Tim Fischer

Research Assistant
Universität Tübingen, WSI
Lehrstuhl für Datenbanksysteme
Sand 13
72076 Tübingen
Room B314
+49 7071 29-70503
+49 7071 29-5958
tim.fischer@uni-tuebingen.de
0000-0002-6625-9627
Teaching Assistance
Summer 2025: | Functional Programming |
Summer 2025: | Team Project: The Construction of an SASL-Compiler |
Winter 2024/25: | Informatik 1 |
Winter 2024/25: | SQL is a Programming Language |
Summer 2024: | DB2 |
Summer 2024: | Selected Fun Problems of the ACM Programming Contest (proseminar) |
Summer 2024: | Team Project: The Construction of an SASL-Compiler |
Winter 2023/24: | What Makes the Duck Quack? |
Summer 2023: | DB1 |
Summer 2023: | Selected Fun Problems of the ACM Programming Contest (Proseminar) |
Winter 2022/23: | Info 1 (Praktische Informatik 1: Deklarative Programmierung) |
Summer 2022: | Teamprojekt: The Construction of an SASL-Compiler |
Winter 2021/22: | Selected Fun Problems of the ACM Programming Contest (Proseminar) |
Summer 2021: | Teamprojekt: The Construction of an SASL-Compiler |
Summer 2020: | Teamprojekt: The Construction of an SASL-Compiler |
Research Supervisor
2025: | Florian Martel | Bachelor Thesis | Overcoming Technical Debt: A Rebuild the Departments Course Overview Page |
2025: | Xenia Wetzel | Student Research Project | PL/pgSQL Frontend for Flummi |
2024: | Ludwig Kolesch | Bachelor Thesis | Bringing Flummi to WITH MUTUALLY RECURSIVE on Materialize DB |
2024: | Markus Holder | Bachelor Thesis | Bringing Flummi to umbra.trampoline |
2024: | Nico Faden | Bachelor Thesis | Bringing ORDINALITY to DuckDB |
2024: | Felix Kofink | Master Thesis | Database-Backed Computation Over Weather Data |
2024: | Fredo Hogen | Bachelor Thesis | How expressive is Flummi really? Can it run Advent of Code? |
2024: | Xenia Wetzel | Bachelor Thesis | Writing an Interpreter for a Database-Coupled Language |
2023: | Zora Pidde | Bachelor Thesis | Extending ByePy with geometric types and operators |
2022: | Phil Elgert | Master Thesis | Creating a Website with a Static Site Generator |
Short Biography
- since April 2021: Research Assistant at the Database Systems Chair
- Aug 2017 - Mar 2021: Full-Stack Webdeveloper at mecodia GmbH
- Oct 2016 - Sep 2023: Student of Computer Science at University of Tübingen
Recent Publications
A Reproducible Tutorial on Reproducibility in Database Systems Research
Tim Fischer • Denis Hirn • Gökhan Kul
VLDB 2024, 50th International Conference on Very Large Data Bases (VLDB 2024), August 26, 2024, Guangzhou, China
SQL Engines Excel at the Execution of Imperative Programs
Tim Fischer • Denis Hirn • Torsten Grust
PVLDB, Volume 17, No. 13: 4696 - 4708, 2024. doi:10.14778/3704965.3704976
BibTeX Citation
@article{10.14778/3704965.3704976,
author = {Fischer, Tim and Hirn, Denis and Grust, Torsten},
title = {SQL Engines Excel at the Execution of Imperative Programs},
year = {2025},
issue_date = {September 2024},
publisher = {VLDB Endowment},
volume = {17},
number = {13},
issn = {2150-8097},
url = {https://doi.org/10.14778/3704965.3704976},
doi = {10.14778/3704965.3704976},
journal = {Proc. VLDB Endow.},
month = feb,
pages = {4696–4708},
numpages = {13}
}
To Iterate Is Human, to Recurse Is Divine—Mapping Iterative Python to Recursive SQL
Datenbanksysteme für Business, Technologie und Web (BTW 2023), Student Program, Dresden, Germany, March 2023. Best Student Contribution doi:10.18420/BTW2023-73
BibTeX Citation
@incollection{10.18420/BTW2023-73,
author = {Fischer, Tim},
title = {To Iterate Is Human, to Recurse Is Divine --- Mapping Iterative Python to Recursive SQL},
year = {2023},
doi = {10.18420/BTW2023-73},
booktitle = {BTW 2023},
publisher = {Gesellschaft für Informatik e.V.},
address = {Bonn},
isbn = {978-3-88579-725-8},
pages = {1069--1074}
}
Snakes on a Plan — Compiling Python Functions into Plain SQL Queries
Denis Hirn • Torsten Grust • Tim Fischer
Proceedings of the 41st ACM SIGMOD Int’l Conference on Management of Data (SIGMOD 2022), Philadelphia, PA, USA, June 2022. doi:10.1145/3514221.3520175
BibTeX Citation
@inproceedings{snakes-on-a-plan,
author = {Fischer, Tim and Hirn, Denis and Grust, Torsten},
title = {Snakes on a Plan: Compiling Python Functions into Plain SQL Queries},
year = {2022},
isbn = {9781450392495},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
url = {https://doi.org/10.1145/3514221.3520175},
doi = {10.1145/3514221.3520175},
booktitle = {Proceedings of the 2022 International Conference on Management of Data},
pages = {2389–2392},
numpages = {4},
keywords = {SQL, compilation, python, recursion, user-defined functions},
location = {Philadelphia, PA, USA},
series = {SIGMOD '22}
}