Export database derivation in object-oriented wrappers

Wrappers export the schema and data of existing heterogeneous databases and support queries on them. In the context of cooperative information systems, we present a flexible approach to specify the derivation of object-oriented (OO) export databases from local relational databases. Our export databa...

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Main Authors: LIM, Ee Peng, LEE, Hou-Kuan
Format: text
Language:English
Published: Institutional Knowledge at Singapore Management University 1999
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Online Access:https://ink.library.smu.edu.sg/sis_research/68
http://doi.org/10.1016/S0950-5849(99)00003-8
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Institution: Singapore Management University
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spelling sg-smu-ink.sis_research-10672018-06-20T04:32:25Z Export database derivation in object-oriented wrappers LIM, Ee Peng LEE, Hou-Kuan Wrappers export the schema and data of existing heterogeneous databases and support queries on them. In the context of cooperative information systems, we present a flexible approach to specify the derivation of object-oriented (OO) export databases from local relational databases. Our export database derivation consists of a set of extent derivation structures (EDS) which defines the extent and deep extent of export classes. Having well-defined semantics, the EDS can be readily used in transforming wrapper queries to local queries. Based on the EDS, we developed a wrapper query evaluation strategy which handles OO queries on the export databases. The strategy is unique in that it considers the limited query processing capabilities of local database systems as well as the language constraints on the local query languages. 1999-03-01T08:00:00Z text https://ink.library.smu.edu.sg/sis_research/68 info:doi/10.1016/S0950-5849(99)00003-8 http://doi.org/10.1016/S0950-5849(99)00003-8 Research Collection School Of Computing and Information Systems eng Institutional Knowledge at Singapore Management University Databases and Information Systems Numerical Analysis and Scientific Computing
institution Singapore Management University
building SMU Libraries
continent Asia
country Singapore
Singapore
content_provider SMU Libraries
collection InK@SMU
language English
topic Databases and Information Systems
Numerical Analysis and Scientific Computing
spellingShingle Databases and Information Systems
Numerical Analysis and Scientific Computing
LIM, Ee Peng
LEE, Hou-Kuan
Export database derivation in object-oriented wrappers
description Wrappers export the schema and data of existing heterogeneous databases and support queries on them. In the context of cooperative information systems, we present a flexible approach to specify the derivation of object-oriented (OO) export databases from local relational databases. Our export database derivation consists of a set of extent derivation structures (EDS) which defines the extent and deep extent of export classes. Having well-defined semantics, the EDS can be readily used in transforming wrapper queries to local queries. Based on the EDS, we developed a wrapper query evaluation strategy which handles OO queries on the export databases. The strategy is unique in that it considers the limited query processing capabilities of local database systems as well as the language constraints on the local query languages.
format text
author LIM, Ee Peng
LEE, Hou-Kuan
author_facet LIM, Ee Peng
LEE, Hou-Kuan
author_sort LIM, Ee Peng
title Export database derivation in object-oriented wrappers
title_short Export database derivation in object-oriented wrappers
title_full Export database derivation in object-oriented wrappers
title_fullStr Export database derivation in object-oriented wrappers
title_full_unstemmed Export database derivation in object-oriented wrappers
title_sort export database derivation in object-oriented wrappers
publisher Institutional Knowledge at Singapore Management University
publishDate 1999
url https://ink.library.smu.edu.sg/sis_research/68
http://doi.org/10.1016/S0950-5849(99)00003-8
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