Jef Wijsen

Publication Activity (10 Years)

Years Active: 1993-2024
Publications (10 Years): 33

Top Topics

Data Complexity

Query Answering

Functional Dependencies

Top Venues

J. Comput. Syst. Sci.

Publications

Paraschos Koutris, Xiating Ouyang, Jef Wijsen
Consistent Query Answering for Primary Keys on Rooted Tree Queries. Proc. ACM Manag. Data 2 (2) (2024)
Aziz Amezian El Khalfioui, Jef Wijsen
Consistent Query Answering for Primary Keys and Conjunctive Queries with Counting. ICDT (2023)
Paraschos Koutris, Xiating Ouyang, Jef Wijsen
Consistent Query Answering for Primary Keys on Path Queries. CoRR (2023)
Zhiwei Fan, Paraschos Koutris, Xiating Ouyang, Jef Wijsen
LinCQA: Faster Consistent Query Answering with Linear Time Guarantees. Proc. ACM Manag. Data 1 (1) (2023)
Paraschos Koutris, Xiating Ouyang, Jef Wijsen
Consistent Query Answering for Primary Keys on Rooted Tree Queries. CoRR (2023)
Chloé Capon, Nicolas Lecomte, Jef Wijsen
Computing H-Partitions in ASP and Datalog. CoRR (2022)
Miika Hannula, Jef Wijsen
A Dichotomy in Consistent Query Answering for Primary Keys and Unary Foreign Keys. CoRR (2022)
Miika Hannula, Jef Wijsen
A Dichotomy in Consistent Query Answering for Primary Keys and Unary Foreign Keys. PODS (2022)
Zhiwei Fan, Paraschos Koutris, Xiating Ouyang, Jef Wijsen
LinCQA: Faster Consistent Query Answering with Linear Time Guarantees. CoRR (2022)
Aziz Amezian El Khalfioui, Jef Wijsen
Consistent Query Answering for Primary Keys and Conjunctive Queries with Counting. CoRR (2022)
Chloé Capon, Nicolas Lecomte, Jef Wijsen
Computing H-Partitions in ASP and Datalog. ICLP Workshops (2022)
Ester Livshits, Benny Kimelfeld, Jef Wijsen
Counting subset repairs with functional dependencies. J. Comput. Syst. Sci. 117 (2021)
Horacio Tellez Perez, Jef Wijsen
Generalized Weighted Repairs. FQAS (2021)
Paraschos Koutris, Jef Wijsen
Consistent Query Answering for Primary Keys in Datalog. Theory Comput. Syst. 65 (1) (2021)
Paraschos Koutris, Xiating Ouyang, Jef Wijsen
Consistent Query Answering for Primary Keys on Path Queries. PODS (2021)
Paraschos Koutris, Jef Wijsen
First-Order Rewritability in Consistent Query Answering with Respect to Multiple Keys. PODS (2020)
Horacio Tellez Perez, Jef Wijsen
Logic-Based Ranking of Assertions in Inconsistent ABoxes. Description Logics (2020)
Aziz Amezian El Khalfioui, Jonathan Joertz, Dorian Labeeuw, Gaëtan Staquet, Jef Wijsen
Optimization of Answer Set Programs for Consistent Query Answering by Means of First-Order Rewriting. CIKM (2020)
Jef Wijsen
Foundations of Query Answering on Inconsistent Databases. SIGMOD Rec. 48 (3) (2019)
Horacio Tellez Perez, Jef Wijsen
Connecting Databases and Ontologies: A Data Quality Perspective. Description Logics (2019)
Marc Gyssens, Jelle Hellings, Jan Paredaens, Dirk Van Gucht, Jef Wijsen, Yuqing Wu
Calculi for symmetric queries. J. Comput. Syst. Sci. 105 (2019)
Jef Wijsen
Corrigendum to "Counting Database Repairs that Satisfy Conjunctive Queries with Self-Joins". CoRR (2019)
Sven Schewe, Thomas Schneider, Jef Wijsen
Special issue on Temporal Representation and Reasoning (TIME 2017). Theor. Comput. Sci. 797 (2019)
Paraschos Koutris, Jef Wijsen
Consistent Query Answering for Primary Keys in Logspace. ICDT (2019)
