@Proceedings{yi_et_al:LIPIcs.ICDT.2021, title = {{LIPIcs, Volume 186, ICDT 2021, Complete Volume}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {1--438}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021}, URN = {urn:nbn:de:0030-drops-137076}, doi = {10.4230/LIPIcs.ICDT.2021}, annote = {Keywords: LIPIcs, Volume 186, ICDT 2021, Complete Volume} } @InProceedings{yi_et_al:LIPIcs.ICDT.2021.0, author = {Yi, Ke and Wei, Zhewei}, title = {{Front Matter, Table of Contents, Preface, Conference Organization}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {0:i--0:xvi}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.0}, URN = {urn:nbn:de:0030-drops-137086}, doi = {10.4230/LIPIcs.ICDT.2021.0}, annote = {Keywords: Front Matter, Table of Contents, Preface, Conference Organization} } @InProceedings{barcelo:LIPIcs.ICDT.2021.1, author = {Barcel\'{o}, Pablo}, title = {{Explainability Queries for ML Models and its Connections with Data Management Problems}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {1:1--1:1}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.1}, URN = {urn:nbn:de:0030-drops-137091}, doi = {10.4230/LIPIcs.ICDT.2021.1}, annote = {Keywords: ML models, Explainability, Shapley values, decision trees, OBDDs, deterministic and decomposable Boolean circuits} } @InProceedings{stoyanovich:LIPIcs.ICDT.2021.2, author = {Stoyanovich, Julia}, title = {{Comparing Apples and Oranges: Fairness and Diversity in Ranking}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {2:1--2:1}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.2}, URN = {urn:nbn:de:0030-drops-137104}, doi = {10.4230/LIPIcs.ICDT.2021.2}, annote = {Keywords: fairness, diversity, ranking, set selection, responsible data management} } @InProceedings{alway_et_al:LIPIcs.ICDT.2021.3, author = {Alway, Kaleb and Blais, Eric and Salihoglu, Semih}, title = {{Box Covers and Domain Orderings for Beyond Worst-Case Join Processing}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {3:1--3:23}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.3}, URN = {urn:nbn:de:0030-drops-137114}, doi = {10.4230/LIPIcs.ICDT.2021.3}, annote = {Keywords: Beyond worst-case join algorithms, Tetris, Box covers, Domain orderings} } @InProceedings{schmid_et_al:LIPIcs.ICDT.2021.4, author = {Schmid, Markus L. and Schweikardt, Nicole}, title = {{A Purely Regular Approach to Non-Regular Core Spanners}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {4:1--4:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.4}, URN = {urn:nbn:de:0030-drops-137124}, doi = {10.4230/LIPIcs.ICDT.2021.4}, annote = {Keywords: Document spanners, regular expressions with backreferences} } @InProceedings{deep_et_al:LIPIcs.ICDT.2021.5, author = {Deep, Shaleen and Koutris, Paraschos}, title = {{Ranked Enumeration of Conjunctive Query Results}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {5:1--5:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.5}, URN = {urn:nbn:de:0030-drops-137139}, doi = {10.4230/LIPIcs.ICDT.2021.5}, annote = {Keywords: Query result enumeration, joins, ranking} } @InProceedings{lu_et_al:LIPIcs.ICDT.2021.6, author = {Lu, Shangqi and Tao, Yufei}, title = {{Towards Optimal Dynamic Indexes for Approximate (and Exact) Triangle Counting}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {6:1--6:23}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.6}, URN = {urn:nbn:de:0030-drops-137146}, doi = {10.4230/LIPIcs.ICDT.2021.6}, annote = {Keywords: Triangle Counting, Data Structures, Lower Bounds, Graph Algorithms} } @InProceedings{peterfreund:LIPIcs.ICDT.2021.7, author = {Peterfreund, Liat}, title = {{Grammars for Document Spanners}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {7:1--7:18}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.7}, URN = {urn:nbn:de:0030-drops-137154}, doi = {10.4230/LIPIcs.ICDT.2021.7}, annote = {Keywords: Information Extraction, Document Spanners, Context-Free Grammars, Constant-Delay Enumeration, Regular Expressions, Pushdown Automata} } @InProceedings{aamer_et_al:LIPIcs.ICDT.2021.8, author = {Aamer, Heba and Van den Bussche, Jan}, title = {{Input-Output Disjointness for Forward Expressions in the Logic of Information Flows}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {8:1--8:18}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.8}, URN = {urn:nbn:de:0030-drops-137167}, doi = {10.4230/LIPIcs.ICDT.2021.8}, annote = {Keywords: Composition, expressive power, variable substitution} } @InProceedings{tencate_et_al:LIPIcs.ICDT.2021.9, author = {ten Cate, Balder and Dalmau, Victor}, title = {{Conjunctive Queries: Unique Characterizations and Exact Learnability}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {9:1--9:24}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.9}, URN = {urn:nbn:de:0030-drops-137172}, doi = {10.4230/LIPIcs.ICDT.2021.9}, annote = {Keywords: Conjunctive Queries, Homomorphisms, Frontiers, Unique Characterizations, Exact Learnability, Schema Mappings, Description Logic} } @InProceedings{doleschal_et_al:LIPIcs.ICDT.2021.10, author = {Doleschal, Johannes and Bratman, Noa and Kimelfeld, Benny and Martens, Wim}, title = {{The Complexity of Aggregates over Extractions by Regular Expressions}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {10:1--10:20}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.10}, URN = {urn:nbn:de:0030-drops-137181}, doi = {10.4230/LIPIcs.ICDT.2021.10}, annote = {Keywords: Information extraction, document spanners, regular expressions, aggregation functions} } @InProceedings{feier_et_al:LIPIcs.ICDT.2021.11, author = {Feier, Cristina and Lutz, Carsten and Przyby{\l}ko, Marcin}, title = {{Answer Counting Under Guarded TGDs}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {11:1--11:22}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.11}, URN = {urn:nbn:de:0030-drops-137195}, doi = {10.4230/LIPIcs.ICDT.2021.11}, annote = {Keywords: Ontology-Mediated Querying, Querying under Constraints, Answer Counting, Parameterized Complexity} } @InProceedings{mcgregor_et_al:LIPIcs.ICDT.2021.12, author = {McGregor, Andrew and Tench, David and Vu, Hoa T.}, title = {{Maximum Coverage in the Data Stream Model: Parameterized and Generalized}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {12:1--12:20}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.12}, URN = {urn:nbn:de:0030-drops-137208}, doi = {10.4230/LIPIcs.ICDT.2021.12}, annote = {Keywords: Data streams, maximum coverage, maximum unique coverage, set cover} } @InProceedings{moumoulidou_et_al:LIPIcs.ICDT.2021.13, author = {Moumoulidou, Zafeiria and McGregor, Andrew and Meliou, Alexandra}, title = {{Diverse Data Selection under Fairness Constraints}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {13:1--13:25}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.13}, URN = {urn:nbn:de:0030-drops-137216}, doi = {10.4230/LIPIcs.ICDT.2021.13}, annote = {Keywords: data selection, diversity maximization, fairness constraints, approximation algorithms} } @InProceedings{deep_et_al:LIPIcs.ICDT.2021.14, author = {Deep, Shaleen and Hu, Xiao and Koutris, Paraschos}, title = {{Enumeration Algorithms for Conjunctive Queries with Projection}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {14:1--14:17}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.14}, URN = {urn:nbn:de:0030-drops-137229}, doi = {10.4230/LIPIcs.ICDT.2021.14}, annote = {Keywords: Query result enumeration, joins, ranking} } @InProceedings{livshits_et_al:LIPIcs.ICDT.2021.15, author = {Livshits, Ester and Kimelfeld, Benny}, title = {{The Shapley Value of Inconsistency Measures for Functional