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Torsten „Teggy“ Grust

@teggy.org
677 followers 181 following 49 posts

Professor — like database systems, programming languages, and SC Freiburg ツ

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Torsten „Teggy“ Grust @teggy.org · 14/09/2026
Listened to the latest episode of the Type Theory for All podcast (www.typetheoryforall.com/episodes/pl-...) which was absolutely great. Now have the following pinned on my office wall, lest I forget. Thanks, @shriram.bsky.social.
"And our goal in life needs to be to be able to beat the averaging machine. To be able to have a thought that the averaging machine could not produce, [...]

If all we're doing is what the averaging machine does, then we might as well be replaced by the averaging machine.

Right?"
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BOB Konferenz @bobkonf.de · 03/09/2026
The #BOBkonf2027 Call for Contributions is live! We're accepting submissions until 2 November 2026. More information regarding the call can be found here: bobkonf.de/2027/cfc.html
bobkonf.de
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DuckDB @duckdb.org · 01/09/2026
[v2.0 preview:] #DuckDB’s recursive CTE engine now treats recursion as 1 long-lived computation: it retains eligible epoch-invariant state, chooses execution modes from exact frontier cardinalities and physical work, probes keyed state directly and gives `USING KEY ... UNION` changed-key semantics.
duckdb.org
How DuckDB Runs Recursive CTEs Faster
DuckDB's recursive CTE engine now treats recursion as one long-lived computation: it retains eligible epoch-invariant state, chooses execution modes from exact frontier cardinalities and physical work...
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Torsten „Teggy“ Grust @teggy.org · 21/08/2026
Auf geht’s, Ansa und VFL! ⚽️ 🤪 #dfbpokal #vfb #hansa #megapark #mallorca
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DuckDB @duckdb.org · 17/08/2026
Quack, quack! A DuckDB v2.0 preview is here! 🦆 In this post, #DuckDB co-creators Mark Raasveldt + @hannes.muehleisen.org preview the headline features of DuckDB v2.0 (expected to land this autumn): • DuckDB as a server • Triggers • async I/O • + more Dive into the deets: duckdb.org/2026/08/17/d...
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DuckDB @duckdb.org · 07/08/2026
We’re excited to announce the #DuckDB Boston meetup, which will take place during the week of the VLDB conference. Come join the DuckDB community in Beantown for technical talks, drinks, and networking with new faces and old friends. We hope to see you there! 🦆 (Registration is required but free)
duckdb.org
DuckDB Boston Meetup
DuckDB is an in-process SQL database management system focused on analytical query processing. It is designed to be easy to install and easy to use. DuckDB has no external dependencies. DuckDB has bin...
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DuckDB @duckdb.org · 23/07/2026
🦆 Announcing DuckDB 1.5.5 ! 🦆 This release includes a number of bugfixes, performance improvements, and security patches. Summary blog: duckdb.org/2026/07/22/a... Full release notes: github.com/duckdb/duckd... Thank you to all the contributors for providing detailed issue reports and patches. 💖
duckdb.org
Announcing DuckDB 1.5.5
Today we are releasing DuckDB 1.5.5 with bugfixes and performance improvements.
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DuckDB @duckdb.org · 09/07/2026
Check out the Awesome DuckDB repo – curated by @davidgasquez.com – to explore the growing list of handy tools and cool projects built around #DuckDB, DuckLake and more. 😎 🦆 Notice a great tool that’s missing? Submit a PR to get it added. Start exploring: davidgasquez.github.io/awesome-duck...
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Pınar Tözün @pinartozun.bsky.social · 02/07/2026
June 2026 issue of #SIGMODRecord is out. And so is the new issue of the Reminiscences column. Many thanks to @teggy.org (Torsten Grust), Wenjie Zhang, and Viktor Sanca for their contributions!! pdf --> sigmodrecord.org/publications...
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DuckDB @duckdb.org · 26/06/2026
🤩 DuckCon's talk slides and recordings are out!
duckdb.org
DuckCon #7 in Amsterdam
We're hosting DuckCon #7 in our home town of Amsterdam on Wednesday, June 24.
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DuckDB @duckdb.org · 17/06/2026
Today, we are releasing DuckDB v1.4.5 and v1.5.4. Yes, we know – these version numbers can be a bit confusing! That's why we wrote two blog posts this time. The thread helps you pick the right one 🧵
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Torsten „Teggy“ Grust @teggy.org · 29/05/2026
Start smoking already, idiot!
