NDLI: A uniform framework for processing temporal object queries

Content Provider	IEEE Xplore Digital Library
Author	Wang, L. Wing, M. Davis, C. Revell, N.
Copyright Year	1997
Description	Author affiliation: Sch. of Comput. Eng., Middlesex Univ., London, UK (Wang, L.)
Abstract	The paper explores a uniform framework for processing temporal queries in the context of object oriented databases. A temporal object data model is developed by extending the unified model of RDBs and OODBs from UniSQL/X with a time dimension, that forms temporal relational-like cubes but with aggregation and inheritance hierarchies. A query algebra is thereby defined to provide an access of objects through these associations of aggregation, inheritance and time reference. Due to the hierarchy of the data model and reducibility of the query algebra, an extensible approach to processing temporal object queries within the uniform query processing framework is attained. A set of transformation rules is identified for query rewrite, that includes the known relational and object rules plus those pertaining to the time reference. To evaluate temporal queries involved in the path, a decomposition strategy is proposed. It has been shown that temporal object queries can be processed and optimized within the uniform query processing framework.
Starting Page	28
Ending Page	37
File Size	635458
Page Count	10
File Format	PDF
ISBN	0818685514
DOI	10.1109/TOOLS.1997.713524
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-09-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Data models Query processing Object oriented modeling Algebra Relational databases Multimedia databases Computer aided manufacturing Application software Computer aided software engineering Object oriented databases
Content Type	Text
Resource Type	Article

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