总线采用物理层、链路层和应用层结构。链路层以主从循环查询获取数据。
A Practical Efficient Cyclic Query Processing Strategy 一种实用有效的循环查询处理策略
A new relational operator Sj-reduce is introduced in this paper. Using the Sj-reduce can directly solve the cyclic query at a lower communication cost in distributed databases. 本文引进了一种新的关系操作Sj-reduce,它能以较少的通信开销,去直接求解分布式数据库中有回路的查询。
We also raise the characteristics of tree query and cyclic query, tree query recognition algorithm and transformation algorithm from cyclic query to tree query. 我们讨论了树查询和循环查询的特征、树查询的识别和循环查询到树查询的转换。