【摘要】 讨论一种在分布式计算环境中实现基于全局逻辑的空间查询语言解析方法,并给出其实现机制。提出空间查询语言的全局解析模型及等价分布程序的概念,给出将全局空间查询语句解析为等价分布程序的方法。利用该方法能够完成全局空间查询语句到局部查询语句的映射,从而支持空间数据的分布式查询。更多还原

【Abstract】 Aimed at the working mechanism of GSQL(Geographic SQL) under distributed computation circumstance,an approach to GSQL global parsing was derived in this paper.Based on bringing forward the GSQL global parsing model and one new concept: EDP(Equivalence Distributed Program),the detailed flow of how to parse the global GSQL statement into an EDP file was introduced.Using this approach,one global GSQL statement could be mapped into several local statements,the generated EDP file also specifies the local statements’ execution order,and so it can support the query of distributed spatial data.更多还原