Not directly DuckDB (though I think it might be able to be connected to that), but I think Apache Datafusion Ballista[0] would be a typical modern open source benchmark here.

[0]: https://datafusion.apache.org/ballista/contributors-guide/ar...

DeepSeek released smallpond

0 - https://github.com/deepseek-ai/smallpond

1 - https://www.definite.app/blog/smallpond (overview for data engineers, practical application)