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Type | Journal Article |
Scope | Discipline-based scholarship |
Title | Snapshot Semantics for Temporal Multiset Relations |
Organization Unit | |
Authors |
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Item Subtype | Original Work |
Refereed | Yes |
Status | Published in final form |
Language |
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Journal Title | Proceedings of the VLDB Endowment |
Publisher | Association for Computing Machinery |
Geographical Reach | international |
ISSN | 2150-8097 |
Volume | 12 |
Number | 6 |
Page Range | 639 - 652 |
Date | 2019 |
Abstract Text | Snapshot semantics is widely used for evaluating queries over temporal data: temporal relations are seen as sequences of snapshot relations, and queries are evaluated at each snapshot. In this work, we demonstrate that current approaches for snapshot semantics over interval-timestamped multiset relations are subject to two bugs regarding snapshot aggregation and bag difference. We introduce a novel temporal data model based on K-relations that overcomes these bugs and prove it to correctly encode snapshot semantics. Furthermore, we present an efficient implementation of our model as a database middleware and demonstrate experimentally that our approach is competitive with native implementations. |
Related URLs | |
Digital Object Identifier | 10.14778/3311880.3311882 |
Other Identification Number | merlin-id:18927 |
PDF File | Download from ZORA |
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