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cs.DB2026
The Complexity of Finding Missing Answer Repairs
Jesse Comer, Val Tannen
We investigate the problem of identifying database repairs for missing tuples in query answers. We show that when the query is part of the input - the combined complexity setting -…
cs.DB2025
A Unifying Algorithm for Hierarchical Queries
Mahmoud Abo Khamis, Jesse Comer, Phokion Kolaitis +2
The class of hierarchical queries is known to define the boundary of the dichotomy between tractability and intractability for the following two extensively studied problems about…
cs.DB2024
Evaluating Datalog over Semirings: A Grounding-based Approach
Hangdong Zhao, Shaleen Deep, Paraschos Koutris +2
Datalog is a powerful yet elegant language that allows expressing recursive computation. Although Datalog evaluation has been extensively studied in the literature, so far, only lo…