空间数据库查询语言的特征

详细信息

The Features of Spatial Database Query Languages

摘要: 简介了目前空间数据库查询语言研究情况和所具有的形式,按空间数据的特点和查询语言的一般要求,认为空间数据库查询语言应具有以下特征:能理解"空间概念",能描述查询结果的表达方式和查询描述的非过程化。指出了目前空间数据库查询语言集中的3个研究方面各自的特点及待研究的主要问题。
- 空间数据 /
- 数据库 /
- 查询语言
Abstract: Query languages are the most sensitive functions to users. Spatial database query languages should completely supply users with needed data which describe some spatial phenomena. This papaer will give a brief description of the current situation on the spatial database query languages and their main forms. Through analysis of the requirements for spatial database query languages, we boil down, based on characteristics of spatial data and general requirements of query languages, that the query languages must be equipped with the three features:understanding "spatial concepts", descriptive representation of queried results and declarative query process. In the final part of this paper, we outline the main features of three main aspects in spatial database query languages and the key research topics on the query languages in the future.
- spatial data /
- databases /
- query languages