Schema Versioning: Queries to the Generalized Temporal Database System

Authors:
Viviane Pereira Moreira;Nina Edelweiss
Affiliations:
-;-
Venue:
DEXA '99 Proceedings of the 10th International Workshop on Database & Expert Systems Applications
Year:
1999

Citing 0
Cited 2

Dynamic Schema Evolution Management Using Version in Temporal Object-Oriented Databases

DEXA '02 Proceedings of the 13th International Conference on Database and Expert Systems Applications
Online, asynchronous schema change in F1

Proceedings of the VLDB Endowment

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Abstract

Raw data and database structures are evolving entities that require adequate support for past, present and even future versions. Temporal databases supporting schema versioning were developed with the aim of satisfying this requirement. This poster considers a generalized temporal database system, which provides support for time at both intentional and extensional levels. The support for schema versioning raises two complex subjects: the storage of the several schema versions and their associate data, and the processing of queries involving more than one schema version. The main goal of this poster is to analyze the second aspect in order to propose a strategy to answer multi-schema queries.