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| Type | Conference or Workshop Paper |
| Scope | Discipline-based scholarship |
| Published in Proceedings | Yes |
| Title | Versioned relations: Support for conditional schema changes and schema versioning |
| Organization Unit | |
| Authors |
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| Presentation Type | paper |
| Item Subtype | Original Work |
| Refereed | Yes |
| Status | Published in final form |
| Language |
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| ISBN | 978-3-540-71702-7 |
| ISSN | 0302-9743 |
| Page Range | 1058 - 1061 |
| Event Title | DASFAA 2007: Support for Conditional Schema Changes and Schema Versioning; Lecture Notes in Computer Science Volume 4443/2008 page 1058-1061, ISBN 978-3-540-71702-7 |
| Event Type | conference |
| Event Location | Bangkok, Thailand |
| Event Start Date | April 9 - 2007 |
| Event End Date | April 12 - 2007 |
| Series Name | Lecture Notes in Computer Science |
| Number | 4443 |
| Publisher | Springer |
| Abstract Text | We introduce the versioned relational data model, which allows a user to apply conditional schema changes to a populated database without breaking applications compiled against an existing schema, and without loss of existing data. Our model is based on keeping a history of conditional schema changes, and converting tuples on demand to fit the correct schema in any schema version. We provide a concrete defnition of schema versioning: The ability to specify an operator on any schema version, such that the tuples in the result are unaffected by schema versions created after the specified schema version. Finally, we show that our model supports schema versioning. |
| Digital Object Identifier | 10.1007/978-3-540-71703-4_104 |
| Other Identification Number | merlin-id:2929 |
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