Paraschos Koutris, Jef Wijsen
Consistent Query Answering for Primary Keys and Conjunctive Queries with Negated Atoms. PODS (2018)
Paraschos Koutris, Jef Wijsen
Consistent Query Answering for Primary Keys in Logspace. CoRR (2018)
Paraschos Koutris, Jef Wijsen
Consistent Query Answering for Self-Join-Free Conjunctive Queries Under Primary Key Constraints. ACM Trans. Database Syst. 42 (2) (2017)
Floris Geerts, Fabian Pijcke, Jef Wijsen
First-order under-approximations of consistent query answers. Int. J. Approx. Reason. 83 (2017)
Paraschos Koutris, Jef Wijsen
Consistent Query Answering for Primary Keys. SIGMOD Rec. 45 (1) (2016)
Jan Chomicki, Jef Wijsen
Consistent Query Answering for Atemporal Constraints over Temporal Databases. TIME (2016)
Paraschos Koutris, Jef Wijsen
A Trichotomy in the Data Complexity of Certain Query Answering for Conjunctive Queries. CoRR (2015)
Floris Geerts, Fabian Pijcke, Jef Wijsen
First-Order Under-Approximations of Consistent Query Answers. SUM (2015)
Paraschos Koutris, Jef Wijsen
The Data Complexity of Consistent Query Answering for Self-Join-Free Conjunctive Queries Under Primary Key Constraints. PODS (2015)
Dany Maslowski, Jef Wijsen
Counting Database Repairs that Satisfy Conjunctive Queries with Self-Joins. ICDT (2014)
Sergio Greco, Fabian Pijcke, Jef Wijsen
Certain Query Answering in Partially Consistent Databases. Proc. VLDB Endow. 7 (5) (2014)
Jef Wijsen
A Survey of the Data Complexity of Consistent Query Answering under Key Constraints. FoIKS (2014)
Jef Wijsen
Charting the tractability frontier of certain conjunctive query answering. PODS (2013)
Marc Gyssens, Jan Paredaens, Dirk Van Gucht, Jef Wijsen, Yuqing Wu
An Approach towards the Study of Symmetric Queries. Proc. VLDB Endow. 7 (1) (2013)
Jef Wijsen
Charting the Tractability Frontier of Certain Conjunctive Query Answering CoRR (2013)
Dany Maslowski, Jef Wijsen
A dichotomy in the complexity of counting database repairs. J. Comput. Syst. Sci. 79 (6) (2013)
Jef Wijsen
Certain conjunctive query answering in first-order logic. ACM Trans. Database Syst. 37 (2) (2012)
Véronique Bruyère, Olivier Carton, Alexandre Decan, Olivier Gauwin, Jef Wijsen
An aperiodicity problem for multiwords. RAIRO Theor. Informatics Appl. 46 (1) (2012)
Wenfei Fan, Floris Geerts, Jef Wijsen
Determining the Currency of Data. ACM Trans. Database Syst. 37 (4) (2012)
Alexandre Decan, Fabian Pijcke, Jef Wijsen
Certain Conjunctive Query Answering in SQL. SUM (2012)
Dany Maslowski, Jef Wijsen
Uncertainty That Counts. FQAS (2011)
Dany Maslowski, Jef Wijsen
On counting database repairs. LID (2011)
Wenfei Fan, Floris Geerts, Jef Wijsen
Determining the currency of data. PODS (2011)
Marie Agier, Christine Froidevaux, Jean-Marc Petit, Yoan Renaud, Jef Wijsen
On Armstrong-compliant logical query languages. LID (2011)
Jef Wijsen
Towards a Foundation of Data Currency. TIME (2011)
Jef Wijsen
A remark on the complexity of consistent conjunctive query answering under primary key violations. Inf. Process. Lett. 110 (21) (2010)
Jef Wijsen
On the first-order expressibility of computing certain answers to conjunctive queries over uncertain databases. PODS (2010)
Jef Wijsen
