Search results for "query optimization"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
6	Qiang Zhu	Query optimization in multidatabase systems.	CASCON	1992	DBLP DOI BibTeX RDF	adaptive query optimization, parametric query optimization, probing query, query processing, multidatabase system, semantic query optimization, distributed query optimization
5	Abdelkader Hameurlain, Franck Morvan	Invited Address: An Overview of Parallel Query Optimization in Relational Systems. (PDF / PS)	DEXA Workshops	2000	DBLP DOI BibTeX RDF	parallel query optimization, parallel relational database systems, static query optimization, dynamic query optimization, statistics extraction, query processing, resource allocation, cost estimation, data placement
4	Dunren Che, Karl Aberer, M. Tamer Özsu	Query optimization in XML structured-document databases.	VLDB J.	2006	DBLP DOI BibTeX RDF	XML query optimization, Deterministic query optimization, XML database, XML query processing, Query transformation
4	Dun-Ren Che	Accomplishing Deterministic XML Query Optimization.	J. Comput. Sci. Technol.	2005	DBLP DOI BibTeX RDF	XML query optimization, structured-document database, query optimization, XML database, XML query
3	Michael Schmidt, Michael Meier 0002, Georg Lausen	Foundations of SPARQL query optimization.	ICDT	2010	DBLP DOI BibTeX RDF	SPARQL algebra, complexity, query optimization, RDF, SPARQL, semantic query optimization
3	Michael Meier 0002, Michael Schmidt, Fang Wei, Georg Lausen	Semantic query optimization in the presence of types.	PODS	2010	DBLP DOI BibTeX RDF	constraints, query optimization, types, chase
3	Abdelkader Hameurlain, Franck Morvan	Evolution of Query Optimization Methods.	T. Large-Scale Data- and Knowledge-Centered Systems	2009	DBLP DOI BibTeX RDF	Parallel and Distributed Databases, Data Grid Systems, Relational Databases, Data Integration, Query Optimization, Large Scale
3	Hongzhi Wang, Jianzhong Li, Xianmin Liu, Jizhou Luo	Query Optimization for Complex Path Queries on XML Data.	DASFAA	2009	DBLP DOI BibTeX RDF	XML, Query Optimization, Path Query
3	Wook-Shin Han, Jinsoo Lee	Dependency-aware reordering for parallelizing query optimization in multi-core CPUs.	SIGMOD Conference	2009	DBLP DOI BibTeX RDF	query optimization, multi-cores, parallel databases
3	Abdelkader Hameurlain	Evolution of Query Optimization Methods: From Centralized Database Systems to Data Grid Systems.	DEXA	2009	DBLP DOI BibTeX RDF	Relational Database Systems Parallel and Distributed Database Systems, Data Integration Systems, Data Grid Systems, Query Optimization, Large Scale
3	Qiang Zhu, Jaidev Haridas, Wen-Chi Hou	Query optimization via contention space partitioning and cost error controlling for dynamic multidatabase systems.	Distributed and Parallel Databases	2008	DBLP DOI BibTeX RDF	Multistate cost model, Execution plan, Algorithm, Query optimization, Dynamic environment, Multidatabase system
3	Nana Li, Yujuan Liu, Yongfeng Dong, Junhua Gu	Application of Ant Colony Optimization Algorithm to Multi-Join Query Optimization.	ISICA	2008	DBLP DOI BibTeX RDF	Multi-join query optimization, ant colony optimization algorithm (ACO), heuristic information, pheromone
3	Lukasz Golab, Theodore Johnson, Oliver Spatscheck	Prefilter: predicate pushdown at streaming speeds.	SSPS	2008	DBLP DOI BibTeX RDF	data stream query optimization, data stream management systems, multi-query optimization
3	Jun-Zhao Sun	Query optimization based on user-specified delay item for wireless sensor networks.	IWCMC	2007	DBLP DOI BibTeX RDF	sensor networks, delay, query optimization
