Are there any notable implementations of plain Datalog? If not, what’s the reason? Does vanilla Datalog have major limitations? Just curious.
Some notable others:
PreQL/Trilogy - https://github.com/trilogy-data/pytrilogy https://news.ycombinator.com/item?id=40728938
Malloy -https://www.malloydata.dev/ https://github.com/malloydata/malloy https://news.ycombinator.com/item?id=30053860
PRQL - https://prql-lang.org/ https://github.com/PRQL/prql https://news.ycombinator.com/item?id=36866861
Syntax not, but datalog (-ish) does. It's a more natural way (imho of course) to query data. Far more complex queries with less mental overload.
I think it's even worse, even stuff they do in their freetime have to be under the Google umbrella if they want to open-source it, just because they work during the daytime at Google.
I know of PathQuery[0], but that one doesn't have an open source implementation and is much more inspired by Graph query languages than SQL.