Performance of OLAP queries becomes a critical issue as the amount of data in the data warehouses increases rapidly. To solve this performance issue, we proposed a high performance database cluster system called Hyper...
详细信息
ISBN:
(纸本)9783642241055;9783642241062
Performance of OLAP queries becomes a critical issue as the amount of data in the data warehouses increases rapidly. To solve this performance issue, we proposed a high performance database cluster system called HyperDB in which many PCs can be mobilized for excellent performance. In HyperDB, an OLAP query can be decomposed into sub-queries, and each of the sub-queries can be processed independently on a PC in a short time. But if an OLAP query has nested form (i.e., nested SQL), it could not be decomposed into sub-queries. In this paper, we propose a paralleldistributedqueryprocessing algorithm for nested queries in HyperDB system. Traditionally, paralleldistributedprocessing of nested queries is known as a difficult problem in the database area.
暂无评论