3	Xiaoqing Zheng, Huajun Chen, Zhaohui Wu, Yuxin Mao	Dynamic Query Optimization Approach for Semantic Database Grid.	J. Comput. Sci. Technol.	2006	DBLP DOI BibTeX RDF	semantic database grid, query optimization, database integration
3	B. John Oommen, Jing Chen	On Enhancing Query Optimization in the Oracle Database System by Utilizing Attribute Cardinality Maps.	ICEIS (Selected Papers)	2006	DBLP DOI BibTeX RDF	Histogram-based Algorithms, Attribute Cardinality Maps, ORACLE DBMS, TPC-H benchmark, Query Optimization
3	Hicham G. Elmongui, Mourad Ouzzani, Walid G. Aref	Challenges in spatiotemporal stream query optimization.	MobiDE	2006	DBLP DOI BibTeX RDF	multi-predicate, query optimization, spatio-temporal
3	Rada Chirkova, Fereidoon Sadri	Query optimization using restructured views.	CIKM	2006	DBLP DOI BibTeX RDF	restructured views, query optimization, materialized views
3	Steven David Prestwich, Stéphane Bressan	A SAT approach to query optimization in mediator systems.	Ann. Math. Artif. Intell.	2005	DBLP DOI BibTeX RDF	search, query optimization, symmetry, mediator systems
3	Lakshmi Priya Mahalingam, K. Selçuk Candan	Multi-Criteria Query Optimization in the Presence of Result Size and Quality Tradeoffs.	Multimedia Tools Appl.	2004	DBLP DOI BibTeX RDF	quality-based optimization, similarity-based optimization, query optimization, multimedia databases, multi-criteria optimization, top-k retrieval
3	Yahya Slimani, Faïza Najjar, Najla Mami	An Adaptive Cost Model for Distributed Query Optimization on the Grid.	OTM Workshops	2004	DBLP DOI BibTeX RDF	Grid computing, Distributed databases, Cost model, Beowulf clusters, Distributed query optimization
3	Jamal R. Alsabbagh, Vijay V. Raghavan	A Model for Multiple-Query Processing Based upon Strong Factoring.	ITCC	2004	DBLP DOI BibTeX RDF	global Query Optimization, Database Management Systems, Multi-Query Optimization, Common Subexpressions, Multiple Query Optimization
3	Domenico Beneventano, Sonia Bergamaschi, Claudio Sartori	Description logics for semantic query optimization in object-oriented database systems.	ACM Trans. Database Syst.	2003	DBLP DOI BibTeX RDF	integrity constraints rules, query rewriting method, semantic expansion of a query, description logics, subsumption, Semantic query optimization
3	Rajeswari Malladi, Karen C. Davis	Applying Multiple Query Optimization in Mobile Databases. (PDF / PS)	HICSS	2003	DBLP DOI BibTeX RDF	mobile database, data broadcast, multiple query optimization
3	Dennis Pedersen, Karsten Riis, Torben Bach Pedersen	Query optimization for OLAP-XML federations.	DOLAP	2002	DBLP DOI BibTeX RDF	database federations, XML, query optimization, OLAP
3	Amol Deshpande, Joseph M. Hellerstein	Decoupled Query Optimization for Federated Database Systems.	ICDE	2002	DBLP DOI BibTeX RDF	query optimization, federated databases
3	Giedrius Slivinskas, Christian S. Jensen, Richard T. Snodgrass	A Foundation for Conventional and Temporal Query Optimization Addressing Duplicates and Ordering.	IEEE Trans. Knowl. Data Eng.	2001	DBLP DOI BibTeX RDF	temporal algebra, query optimization, Temporal databases, transformation rules, duplicate elimination, coalescing
3	John Grant, Jarek Gryz, Jack Minker, Louiqa Raschid	Logic-Based Query Optimization for Object Databases.	IEEE Trans. Knowl. Data Eng.	2000	DBLP DOI BibTeX RDF	logic query, methods in object DBMS, object DBMS, semantic query optimization (SQO), semantic residues, Datalog, integrity constraints, OQL, ODL, ODMG
3	Chun-Nan Hsu, Craig A. Knoblock	Semantic Query Optimization for Query Plans of Heterogeneous Multidatabase Systems.	IEEE Trans. Knowl. Data Eng.	2000	DBLP DOI BibTeX RDF	heterogeneous multidatabase systems, relational rules, information mediators, joins, Semantic query optimization
