A view definition and query translation system for a high-level data model

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dc.contributor.advisorElmasri, Ramez A.
dc.contributor.committeeMemberLeiss, Ernst L.
dc.contributor.committeeMemberScamell, Richard W.
dc.creatorWang, Yu-Chueh Alice
dc.date.accessioned2023-10-04T16:13:03Z
dc.date.available2023-10-04T16:13:03Z
dc.date.issued1984
dc.description.abstractThe purpose of this thesis is to design and implement a view definition and query translation system for Views on the Entity Category Relationship (ECR) model using GORDAS, a high level database language. Currently there are two possible approaches for schema design: top-down and bottom-up. Here the bottom-up approach is adopted. This means the external schemas/views are built upon the existing conceptual schema. In our implementation, GORDAS is extended to support view definitions for the ECR model. The technique of query modification is used to translate GORDAS queries against an ECR external schema into equivalent GORDAS commands against an ECR conceptual schema. The approach is based on that proposed for relational query languages, with differences due to the ECR model's support for entity sets and functional interrelationships.
dc.description.departmentComputer Science, Department of
dc.format.digitalOriginreformatted digital
dc.format.mimetypeapplication/pdf
dc.identifier.other12137831
dc.identifier.urihttps://hdl.handle.net/10657/15149
dc.language.isoen
dc.rightsThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.
dc.subjectDatabase management
dc.subjectComputers--Access control
dc.titleA view definition and query translation system for a high-level data model
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.collegeCollege of Natural Sciences and Mathematics
thesis.degree.departmentComputer Science, Department of
thesis.degree.disciplineComputer Science
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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