An Extended Relational Algebra with Control Over Duplicate Elimination
Summary: Extends relational algebra to multiset relations with explicit control over duplicate elimination, and frames queries in extended algebra, tableaux, and DAPLEX. Proves conjunctive-equivalence decidable via tableaux but NP-complete, and shows extended algebra and DAPLEX have essentially the same conjunctive expressiveness. (summarized by gpt-5-mini on Feb 09 2026)
Incoming Non-self Citations Over Time
Authors
- 1. Umeshwar Dayal (Computer Corporation of America)
- 2. Nathan Goodman (Computer Corporation of America)
- 3. Randy H. Katz (Computer Corporation of America)
BibTeX Citation
@inproceedings{dayal_pods82,
address = {New York, NY, USA},
series = {{PODS} '82},
title = {{An Extended Relational Algebra with Control Over Duplicate Elimination}},
url = {https://dl.acm.org/doi/10.1145/588111.588132},
doi = {10.1145/588111.588132},
booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
publisher = {Association for Computing Machinery},
author = {Dayal, Umeshwar and Goodman, Nathan and Katz, Randy H.},
year = {1982}
}
Incoming Citations (Sorted by Pagerank)
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Outgoing Citations (Sorted by Pagerank)
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Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 15 | The Functional Data Model and the Data Language DAPLEX | 1979 | SIGMOD | 0.00061144858 |
| 97 | Efficient Optimization of a Class of Relational Expressions | 1978 | SIGMOD | 0.00034574497 |
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