Jef Wijsen

According to our database, Jef Wijsen authored at least 73 papers between 1993 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2023

LinCQA: Faster Consistent Query Answering with Linear Time Guarantees.

Zhiwei Fan, Paraschos Koutris, Xiating Ouyang, Jef Wijsen

Proc. ACM Manag. Data, 2023

Consistent Query Answering for Primary Keys on Rooted Tree Queries.

Paraschos Koutris, Xiating Ouyang, Jef Wijsen

CoRR, 2023

Consistent Query Answering for Primary Keys and Conjunctive Queries with Counting.

Aziz Amezian El Khalfioui, Jef Wijsen

Proceedings of the 26th International Conference on Database Theory, 2023

2022

A Dichotomy in Consistent Query Answering for Primary Keys and Unary Foreign Keys.

Miika Hannula, Jef Wijsen

Proceedings of the PODS '22: International Conference on Management of Data, Philadelphia, PA, USA, June 12, 2022

Computing H-Partitions in ASP and Datalog.

Chloé Capon, Nicolas Lecomte, Jef Wijsen

Proceedings of the International Conference on Logic Programming 2022 Workshops co-located with the 38th International Conference on Logic Programming (ICLP 2022), Haifa, Israel, July 31st, 2022

2021

Consistent Query Answering for Primary Keys in Datalog.

Paraschos Koutris, Jef Wijsen

Theory Comput. Syst., 2021

Counting subset repairs with functional dependencies.

Ester Livshits, Benny Kimelfeld, Jef Wijsen

J. Comput. Syst. Sci., 2021

Consistent Query Answering for Primary Keys on Path Queries.

Paraschos Koutris, Xiating Ouyang, Jef Wijsen

Proceedings of the PODS'21: Proceedings of the 40th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems, 2021

Generalized Weighted Repairs.

Horacio Tellez Perez, Jef Wijsen

Proceedings of the Flexible Query Answering Systems - 14th International Conference, 2021

2020

First-Order Rewritability in Consistent Query Answering with Respect to Multiple Keys.

Paraschos Koutris, Jef Wijsen

Proceedings of the 39th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems, 2020

Logic-Based Ranking of Assertions in Inconsistent ABoxes.

Horacio Tellez Perez, Jef Wijsen

Proceedings of the 33rd International Workshop on Description Logics (DL 2020) co-located with the 17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020), 2020

Optimization of Answer Set Programs for Consistent Query Answering by Means of First-Order Rewriting.

Aziz Amezian El Khalfioui, Jonathan Joertz, Dorian Labeeuw, Gaëtan Staquet, Jef Wijsen

Proceedings of the CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, 2020

2019

Special issue on Temporal Representation and Reasoning (TIME 2017).

Sven Schewe, Thomas Schneider, Jef Wijsen

Theor. Comput. Sci., 2019

Foundations of Query Answering on Inconsistent Databases.

Jef Wijsen

SIGMOD Rec., 2019

Calculi for symmetric queries.

Marc Gyssens, Jelle Hellings, Jan Paredaens, Dirk Van Gucht, Jef Wijsen, Yuqing Wu

J. Comput. Syst. Sci., 2019

Corrigendum to "Counting Database Repairs that Satisfy Conjunctive Queries with Self-Joins".

Jef Wijsen

CoRR, 2019

Consistent Query Answering for Primary Keys in Logspace.

Paraschos Koutris, Jef Wijsen

Proceedings of the 22nd International Conference on Database Theory, 2019

Connecting Databases and Ontologies: A Data Quality Perspective.

Horacio Tellez Perez, Jef Wijsen

Proceedings of the 32nd International Workshop on Description Logics, 2019

2018

Temporal Integrity Constraints.

Jef Wijsen

Proceedings of the Encyclopedia of Database Systems, Second Edition, 2018

Temporal Dependencies.

Jef Wijsen

Proceedings of the Encyclopedia of Database Systems, Second Edition, 2018

Consistent Query Answering for Primary Keys and Conjunctive Queries with Negated Atoms.

Paraschos Koutris, Jef Wijsen

Proceedings of the 37th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems, 2018

2017

Consistent Query Answering for Self-Join-Free Conjunctive Queries Under Primary Key Constraints.

Paraschos Koutris, Jef Wijsen

ACM Trans. Database Syst., 2017

First-order under-approximations of consistent query answers.