Dependencies}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {15:1--15:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.15}, URN = {urn:nbn:de:0030-drops-137230}, doi = {10.4230/LIPIcs.ICDT.2021.15}, annote = {Keywords: Shapley value, inconsistent databases, functional dependencies, database repairs} } @InProceedings{carmeli_et_al:LIPIcs.ICDT.2021.16, author = {Carmeli, Nofar and Grohe, Martin and Kimelfeld, Benny and Livshits, Ester and Tibi, Muhammad}, title = {{Database Repairing with Soft Functional Dependencies}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {16:1--16:17}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.16}, URN = {urn:nbn:de:0030-drops-137245}, doi = {10.4230/LIPIcs.ICDT.2021.16}, annote = {Keywords: Database inconsistency, database repairs, integrity constraints, soft constraints, functional dependencies} } @InProceedings{amarilli_et_al:LIPIcs.ICDT.2021.17, author = {Amarilli, Antoine and Kimelfeld, Benny}, title = {{Uniform Reliability of Self-Join-Free Conjunctive Queries}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {17:1--17:17}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.17}, URN = {urn:nbn:de:0030-drops-137252}, doi = {10.4230/LIPIcs.ICDT.2021.17}, annote = {Keywords: Hierarchical conjunctive queries, query reliability, tuple-independent database, counting problems, #P-hardness} } @InProceedings{pagh_et_al:LIPIcs.ICDT.2021.18, author = {Pagh, Rasmus and Stausholm, Nina Mesing}, title = {{Efficient Differentially Private F₀ Linear Sketching}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {18:1--18:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.18}, URN = {urn:nbn:de:0030-drops-137264}, doi = {10.4230/LIPIcs.ICDT.2021.18}, annote = {Keywords: Differential Privacy, Linear Sketches, Weighted F0 Estimation} } @InProceedings{casel_et_al:LIPIcs.ICDT.2021.19, author = {Casel, Katrin and Schmid, Markus L.}, title = {{Fine-Grained Complexity of Regular Path Queries}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {19:1--19:20}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.19}, URN = {urn:nbn:de:0030-drops-137277}, doi = {10.4230/LIPIcs.ICDT.2021.19}, annote = {Keywords: Graph Databases, Regular Path Queries, Enumeration, Fine-Grained Complexity} } @InProceedings{bourhis_et_al:LIPIcs.ICDT.2021.20, author = {Bourhis, Pierre and Grez, Alejandro and Jachiet, Louis and Riveros, Cristian}, title = {{Ranked Enumeration of MSO Logic on Words}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {20:1--20:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.20}, URN = {urn:nbn:de:0030-drops-137286}, doi = {10.4230/LIPIcs.ICDT.2021.20}, annote = {Keywords: Persistent data structures, Query evaluation, Enumeration algorithms} } @InProceedings{mccauley:LIPIcs.ICDT.2021.21, author = {McCauley, Samuel}, title = {{Approximate Similarity Search Under Edit Distance Using Locality-Sensitive Hashing}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {21:1--21:22}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.21}, URN = {urn:nbn:de:0030-drops-137299}, doi = {10.4230/LIPIcs.ICDT.2021.21}, annote = {Keywords: edit distance, approximate pattern matching, approximate nearest neighbor, similarity search, locality-sensitive hashing} } @InProceedings{sundarmurthy_et_al:LIPIcs.ICDT.2021.22, author = {Sundarmurthy, Bruhathi and Koutris, Paraschos and Naughton, Jeffrey}, title = {{Locality-Aware Distribution Schemes}}, booktitle = {24th International Conference on Database Theory (ICDT 2021)}, pages = {22:1--22:25}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-179-5}, ISSN = {1868-8969}, year = {2021}, volume = {186}, editor = {Yi, Ke and Wei, Zhewei}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2021.22}, URN = {urn:nbn:de:0030-drops-137302}, doi = {10.4230/LIPIcs.ICDT.2021.22}, annote = {Keywords: partitioning, parallel correctness, join queries} }