The Dutch Seminar
on Data Systems Design

An initiative to bring together research groups working on data systems in Dutch universities and research institutes.

Fridays4–5:30 pm

We hold bi-weekly talks on Fridays from 4:00 PM to 5:30 PM CET for and by researchers and practitioners designing (and implementing) data systems. The objective is to establish a new forum for the Dutch Data Systems community to come together, foster collaborations between its members, and bring in high quality international speakers. We would like to invite all researchers, especially also PhD students, who are working on related topics to join the events. It is an excellent opportunity to receive feedback early on by researchers in your field.

Past talks

Nov 26, 2021

Building Advanced SQL Analytics From Low-Level Plan Operators

Thomas Neumann (Technical University of Munich)

Analytical queries virtually always involve aggregation and statistics. SQL offers a wide range of functionalities to summarize data such as associative aggregates, distinct aggregates, ordered-set aggregates, grouping sets, and window functions. In this work, we propose a unified framework for advanced statistics that composes all flavors of complex SQL aggregates from low-level plan operators.

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Nov 12, 2021

Fastest table sort in the West - Redesigning DuckDB’s sort

Laurens Kuiper (CWI)

Sorting is one of the most well studied problems in Computer Science. Research in this area forms the basis of sorting in database systems but focuses mostly on sorting large arrays. Sorting is more complex for relational data as many different types need to be supported, as well as NULL values. There can also be multiple order clauses.

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