It seems to be possible to invoke Haskell within PostgreSQL queries, see: https://www.postgresql.org/about/news/plhaskell-v20-2597/ (1) Is it popular in the Haskell community? Or is it a proof-of-concept project to show that it can be done? (2) Does it have some easy-to-install packaging? All my initial attempts to follow the online installation instructions have resulted in aggravated lower back pain... -- Matti Nykänen