摘要
空间数据库的主动规则条件测试对于规则的执行效率至关重要。本文采用空间查询代数优化技术和空间算子迁移方法,提出扩展的空间规则鉴别网络(ESRDN)模型,给出ESRDN的优化启发式规则及其正确性证明,分析结果表明,该改进模型可以提高空间数据主动规则的条件测试效率。
The condition testing of active rules in spatial database is a key element to the efficiency of rules execution. Combining the spatial query algebra optimization and spatial operator migration, an extended spatial rule discrimination network ESRDN is proposed. Some heuristic optimization rules of ESRDN are presented and proved. It can be easily deduced by the proofs that the improved model is efficient.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2005年第6期1093-1097,共5页
Systems Engineering and Electronics
