Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/53271
Title: An efficient semantic query optimization algorithm
Authors: Pang, Hwee Hwa 
Lu, HongJun 
Ooi, Beng Chin 
Issue Date: Apr-1991
Source: Pang, Hwee Hwa,Lu, HongJun,Ooi, Beng Chin (1991-04). An efficient semantic query optimization algorithm. Proceedings - International Conference on Data Engineering : 326-335. ScholarBank@NUS Repository.
Abstract: An efficient semantic query optimization algorithm is proposed, in which all possible transformations are tentatively applied to the query. Instead of physically modifying the query, the transformation process classifies the predicates into imperative, optional, or redundant. At the end of the transformation process, all the imperative predicates are retained while the redundant predicates are eliminated. Optional predicates are retrained or discarded based on the estimated cost/benefit of retaining them. The issue of the grouping of semantic constraints to reduce the overhead of retrieving constraints and checking whether each constraint is relevant to the current query is also addressed. Based on the proposed algorithm, a prototype semantic query optimizer has been built and preliminary experiments show that the optimizer performs well for large databases.
Source Title: Proceedings - International Conference on Data Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/53271
ISBN: 0818621389
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

51
checked on Dec 16, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.