Sign that reads „Please No No Smoking“
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DuckDB @duckdb.org · 26/05/2026
DuckCon #7 is coming up and we're looking for sponsors. We have a lineup of 15 speakers, sharing their experiences with DuckDB. For the first time, the talks will also cover DuckLake and Quack. Check out the sponsorship packages on the conference site, duckcon.org
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DuckDB @duckdb.org · 20/05/2026
Today, we are releasing DuckDB v1.5.3. This is not an ordinary patch release – it packs many new features for the Quack client-server protocol, Quack support for DuckLake, and big updates for AWS, HTTPS and Iceberg. Check out our blog post about all these changes and improvements – link in the 🧵.
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Markus Winand @winand.at · 14/05/2026
ORDER BY Has Come a Long Way modern-sql.com/blog/2026-05... The ORDER BY clause is surely one of the best-known SQL clauses. Yet there are a number of common misunderstandings that are worth clearing up. For that, the article walks you through the evolution of the ORDER BY clause the SQL standard.
modern-sql.com
SQL’s ORDER BY Has Come a Long Way
ORDER BY Evolution
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DuckDB @duckdb.org · 14/05/2026
This Tuesday, Hannes announced Quack, our new protocol that turns DuckDB into a client-server database. Watch his talk, recorded at the AI Council, where he explained how Quack works in practice, what stack it's built on, how it performs, and what our long-term ambitions are. youtu.be/L_lttD-d1wc
youtube.com
DuckDB-Quack announcement at AI Council
YouTube video by DuckDB
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Torsten „Teggy“ Grust @teggy.org · 08/05/2026
Heiser. Aber total #scf
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SC Freiburg @scfreiburg.com · 07/05/2026
ISTANBUL, WIR KOMMEN! ❤️‍🔥
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Gabor Szarnyas @szarnyasg.org · 07/05/2026
I've been working on organizing our next DuckCon for the past three months. The program is finally out and I think we have a really strong lineup, featuring speakers from ETH Zürich, Spotify, MariaDB, the Merck Group, Snowflake, Foursquare, and more. Join us in Amsterdam on June 24!
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DuckDB @duckdb.org · 06/05/2026
The program for DuckCon #7 is out! Here's the gist: – State of the Duck: DuckLake v1.0 + a super-secret new feature – Six regular talks (incl. one from Spotify) – Six lightning talks (incl. Toyota Gazoo WRT) – Drinks & snacks and time to socialize 🧵 Full program and registration link in the thread
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Torsten „Teggy“ Grust @teggy.org · 27/04/2026
Flattered that the good FP folks put up with me as a DB guy. Thank you for the chat, @kosmikus.bsky.social and @sperbsen.bsky.social. What a fun hour to spend!
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DuckDB @duckdb.org · 17/04/2026
We are hosting the next edition of our community conference, DuckCon, in Amsterdam on June 24. The registration is already open and you can submit your talk proposals until next Wednesday. Looking forward to your submissions and seeing the flock in the summer!
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DuckDB @duckdb.org · 31/03/2026
🇳🇱 DuckCon returns to the Netherlands! We'll host our next edition on June 24 in Amsterdam. We are looking forward to meeting the DuckDB community in our home town's Royal Tropical Institute for an afternoon of talks and discussions. Please submit your talk proposals and register! duckcon.org
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Disseminate: The Computer Science Research Podcast @disseminatepodcast.bsky.social · 25/03/2026
🚨 "AnyBlox: A Framework for Self-Decoding Datasets" with Mat Gienieczko (@gienieczko.com) is available now! Watch on YouTube ➡️ youtu.be/2YwC_GVvxgA?... Listen on Spotify ➡️ open.spotify.com/episode/1YAf... Listen on Apple ➡️ podcasts.apple.com/us/podcast/m...
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Artisanal Sudoku @artisanalsudoku.bsky.social · 17/03/2026
The Artisanal Sudoku book is now available! www.hachettebookgroup.com/titles/james...
hachettebookgroup.com
Artisanal Sudoku
Eye-catchingly elegant, satisfyingly tricky logic puzzles! Sudoku is one of the most popular, ubiquitous puzzles around—but most of the sudoku out there ar...
