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Using Semiouterjoins to Process Queries in Multidatabase Systems

Summary: Use semiouterjoins to optimize queries over multidatabase views defined by outer-joins and aggregates, addressing environments where selections/projections are as costly as joins. Provide linear-time optimizers for selection/projection and heuristics extending to joins and conjunctive queries. (summarized by gpt-5-mini on Feb 09 2026)

Paper ID
693
Venue
PODS
Year
1984
Pagerank
5.093636e-05
Overall Rank
13,231 | 9.23%
DOI
10.1145/588011.588033

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BibTeX Citation

@inproceedings{hwang_pods84,
        address = {New York, NY, USA},
        series = {{PODS} '84},
        title = {{Using Semiouterjoins to Process Queries in Multidatabase Systems}},
        url = {https://dl.acm.org/doi/10.1145/588011.588033},
        doi = {10.1145/588011.588033},
        booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
        publisher = {Association for Computing Machinery},
        author = {Hwang, Hai-Yann and Dayal, Umeshwar and Gouda, Mohamed G.},
        year = {1984}
}

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