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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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 |
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Databases and Information Systems Numerical Analysis and Scientific Computing LIM, Ee Peng LEE, Hou-Kuan Export database derivation in object-oriented wrappers |
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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. |
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LIM, Ee Peng LEE, Hou-Kuan |
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LIM, Ee Peng LEE, Hou-Kuan |
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LIM, Ee Peng |
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Export database derivation in object-oriented wrappers |
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Export database derivation in object-oriented wrappers |
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Export database derivation in object-oriented wrappers |
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Export database derivation in object-oriented wrappers |
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Export database derivation in object-oriented wrappers |
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export database derivation in object-oriented wrappers |
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Institutional Knowledge at Singapore Management University |
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1999 |
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https://ink.library.smu.edu.sg/sis_research/68 http://doi.org/10.1016/S0950-5849(99)00003-8 |
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