[kostadin]

It’s a DAG so you can just overengineer it with postgres and a transitive closure.

[iso8859-1]

What if you're your own grandpa? https://www.youtube.com/watch?v=eYlJH81dSiw ;)

[kostadin]

Easy, add a “roles” temporal table to store all these rels and more.

Hilarious song and a decent viz, thanks for sharing :]