Reformulating Aggregate Queries Using Views
Reformulating Aggregate Queries Using Views
复制标题
使用视图重新制定聚合查询
DOI:
--
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
M. Genesereth
中科院分区:
文献类型:
--
作者:
Abhijeet Mohapatra;M. Genesereth
We propose an algorithm to reformulate aggregate queries using views in a data integration LAV setting. Our algorithm considers a special case of reformulations where aggregates in the query are expressed as views over aggregates in the view definitions. Although the problem of determining whether two queries are equivalent is undecidable, our algorithm returns an equivalent rewriting if one exists.