Query processing contains parsing of global query, binding ofquery variable, decompositionofquery and rewriting of query.
查询处理包括全局查询语句解析、查询变量绑定、查询分解和查询重写。
2
In the procedure of path decomposition and query plan selection, target node in the query tree is utilized to avoid the transfer of the intermediate results.
在路径分解和查询计划选择的过程中，利用查询树中的目标节点来避免中间结果的传递。
3
In view of the significance ofquerydecomposition and optimization in the Heterogeneous Data Resource Integration System, in-depth research on this aspect was mainly conducted.