If you're interested, this isn't an alternative implementation of ggsql's syntax (I published this last year and it is based on a slightly modified layered grammar), but the SGL language is a similar take on the grammar of graphics + SQL idea: https://arxiv.org/pdf/2505.14690. Currently implemented as an R package: https://sgl-projects.github.io/rsgl/index.html.

Well done for laying that down in that way! I'm just wondering how much it would be on my side to support that, since I can see that you support cases like "count(*)" and "group by" inside visualize. I can see you have a full bison grammar, I only have a custom parser at the moment, but at least your implementation is in C. But I'm happy to follow thomasp85.