3	Donald Kossmann, Konrad Stocker	Iterative dynamic programming: a new class of query optimization algorithms.	ACM Trans. Database Syst.	2000	DBLP DOI BibTeX RDF	iterative dynamic programming, plan evaluation function, randomized optimization, dynamic programming, query optimization, greedy algorithm
3	Donald Kossmann, Michael J. Franklin, Gerhard Drasch	Cache investment: integrating query optimization and distributed data placement.	ACM Trans. Database Syst.	2000	DBLP DOI BibTeX RDF	cache investment, client-server database systems, dynamic data placement, query shipping, caching, query optimization, data shipping
3	Dunren Che, Karl Aberer	A Heuristics-Based Approach to Query Optimization in Structured Document Databases. (PDF / PS)	IDEAS	1999	DBLP DOI BibTeX RDF	SGML-document, Query optimization, document management, structured document, document database
3	Qiang Zhu, Brian Dunkel, Nandit Soparkar, Suyun Chen, Berni Schiefer, Tony Lai	A piggyback method to collect statistics for query optimization in database management systems.	CASCON	1998	DBLP DOI BibTeX RDF	piggyback analysis, statistics collection, query optimization, database management system, cost estimation, access method
3	Chiang Lee, Chia-Jung Chen	Query Optimization in Multidatabase Systems Considering Schema Conflicts.	IEEE Trans. Knowl. Data Eng.	1997	DBLP DOI BibTeX RDF	schema conflicts, interoperability, query optimization, autonomous systems, heterogeneous databases, Multidatabase systems
3	Parke Godfrey, Jarek Gryz, Jack Minker	Semantic Query Optimization for Bottom-Up Evaluation.	ISMIS	1996	DBLP DOI BibTeX RDF	Databases, Intelligent Information Systems, Semantic Query Optimization
3	Wei Sun 0002, Clement T. Yu	Semantic Query Optimization for Tree and Chain Queries.	IEEE Trans. Knowl. Data Eng.	1994	DBLP DOI BibTeX RDF	chain queries, knowledge-based query optimization, semantically equivalent transformations, unnecessary joins, redundant beneficial/nonbeneficial selection operations, acyclic queries, closure chain queries, equi-join attributes, restriction closure computation, computational complexity, query processing, knowledge based systems, NP complete, time complexity, database theory, trees (mathematics), semantic query optimization, query graphs, tree queries
3	P. E. Drenick, E. J. Smith	Stochastic Query Optimization in Distributed Databases.	ACM Trans. Database Syst.	1993	DBLP DOI BibTeX RDF	stochastic query optimization, distributed query processing, state-transition model
3	Qiang Zhu, Per-Åke Larson	Query optimization using fuzzy set theory for multidatabase systems.	CASCON	1993	DBLP DOI BibTeX RDF	query optimization, fuzzy set, multidatabase system, fuzzy optimization
2	Yinian Qi, Rohit Jain, Sarvjeet Singh, Sunil Prabhakar	Threshold query optimization for uncertain data.	SIGMOD Conference	2010	DBLP DOI BibTeX RDF	threshold queries, query optimization, uncertain data, probabilistic data
2	Daniel M. Kane, Jelani Nelson, David P. Woodruff	An optimal algorithm for the distinct elements problem.	PODS	2010	DBLP DOI BibTeX RDF	distinct elements, data mining, streaming, query optimization
2	Senlin Liang, Michael Kifer	Deriving predicate statistics in datalog.	PPDP	2010	DBLP DOI BibTeX RDF	argument dependency, derived predicate statistics, query optimization, cost estimate
2	Scott M. Meyer, Jutta Degener, John Giannandrea, Barak Michener	Optimizing schema-last tuple-store queries in graphd.	SIGMOD Conference	2010	DBLP DOI BibTeX RDF	graph store, schema-last, tuple-store, database, object-oriented, query optimization, triple-store