Floris Geerts, Fabian Pijcke, Jef Wijsen

Int. J. Approx. Reason., 2017

2016

Consistent Query Answering for Primary Keys.

Paraschos Koutris, Jef Wijsen

SIGMOD Rec., 2016

Consistent Query Answering for Atemporal Constraints over Temporal Databases.

Jan Chomicki, Jef Wijsen

Proceedings of the 23rd International Symposium on Temporal Representation and Reasoning, 2016

2015

A Trichotomy in the Data Complexity of Certain Query Answering for Conjunctive Queries.

Paraschos Koutris, Jef Wijsen

CoRR, 2015

The Data Complexity of Consistent Query Answering for Self-Join-Free Conjunctive Queries Under Primary Key Constraints.

Paraschos Koutris, Jef Wijsen

Proceedings of the 34th ACM Symposium on Principles of Database Systems, 2015

2014

Certain Query Answering in Partially Consistent Databases.

Sergio Greco, Fabian Pijcke, Jef Wijsen

Proc. VLDB Endow., 2014

Counting Database Repairs that Satisfy Conjunctive Queries with Self-Joins.

Dany Maslowski, Jef Wijsen

Proceedings of the Proc. 17th International Conference on Database Theory (ICDT), 2014

A Survey of the Data Complexity of Consistent Query Answering under Key Constraints.

Jef Wijsen

Proceedings of the Foundations of Information and Knowledge Systems, 2014

2013

An Approach towards the Study of Symmetric Queries.

Marc Gyssens, Jan Paredaens, Dirk Van Gucht, Jef Wijsen, Yuqing Wu

Proc. VLDB Endow., 2013

A dichotomy in the complexity of counting database repairs.

Dany Maslowski, Jef Wijsen

J. Comput. Syst. Sci., 2013

Charting the tractability frontier of certain conjunctive query answering.

Jef Wijsen

Proceedings of the 32nd ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, 2013

2012

Certain conjunctive query answering in first-order logic.

Jef Wijsen

ACM Trans. Database Syst., 2012

Determining the Currency of Data.

Wenfei Fan, Floris Geerts, Jef Wijsen

ACM Trans. Database Syst., 2012

An aperiodicity problem for multiwords.

Véronique Bruyère, Olivier Carton, Alexandre Decan, Olivier Gauwin, Jef Wijsen

RAIRO Theor. Informatics Appl., 2012

Certain Conjunctive Query Answering in SQL.

Alexandre Decan, Fabian Pijcke, Jef Wijsen

Proceedings of the Scalable Uncertainty Management - 6th International Conference, 2012

2011

Towards a Foundation of Data Currency.

Jef Wijsen

Proceedings of the Eighteenth International Symposium on Temporal Representation and Reasoning, 2011

On counting database repairs.

Dany Maslowski, Jef Wijsen

Proceedings of the 4th International Workshop on Logic in Databases, 2011

On Armstrong-compliant logical query languages.

Marie Agier, Christine Froidevaux, Jean-Marc Petit, Yoan Renaud, Jef Wijsen

Proceedings of the 4th International Workshop on Logic in Databases, 2011

Uncertainty That Counts.

Dany Maslowski, Jef Wijsen

Proceedings of the Flexible Query Answering Systems - 9th International Conference, 2011

2010

A remark on the complexity of consistent conjunctive query answering under primary key violations.

Jef Wijsen

Inf. Process. Lett., 2010

On the first-order expressibility of computing certain answers to conjunctive queries over uncertain databases.

Jef Wijsen

Proceedings of the Twenty-Ninth ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, 2010

2009

Temporal Integrity Constraints.

Jef Wijsen

Proceedings of the Encyclopedia of Database Systems, 2009

Temporal Dependencies.

Jef Wijsen

Proceedings of the Encyclopedia of Database Systems, 2009

On the consistent rewriting of conjunctive queries under primary key constraints.

Jef Wijsen

Inf. Syst., 2009

On First-Order Query Rewriting for Incomplete Database Histories.

Véronique Bruyère, Alexandre Decan, Jef Wijsen

Proceedings of the TIME 2009, 2009

Consistent query answering under primary keys: a characterization of tractable queries.

