search

vaexio / vaex

Out-of-Core hybrid Apache Arrow/NumPy DataFrame for Python, ML, visualization and exploration of big tabular data at a billion rows per second 🚀
https://vaex.io
MIT License
8.28k stars 590 forks source link

🐛 wrong order of casting and subtracting offset cause overflow #2065

Closed maartenbreddels closed 2 years ago

maartenbreddels commented 2 years ago 
Which could lead to wrong groupby results.
Fixes: #2048