Design and implementation of SQL interpreter based on file stored GIS
Lin Yang · Jisuanji gongcheng yu sheji · 2006
Aiming at the problem that file stored GIS system couldn't implement query automatically,combining SQL-99 standards and syntax rules which are defined in GIS software,MAPGIS,applying theory of lexical analysis and syntactical analysis implements the function of translating query expression which is input by users to a standard SQL sentence and outputs results.The SQL interpreter has already been used in attribute query model of file managed MAPGIS software.