On the consistent rewriting of conjunctive queries under primary key constraints. Inf. Syst. 34 (7) (2009)
Véronique Bruyère, Alexandre Decan, Jef Wijsen
On First-Order Query Rewriting for Incomplete Database Histories. TIME (2009)
Jef Wijsen
Consistent query answering under primary keys: a characterization of tractable queries. ICDT (2009)
Myra Spiliopoulou, Maurice van Keulen, Hans-Joachim Lenz, Jef Wijsen, Matthias Renz, Rudolf Kruse, Mirco Stern
08421 Working Group: Imprecision, Diversity and Uncertainty: Disentangling Threads in Uncertainty Management. Uncertainty Management in Information Systems (2008)
Jef Wijsen
Consistent Joins Under Primary Key Constraints. MUD (2007)
Jef Wijsen
On the Consistent Rewriting of Conjunctive Queries Under Primary Key Constraints. DBPL (2007)
Jef Wijsen
Project-Join-Repair: An Approach to Consistent Query Answering Under Functional Dependencies. BDA (2006)
Jef Wijsen
Project-Join-Repair: An Approach to Consistent Query Answering Under Functional Dependencies. FQAS (2006)
Jef Wijsen
On Condensing Database Repairs Obtained by Tuple Deletions. DEXA Workshops (2005)
Jef Wijsen
Database repairing using updates. ACM Trans. Database Syst. 30 (3) (2005)
Jef Wijsen
Making More Out of an Inconsistent Database. ADBIS (2004)
Fosca Giannotti, Giuseppe Manco, Jef Wijsen
Logical Languages for Data Mining. Logics for Emerging Applications of Databases (2003)
Jef Wijsen
Condensed Representation of Database Repairs for Consistent Query Answering. ICDT (2003)
Jef Wijsen, Alexis Bès
On query optimization in a temporal SPC algebra. Data Knowl. Eng. 44 (2) (2003)
Toon Calders, Raymond T. Ng, Jef Wijsen
Searching for dependencies at multiple abstraction levels. ACM Trans. Database Syst. 27 (3) (2002)
Jef Wijsen, Alexis Bès
Temporal Tableau Queries. TIME (2001)
Jef Wijsen
Trends in Databases: Reasoning and Mining. IEEE Trans. Knowl. Data Eng. 13 (3) (2001)
Renaud Bassée, Jef Wijsen
Neighborhood Dependencies for Prediction. PAKDD (2001)
Toon Calders, Jef Wijsen
On Monotone Data Mining Languages. DBPL (2001)
Jef Wijsen
Temporal FDs on Complex Objects. ACM Trans. Database Syst. 24 (1) (1999)
Jef Wijsen, Raymond T. Ng, Toon Calders
Discovering Roll-Up Dependencies. KDD (1999)
Jef Wijsen, Raymond T. Ng
Temporal Dependencies Generalized for Spatial and Other Dimensions. Spatio-Temporal Database Management (1999)
Jef Wijsen
Reasoning about Qualitative Trends in Databases. Inf. Syst. 23 (7) (1998)
Jef Wijsen, Robert Meersman
On the Complexity of Mining Quantitative Association Rules. Data Min. Knowl. Discov. 2 (3) (1998)
Stijn Dekeyser, Bart Kuijpers, Jan Paredaens, Jef Wijsen
Nested Data Cubes for OLAP (Extended Abstract). ER Workshops (1998)
Jef Wijsen, Robert Meersman
On the Complexity of Mining Temporal Trends. DMKD (1997)
Jef Wijsen
Design of Temporal Relational Databases Based on Dynamic and Temporal Functional Dependencies Temporal Databases (1995)
Jef Wijsen, Jacques Vandenbulcke, Henke Olivie
Temporal Dependencies in Relational Database Design. BDA (1994)
Jef Wijsen
A Theory of Keys for Temporal Databases. BDA (1993)
Jef Wijsen, Jacques Vandenbulcke, Henke Olivie
Functional Dependencies Generalized for Temporal Databases that Include Object-Identity. ER (1993)