Announcement for Downloading full text filePlease respect the Copyright Act.
All digital full text dissertation and theses from this website are authorized the copyright owners. These copyrighted full-text dissertation and theses can be only used for academic, research and non-commercial purposes. Users of this website can search, read, and print for personal usage. In respect of the Copyright Act of the Republic of China, please do not reproduce, distribute, change, or edit the content of these dissertations and theses without any permission. Please do not create any work based upon a pre-existing work by reproduction, Adaptation, Distribution or other means.
URN etd-0718104-211031 Statistics This thesis had been viewed 2770 times. Download 1022 times. Author Cheng-Ling shiou Author's Email Address firstname.lastname@example.org Department Computer Science and Enginerring Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 49 Title Implementation for Subcube Based Query Processing Keyword subcube query processing OLAP materialized view data warehous data cube data cube data warehous materialized view OLAP query processing subcube Abstract Data cube materialization is commonly used in reducing OLAP response time. However, to materialize a whole data cube needs large disk space, because the focus on the interested subjects of decision makers results in only a small portion of data cubes being frequently accessed. The subcube, a finer partition of a data cube is proposed. The subcubes are formed by mapping the multi-dimensional queries, and the number of subcubes becomes larger after various queries issued by users with different dimension levels and value ranges. The management framework of these subcubes is important. Another concerned issue is how to pick up the most appropriate subcubes for the query processing. The technique directly affects the query performance. This thesis research uses binary trees and linked lists to manage and organize the subcubes. For saving the query processing time, an algorithm for searching appropriate subcubes is proposed, and the performance of the subcube based query processing algorithm is improved. Advisor Committee Huei-Huang Chen - advisor
none - co-chair
none - co-chair
Files Date of Defense 2004-07-08 Date of Submission 2004-07-18