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KaterFritz 🐔 🤔 🥚 @konkretbitte.eurosky.social · 14/03/2026
🤭 💐 π-day
Eine Cartoon-Zeichnung zeigt eine Straßenszene mit einem Zebrastreifen, auf dem Zahlen als Figuren mit Augen und Armen gehen. Links steht die Zahl 6 und sagt in einer Sprechblase „AFTER YOU…“ zu der vor ihr laufenden Zahl 3,1415, die den Beginn der Kreiszahl Pi darstellt und sich nach hinten umdreht. Die 3,1415 führt eine sehr lange Schlange weiterer Ziffern an, die sich wie eine endlose Reihe über den Zebrastreifen erstreckt. Unter der Szene steht der Text „A DECISION SHARON CAME TO REGRET“, was andeutet, dass Sharon (die 6) ihre Höflichkeit bereut, weil sie nun hinter der unendlich langen Zahl Pi warten muss.
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Torsten „Teggy“ Grust @teggy.org · 14/03/2026
Wie oft es wohl Patt, Punkteteilung oder Gleichstand gab? 🤔 @scfreiburg.com #nurderSCF
SC Freiburg Newsletter: In den vergangenen sechs Spielen gegen Union Berlin gab es drei Unentschieden und ebenso viele Remis.
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DuckDB @duckdb.org · 09/03/2026
We released DuckDB v1.5! This release comes with a “friendly CLI” client, a new (opt-in) PEG parser, support for VARIANT types and many lakehouse features. It also ships a new network stack, a reworked geospatial extension, Azure writes and an ODBC scanner. Read more at duckdb.org/2026/03/09/a...
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DuckDB @duckdb.org · 27/02/2026
🗓️ This year, we came up with new merchandise: the 2026 Friendly DuckDB calendar, which has a SQL feature for every month along with art inspired by the feature. ⬇️ If you were lucky to get one at our events, that's great! :) If not, you can still grab the PDF at blobs.duckdb.org/merch/duckdb...
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DuckDB @duckdb.org · 26/02/2026
🌏 We are happy to announce the first DuckCon in the APAC region: DuckCon #7 will take place in the National Gallery Singapore on 2026-05-05. 🗳️ Registration and the Call for Talks are open! Submit your proposals until 2026-03-18. ➡️ duckdb.org/events/2026/...
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DuckDB @duckdb.org · 23/02/2026
🏗️ The DuckDB team is working hard on delivering DuckDB v1.5. 🌃 While the official release is next week, you can already give it a quick test using the nightly builds available at duckdb.org/install/prev... If you encounter any issues, let us know! 🐛💬
duckdb.org
DuckDB Preview (Nightly) Installation
DuckDB preview installation page
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DuckDB @duckdb.org · 20/02/2026
🦆 ↔️ 🦀 DuckDB Labs is looking for a Rust engineer to join our team in Amsterdam. 📝 See the details and application page at duckdblabs.com/jobs/rust_en...
duckdblabs.com
Rust Engineer
DuckDB Labs provides services around the DuckDB in-process OLAP data management system directly from its main developers.
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Dyalog @dyalog.bsky.social · 13/02/2026
The ArrayCast is back and now it's broadcast live! Join Conor Hoekstra, Adám Brudzewsky, and guests. The next episode, "FIXAPL with Jacob Lockwood", will take place on Monday 16 February at 15:00 UTC – see www.youtube.com/@arraycast/ #APL #ArrayProgramming #ArrayCast
Array Cast Logo
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DuckDB @duckdb.org · 02/02/2026
🎞️ The slide decks and talk recordings of last Friday's developer meeting are out! duckdb.org/events/2026/...
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DuckDB @duckdb.org · 29/01/2026
📆 The DuckDB Developer Meeting in Amsterdam starts tomorrow! We'll have a deep-dive extension development workshop in the morning and four exciting talks in the afternoon. 🎟️ Last chance to register at duckdb.org/events/2026/...
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Shriram Krishnamurthi @shriram.bsky.social · 20/01/2026
Please help us publicize TEAL: Tools for Educational Activities in Logic, a workshop associated w/ FLoC26. We have a novel design, focused on demos, discussion, and generally high-quality interaction rather than weak papers. See full details on our site! teal.cs.brown.edu/floc2026/
teal.cs.brown.edu
TEAL 2026: Tools for Educational Activities in Logic
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DuckDB @duckdb.org · 16/01/2026
We are going to hold the first DuckDB Developer Meeting in two weeks in Amsterdam! On the day of the meeting, DuckDB Community Extensions development champion Rusty Conover will also give a workshop on DuckDB extension development. Check out the programme and sign up at duckdb.org/events/2026/...