Jef Wijsen

Proceedings of the Database Theory, 2009

2008

08421 Working Group: Imprecision, Diversity and Uncertainty: Disentangling Threads in Uncertainty Management.

Myra Spiliopoulou, Maurice van Keulen, Hans-Joachim Lenz, Jef Wijsen, Matthias Renz, Rudolf Kruse, Mirco Stern

Proceedings of the Uncertainty Management in Information Systems, 12.10. - 17.10.2008, 2008

2007

Consistent Joins Under Primary Key Constraints.

Jef Wijsen

Proceedings of the First International VLDB workshop on Management of Uncertain Data in conjunction with VLDB 2007, 2007

2006

Project-Join-Repair: An Approach to Consistent Query Answering Under Functional Dependencies.

Jef Wijsen

Proceedings of the Flexible Query Answering Systems, 7th International Conference, 2006

2005

Database repairing using updates.

Jef Wijsen

ACM Trans. Database Syst., 2005

On Condensing Database Repairs Obtained by Tuple Deletions.

Jef Wijsen

Proceedings of the 16th International Workshop on Database and Expert Systems Applications (DEXA 2005), 2005

2004

Making More Out of an Inconsistent Database.

Jef Wijsen

Proceedings of the Advances in Databases and Information Systems, 2004

2003

On query optimization in a temporal SPC algebra.

Jef Wijsen, Alexis Bès

Data Knowl. Eng., 2003

Condensed Representation of Database Repairs for Consistent Query Answering.

Jef Wijsen

Proceedings of the Database Theory, 2003

Logical Languages for Data Mining.

Fosca Giannotti, Giuseppe Manco, Jef Wijsen

Proceedings of the Logics for Emerging Applications of Databases [outcome of a Dagstuhl seminar], 2003

2002

Searching for dependencies at multiple abstraction levels.

Toon Calders, Raymond T. Ng, Jef Wijsen

ACM Trans. Database Syst., 2002

2001

Trends in Databases: Reasoning and Mining.

Jef Wijsen

IEEE Trans. Knowl. Data Eng., 2001

Temporal Tableau Queries.

Jef Wijsen, Alexis Bès

Proceedings of the Eigth International Symposium on Temporal Representation and Reasoning, 2001

Neighborhood Dependencies for Prediction.

Renaud Bassée, Jef Wijsen

Proceedings of the Knowledge Discovery and Data Mining, 2001

On Monotone Data Mining Languages.

Toon Calders, Jef Wijsen

Proceedings of the Database Programming Languages, 8th International Workshop, 2001

1999

Temporal FDs on Complex Objects.

Jef Wijsen

ACM Trans. Database Syst., 1999

Temporal Dependencies Generalized for Spatial and Other Dimensions.

Jef Wijsen, Raymond T. Ng

Proceedings of the Spatio-Temporal Database Management, 1999

Discovering Roll-Up Dependencies.

Jef Wijsen, Raymond T. Ng, Toon Calders

Proceedings of the Fifth ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 1999

1998

Reasoning about Qualitative Trends in Databases.

Jef Wijsen

Inf. Syst., 1998

On the Complexity of Mining Quantitative Association Rules.

Jef Wijsen, Robert Meersman

Data Min. Knowl. Discov., 1998

Nested Data Cubes for OLAP (Extended Abstract).

Stijn Dekeyser, Bart Kuijpers, Jan Paredaens, Jef Wijsen

Proceedings of the Advances in Database Technologies, 1998

1997

On the Complexity of Mining Temporal Trends.

Jef Wijsen, Robert Meersman

Proceedings of the Workshop on Research Issues on Data Mining and Knowledge Discovery, 1997

1995

Design of Temporal Relational Databases Based on Dynamic and Temporal Functional Dependencies

Jef Wijsen

Proceedings of the Recent Advances in Temporal Databases, 1995

1994

Temporal Dependencies in Relational Database Design.

Jef Wijsen, Jacques Vandenbulcke, Henke Olivie

Proceedings of the Dixièmes Journées Bases de Données Avancées, 30 Août, 1994

1993

Functional Dependencies Generalized for Temporal Databases that Include Object-Identity.

Jef Wijsen, Jacques Vandenbulcke, Henke Olivie

Proceedings of the Entity-Relationship Approach, 1993

A Theory of Keys for Temporal Databases.

Jef Wijsen

Proceedings of the Neuvièmes Journées Bases de Données Avancées, 1993