2	Yohan J. Roh, Jae Ho Kim, Yon Dohn Chung, Jin Hyun Son, Myoung-Ho Kim	Hierarchically organized skew-tolerant histograms for geographic data objects.	SIGMOD Conference	2010	DBLP DOI BibTeX RDF	query optimization, spatial databases, histograms
2	Pedro Bizarro, Nicolas Bruno, David J. DeWitt	Progressive Parametric Query Optimization.	IEEE Trans. Knowl. Data Eng.	2009	DBLP DOI BibTeX RDF
2	Sangeetha Seshadri, Vibhore Kumar, Brian F. Cooper, Ling Liu	A Distributed Stream Query Optimization Framework through Integrated Planning and Deployment.	IEEE Trans. Parallel Distrib. Syst.	2009	DBLP DOI BibTeX RDF
2	Hicham G. Elmongui	Query optimization for spatio-temporal data stream management systems.	SIGSPATIAL Special	2009	DBLP DOI BibTeX RDF	multi-predicate, query optimization, spatio-temporal
2		Adaptive Query Optimization.	Encyclopedia of Database Systems	2009	DBLP DOI BibTeX RDF
2		Multiple Query Optimization.	Encyclopedia of Database Systems	2009	DBLP DOI BibTeX RDF
2		Query Optimization for Multidimensional Systems.	Encyclopedia of Database Systems	2009	DBLP DOI BibTeX RDF
2		Query Optimization in Distributed Database Systems.	Encyclopedia of Database Systems	2009	DBLP DOI BibTeX RDF
2		Global Query Optimization.	Encyclopedia of Database Systems	2009	DBLP DOI BibTeX RDF
2	Jie Yang 0005, Jie Wang	Routing-Aware Query Optimization for Conserving Energy in Wireless Sensor Networks.	WASA	2009	DBLP DOI BibTeX RDF
2	Saikat Mukherjee, Srinath Srinivasa, Krithi Ramamritham	An autonomous agent approach to query optimization in stream grids.	MEDES	2009	DBLP DOI BibTeX RDF	emergent optimization, open-world systems, stream query processing
2	Shuang Wang, Zhenhua Tan, Xiaoxing Gao	Query Optimization over Distributed Data Stream.	HIS	2009	DBLP DOI BibTeX RDF	group by query, distributed system, data stream, aggregation, multi-query optimization
2	Mingsheng Hong, Mirek Riedewald, Christoph Koch, Johannes Gehrke, Alan J. Demers	Rule-based multi-query optimization.	EDBT	2009	DBLP DOI BibTeX RDF
2	Nicolas Bruno, Surajit Chaudhuri, Ravishankar Ramamurthy	Interactive plan hints for query optimization.	SIGMOD Conference	2009	DBLP DOI BibTeX RDF	query hinting, query optimization
2	Jiahong Liu, Quanyuan Wu, Wei Liu	Temporal Restriction Query Optimization for Event Stream Processing.	APWeb/WAIM Workshops	2009	DBLP DOI BibTeX RDF
2	Tarcizio Alexandre Bini, Adriano Lange, Marcos Sfair Sunyé, Fabiano Silva	Stableness in large join query optimization.	ISCIS	2009	DBLP DOI BibTeX RDF
2	Andreas M. Weiner, Theo Härder	Using Structural Joins and Holistic Twig Joins for Native XML Query Optimization.	ADBIS	2009	DBLP DOI BibTeX RDF
2	Hong Kyu Park, Se Jung Shin, Sang Hyuck Na, Won Suk Lee	M-COPE: a multiple continuous query processing engine.	CIKM	2009	DBLP DOI BibTeX RDF	data stream, DSMS, multiple query optimization
2	Jianting Zhang, Michael Gertz, Le Gruenwald	Efficiently managing large-scale raster species distribution data in PostgreSQL.	GIS	2009	DBLP DOI BibTeX RDF	species distribution data, window query decomposition, query optimization, quadtrees, PostgreSQL
2	Allison W. Lee, Mohamed Zaït, Thierry Cruanes, Rafi Ahmed, Yali Zhu	Validating the Oracle SQL engine.	DBTest	2009	DBLP DOI BibTeX RDF	execution plan, test, SQL, validation, query optimization, database systems, Oracle
2	Thomas Neumann	Query simplification: graceful degradation for join-order optimization.	SIGMOD Conference	2009	DBLP DOI BibTeX RDF	complex joins, query optimization, hypergraphs