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Andy Pavlo @andypavlo.bsky.social · 05/01/2026
I've posted my latest recap of the world of databases: www.cs.cmu.edu/~pavlo/blog/... All the hot topics from the last year: • More Postgres action! • MCP for everyone! • MongoDB gets litigious with FerretDB! • File formats! • Market movements! • The richest person in the history of the world!
cs.cmu.edu
Databases in 2025: A Year in Review
The world tried to kill Andy off but he had to stay alive to to talk about what happened with databases in 2025.
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Torsten „Teggy“ Grust @teggy.org · 04/01/2026
The second derivative of smile is indifference.
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DuckDB @duckdb.org · 19/12/2025
🏛️ We launched the DuckDB Library: a curated collection of papers, podcasts, talks and books about DuckDB. 📚 We already have a collection of almost one hundred entities. The thumbnails show whether a piece is from the DuckDB team (yellow) or from others (purple). ➡️ duckdb.org/library/
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Torsten „Teggy“ Grust @teggy.org · 11/12/2025
On the south stand again! #scf
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Markus Winand @winand.at · 28/11/2025
modern-sql.com now covers DuckDB.
modern-sql.com
Modern SQL: A lot has changed since SQL-92
SQL has evolved. Beyond the relational model. Discover it now.
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Torsten „Teggy“ Grust @teggy.org · 17/10/2025
SQL's recursive common table expressions (CTEs) have a questionable reputation: verbose, awkward to read, inefficient to evaluate, ungrokkable semantics, ripe with arbitrary syntactic restrictions, and basically stale for 25 years now (since their advent in SQL:1999). Ugh.
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Disseminate: The Computer Science Research Podcast @disseminatepodcast.bsky.social · 16/10/2025
Here's what we've got in store for you! 🎓 E1: Torsten Grust (@teggy.org) (University of Tübingen) - Recursive Common Table Expressions (CTEs) Demystified 🧨 E2: Abigail Kim (@abigalekim.bsky.social) (Carnegie Mellon University) - Anarchy in the Database (deep dive into DBMS Extensibility)
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CedarDB @cedardb.com · 09/09/2025
What if a database could be your game engine? During parental leave @lukasvogel.bsky.social built DOOMQL: A multiplayer DOOM-like where everything (rendering, game loop, state) runs in pure SQL on CedarDB. It's fast, ridiculous, and surprisingly elegant. Full write-up: cedardb.com/blog/doomql
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PVLDB @pvldb.bsky.social · 02/09/2025
Vol:18 No:12 → Democratize MATCH_RECOGNIZE! 👥 Authors: Louisa Lambrecht, Tim Findling, Samuel Heid, Marcel Knüdeler, Torsten Grust 📄 PDF: www.vldb.org/pvldb/vol18/p5251-lamb…
Thumbnail: Democratize MATCH_RECOGNIZE!
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Torsten „Teggy“ Grust @teggy.org · 31/08/2025
I don‘t know about you. But Whova is such a PITA.
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DuckDB @duckdb.org · 28/08/2025
🔬 We are hosting the first “DuckDB in Science” meetup in London on September 4, co-located with VLDB 2025. 🔍 We'll have two deep-dive presentations from DuckDB's developers and four lightning talks from community members. 📍 For details and registration, see duckdb.org/events/2025/...
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Torsten „Teggy“ Grust @teggy.org · 29/08/2025
www.linkedin.com/posts/duckdb...
linkedin.com
We are hosting the first “DuckDB in Science” meetup on September 4 in London, co-located with VLDB 2025. 🔍 We'll have two deep-dive presentations from DuckDB's developers: Laurens Kuiper will...
We are hosting the first “DuckDB in Science” meetup on September 4 in London, co-located with VLDB 2025. 🔍 We'll have two deep-dive presentations from DuckDB's developers: Laurens Kuiper will talk ab...
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Mike Sperber @sperbsen.bsky.social · 26/08/2025
The Call for the 2026 International Symposium on Functional and Logic Programming (FLOPS) is open - the symposium will be May 26-28 in Akita, Japan. Deadline for the CfP is Dec 8 (abstracts) / Dec 16 (submissions). Send us your best on the best of both worlds! functional-logic.org/events/flops...
functional-logic.org
FLOPS 2026 - Call for Papers | Functional Logic Programming
18th International Symposium on Functional and Logic Programming
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