I love older papers.

Lenstra and Kan, 1979 "Computational Complexity of Discrete Optimization Problems" Annals of Discrete Mathematics

#orms

"The fastest way of processing data is to not process it."

Our SIGMOD 2025 paper shows how Snowflake skips 99.4% of data with new pruning techniques for LIMIT, top-k, and JOIN queries.

Blog: snowflakepruning.github.io
Paper: arxiv.org/abs/2504.11540

@sigmod2025.bsky.social

Camera-ready version of the paper submitted => 115 tabs in Chrome closed.

We just released Redbench, a new benchmark that contains 30 analytical SQL workloads that can be used to benchmark workload-driven optimizations. Go check it out!

GitHub: github.com/utndatasyste...

The first day of the BTW Conference in Bamberg is coming to an end.

Some personal favorites:
- Ismail's talk on Pruning in Snowflake
- @stefan-grafberger.com's talk on what-if analysis in ML pipelines and automatically patching ML pipelines in the background
- Observe Inc's presentation

Please help spread the word by reposting!

We've just created the official DEEM Workshop account: @deem-workshop.bsky.social

My very first paper got accepted to @sigmod2025.bsky.social! Yay! Means I'll be playing a home game in Berlin

Reading cacm.acm.org/blogcacm/21s... makes me think that Rust was just a giant research project and valuable findings are now being streamed back into C++, making them usable to a broader audience.

My professor jokingly threatened me that I would get fired if my VO2 Max is too low. After a run with him it's at 58 now. I guess I can continue my PhD 😋

The Nuremberg Data Systems Lab is now on Bluesky 🙌 @utndatasystems.bsky.social

In academia, everyone always has a Colleague Working On Exactly This Problem. I still have to find one. Applications open.

Exciting News! 🎉
#Tampere will host EDBT/ICDT 2026! ✨
Even before the 2025 edition, the important dates are already out:
📅 Round 1 starts on:
February 5 for EDBT Papers
March 13 for ICDT Papers
edbticdt2026.github.io

We can’t wait to see your great submissions and welcome you to Tampere! 🙌

The @sigmod2025.bsky.social Programming Contest goes into another round. We (Bo Tang, Tilmann Rabl, and myself) just published the timeline and task overview:
sigmod-contest-2025.github.io/index.html

Thanks to Carlo Curino and @microsoft.com for the continued support.

If I’m ever a professor again, I want to give a graduate seminar, topics to include:

- how not to say stupid shit about fields outside your expertise
- what is your expertise, anyway?
- how not to be an insufferable bore
- your PhD doesn’t make you a better person: coping with that

Other ideas?

I love how dedicated some students are. They are supposed to create a 5min video about a topic and one of them sends me their slides for review. 15(!) detailed(!) slides(!)

I proudly sneaked in an example about nature conservation into a database research paper 🌳

The scale of Google Spanner is staggering - 5 billion queries per second! youtu.be/uy3LjRPFoKw?...