2	Florian M. Waas, Joseph M. Hellerstein	Parallelizing extensible query optimizers.	SIGMOD Conference	2009	DBLP DOI BibTeX RDF	depedencies, parallel processing, query optimization, multicore, erlang
2	Anne Condon, Amol Deshpande, Lisa Hellerstein, Ning Wu	Algorithms for distributional and adversarial pipelined filter ordering problems.	ACM Transactions on Algorithms	2009	DBLP DOI BibTeX RDF	Pipelined filter ordering, flow algorithms, selection ordering, query optimization
2	Yao-Chung Fan, Arbee L. P. Chen	An Approximation Algorithm for Optimizing Multiple Path Tracking Queries over Sensor Data Streams.	DEXA	2009	DBLP DOI BibTeX RDF	Sensor Network, Query Processing, Distributed Database, Query Optimization
2	Bin Cao, Antonio Badia	Exploiting maximal redundancy to optimize SQL queries.	Knowl. Inf. Syst.	2009	DBLP DOI BibTeX RDF	Intra-query redundancy, Query optimization, Nested queries
2	Mikolaj Morzy, Marcin Krystek	Mining Conditional Cardinality Patterns for Data Warehouse Query Optimization.	DaWaK	2008	DBLP DOI BibTeX RDF
2	Chun Jin, Jaime G. Carbonell	Predicate Indexing for Incremental Multi-Query Optimization.	ISMIS	2008	DBLP DOI BibTeX RDF
2	Amol Deshpande, Lisa Hellerstein	Flow Algorithms for Parallel Query Optimization.	ICDE	2008	DBLP DOI BibTeX RDF
2	Ixent Galpin, Christian Y. A. Brenninkmeijer, Farhana Jabeen, Alvaro A. A. Fernandes, Norman W. Paton	An Architecture for Query Optimization in Sensor Networks.	ICDE	2008	DBLP DOI BibTeX RDF
2	Ruoming Jin, David Fuhry, Abdulkareem Alali	Cost-based query optimization for complex pattern mining on multiple databases.	EDBT	2008	DBLP DOI BibTeX RDF
2	Yufei Bai, Xiujun Ma, Kunqing Xie, Cuo Cai, Ke Li	Agent-Based Spatial Query Optimization in a Grid Environment.	CSSE	2008	DBLP DOI BibTeX RDF
2	Nicolas Bruno, Rimma V. Nehme	Configuration-parametric query optimization for physical design tuning.	SIGMOD Conference	2008	DBLP DOI BibTeX RDF	physical design tuning, parametric optimization
2	Srikumar Krishnamoorthy, Avdhoot Kishore Saple, Prahalad Haldhoderi Achutharao	An integrated query optimization system for data grids.	Bangalore Compute Conf.	2008	DBLP DOI BibTeX RDF
2	Yi Zhuang, Qing Li, Lei Chen 0002	Multi-query Optimization for Distributed Similarity Query Processing.	ICDCS	2008	DBLP DOI BibTeX RDF
2	Yongluan Zhou, Karl Aberer, Kian-Lee Tan	Toward Massive Query Optimization in Large-Scale Distributed Stream Systems.	Middleware	2008	DBLP DOI BibTeX RDF	Distributed Stream Systems, Load Balance, Query Optimization, Overlay Network, Publish/Subscribe Systems
2	Hendrik Decker	Extending Inconsistency-Tolerant Integrity Checking by Semantic Query Optimization.	DEXA	2008	DBLP DOI BibTeX RDF
2	Krishna Raman, Yue Zhang 0001, Mark Panahi, Kwei-Jay Lin	Customizable Business Process Composition with Query Optimization.	CEC/EEE	2008	DBLP DOI BibTeX RDF
2	Andrey Balmin, Fatma Özcan, Ashutosh Singh, Edison Ting	Grouping and optimization of XPath expressions in DB2 pureXML.	SIGMOD Conference	2008	DBLP DOI BibTeX RDF	xml query optimization, xpath and xquery processing
2	Cheng Luo, Zhewei Jiang, Wen-Chi Hou, Feng Yan, Qiang Zhu	A relational model for XML structural joins and their size estimations.	Knowl. Inf. Syst.	2008	DBLP DOI BibTeX RDF	Semi-structured databases, Query optimization, XML databases, Selectivity estimation
2	Roberto Cornacchia, Sándor Héman, Marcin Zukowski, Arjen P. de Vries, Peter A. Boncz	Flexible and efficient IR using array databases.	VLDB J.	2008	DBLP DOI BibTeX RDF	Array databases, Information retrieval, Query optimization, Database compression
