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Efficient Evaluation of Queries in a Mediator for WebSources

Summary: Two-phase Web Query Optimizer (WQO) for mediators over WebSources with capabilities and costs; pre-optimization selects WSIs to form pre-plans. The extended optimizer refines the chosen pre-plan; prototype experiments show cost-based heuristics efficiently navigate large plan spaces in noisy Internet environments. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID
h29bf623ee2c0a58c
Venue
SIGMOD
Year
2002
Pagerank
5.6315833e-05
Overall Rank
6,969 | 53.15%
DOI
10.1145/564691.564702

Incoming Non-self Citations Over Time

Authors

BibTeX Citation

@inproceedings{zadorozhny_sigmod02,
        title = {{Efficient Evaluation of Queries in a Mediator for WebSources}},
        author = {Zadorozhny, Vladimir and Raschid, Louiqa and Vidal, Maria Esther and Urhan, Tolga and Bright, Laura},
        series = {{SIGMOD} '02},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/564691.564702},
        url = {https://dl.acm.org/doi/10.1145/564691.564702},
        year = {2002}
}

Incoming Citations (Sorted by Pagerank)

Showing 4 of 4 citing papers.

Rank Citing Paper Year Venue Pagerank
2,616 Query Optimization over Web Services 2006 VLDB 8.2253465e-05
4,045 Adaptive Query Processing in the Looking Glass 2005 CIDR 6.8328968e-05
5,426 Active Knowledge: Dynamically Enriching RDF Knowledge Bases by Web Services 2010 SIGMOD 6.1342038e-05
14,176 AReNA: Adaptive Distributed Catalog Infrastructure Based On Relevance Networks 2005 VLDB -
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Outgoing Citations (Sorted by Pagerank)

Showing 18 of 18 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank Cited Paper Year Venue Pagerank
1 Access Path Selection in a Relational Database Management System 1979 SIGMOD 0.0023947656
25 NiagaraCQ: A Scalable Continuous Query System for Internet Databases 2000 SIGMOD 0.00053930011
53 Eddies: Continuously Adaptive Query Processing 2000 SIGMOD 0.00040860054
117 Querying Heterogeneous Information Sources Using Source Descriptions 1996 VLDB 0.00031630695
135 Ripple Joins for Online Aggregation 1999 SIGMOD 0.00029866033
173 Optimizing Queries across Diverse Data Sources 1997 VLDB 0.00026826959
334 An Adaptive Query Execution System for Data Integration* 1999 SIGMOD 0.00020691326
399 Query Caching and Optimization in Distributed Mediator Systems 1996 SIGMOD 0.00019143706
424 Cost-based Query Scrambling for Initial Delays 1998 SIGMOD 0.0001848836
487 Randomized Algorithms For Optimizing Large Join Queries 1990 SIGMOD 0.00017462723
689 Query Optimization in the Presence of Foreign Functions 1993 VLDB 0.00014752546
869 Query Optimization in the Presence of Limited Access Patterns 1999 SIGMOD 0.00013348278
1,130 WSQ/DSQ: A Practical Approach for Combined Querying of Databases and the Web* 2000 SIGMOD 0.00011902078
1,623 Query Optimization in Heterogeneous DBMS 1992 VLDB 0.00010045919
1,796 Dynamic Pipeline Scheduling for Improving Interactive Query Performance 2001 VLDB 9.6193021e-05
2,571 The Case for Enhanced Abstract Data Types 1997 VLDB 8.2840962e-05
3,620 Describing and Using Query Capabilities of Heterogeneous Sources 1997 VLDB 7.1548155e-05
4,773 Cost Models DO Matter: Providing Cost Information for Diverse Data Sources in a Federated System 1999 VLDB 6.4212044e-05
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