Valda Seminar: Paul Boniol

28 November 2022, 14:00-15:00. ENS, S16. Detection of Anomalies and Identification of their Precursors in Large Data Series Collections Extensive collections of data series are becoming a reality in many scientific and social domains, such as environmental sciences, astrophysics, neurosciences, and engineering. Informally, a data series is an ordered sequence…

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Valda Seminar: Dan Suciu

4 November 2022, 10:30-11:30. ENS, S16. Datalog: Optimizations and Extensions Modern data analytics requires iteration, yet relational database engines are mostly optimized for non-recursive queries. SQL supports only a limited form of recursion. A better formalism for recursive queries is datalog, which has some elegant properties (recursion always terminates), and…

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Valda Seminar: Camille Bourgaux

3 June 2022, 10:30-11:30. ENS, Hauts du DI. Querying inconsistent prioritized data with ORBITS: Algorithms, implementation, and experiments We investigate practical algorithms for inconsistency-tolerant query answering over prioritized knowledge bases, which consist of a logical theory, a set of facts, and a priority relation between conflicting facts. We consider three…

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Valda Seminar: Anantha Padmanabha

20 May 2022, 10:30-11:30. ENS S16. Algorithm for consistent query answering under primary key constraints Databases often have constraints. One of the basic constraints is the “primary key constraint” which states there can be at most one tuple for every primary key. However, these days it is common to have…

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