2	Murat Ali Bayir, Ismail Hakki Toroslu, Ahmet Cosar	Genetic Algorithm for the Multiple-Query Optimization Problem.	IEEE Transactions on Systems, Man, and Cybernetics, Part C	2007	DBLP DOI BibTeX RDF
2	Hongbin Dong, Yiwen Liang	Genetic algorithms for large join query optimization.	GECCO	2007	DBLP DOI BibTeX RDF	genetic algorithm, optimization, query model, large join query
2	Jun-Zhao Sun	Using Packet Combination in Multi-query Optimization for Data Collection in Sensor Networks.	MSN	2007	DBLP DOI BibTeX RDF	delay-aware, Sensor networks, energy-efficient, data collection, multi-query optimization
2	Lucantonio Ghionna, Luigi Granata, Gianluigi Greco, Francesco Scarcello	Hypertree Decompositions for Query Optimization.	ICDE	2007	DBLP DOI BibTeX RDF
2	Egemen Tanin, Songting Chen, Jun'ichi Tatemura, Wang-Pin Hsiung	Application semantics in query optimization for WSNs.	SenSys	2007	DBLP DOI BibTeX RDF	sensor data management, semantic query optimization
2	Mahmoud El Samad, Abdelkader Hameurlain, Franck Morvan	Resource Discovery and Selection for Large Scale Query Optimization in a Grid Environment.	SCSS	2007	DBLP DOI BibTeX RDF
2	Ali-Asghar Safaeei, Mehran Kamali, Mostafa Haghjoo, Kamyar Izadi	Caching Intermediate Results for Multiple-Query Optimization.	AICCSA	2007	DBLP DOI BibTeX RDF
2	Shili Xiang, Hock-Beng Lim, Kian-Lee Tan, Yongluan Zhou	Two-Tier Multiple Query Optimization for Sensor Networks.	ICDCS	2007	DBLP DOI BibTeX RDF
2	Mônica Ribeiro Porto Ferreira, Caetano Traina Jr., Agma J. M. Traina	An efficient framework for similarity query optimization.	GIS	2007	DBLP DOI BibTeX RDF	similarity algebra, query processing, query optimization
2	Pavel Krömer, Václav Snásel, Jan Platos, Suhail S. J. Owais	Implicit User Modelling for Query Optimization.	DEXA Workshops	2007	DBLP DOI BibTeX RDF
2	Per-Åke Larson, Wolfgang Lehner, Jingren Zhou, Peter Zabback	Exploiting self-monitoring sample views for cardinality estimation.	SIGMOD Conference	2007	DBLP DOI BibTeX RDF	sample views, query optimization, cardinality estimation, statistical quality control, sequential sampling
2	Per-Åke Larson, Wolfgang Lehner, Jingren Zhou, Peter Zabback	Cardinality estimation using sample views with quality assurance.	SIGMOD Conference	2007	DBLP DOI BibTeX RDF	sample views, query optimization, cardinality estimation, statistical quality control, sequential sampling
2	Tianxiao Liu, Tuyet-Tram Dang-Ngoc, Dominique Laurent	Cost Framework for a Heterogeneous Distributed Semi-structured Environment.	APWeb/WAIM Workshops	2007	DBLP DOI BibTeX RDF	Tree Graph View, cost annotation, query optimization, cost model, Mediation system
2	Chong Sun, Yansheng Lu, Chong Zhou, Jun Liu	Wavelet Synopsis: Setting Unselected Coefficients to Zero Is Not Optimal.	DEXA	2007	DBLP DOI BibTeX RDF	wavelet synopsis, query optimization, data reduction, error measure
2	Fragkiskos Pentaris, Yannis E. Ioannidis	Query optimization in distributed networks of autonomous database systems.	ACM Trans. Database Syst.	2006	DBLP DOI BibTeX RDF	Query optimization
2	Ihab F. Ilyas, Walid G. Aref, Ahmed K. Elmagarmid, Hicham G. Elmongui, Rahul Shah, Jeffrey Scott Vitter	Adaptive rank-aware query optimization in relational databases.	ACM Trans. Database Syst.	2006	DBLP DOI BibTeX RDF	Advanced query processing, rank-aware optimization, ranking, top-k, adaptive processing
2	Ziqiang Wang, Xin Li, Dexian Zhang, Feng Wu	A PSO-Based Web Document Query Optimization Algorithm.	ASWC	2006	DBLP DOI BibTeX RDF
2	Stephan Ewen, Holger Kache, Volker Markl, Vijayshankar Raman	Progressive Query Optimization for Federated Queries.	EDBT	2006	DBLP DOI BibTeX RDF