Nikolas Göbel

Fix aggregations and extend set of built-in functions

1

- [x] COUNT is actually SUM at the moment, because I am an idiot - [x] MIN and MAX do not group correctly - [x] No support for something like...

We are often interested in the top k results, ordered by some symbol, i.e. in a combination of ORDER_BY and LIMIT. Without a limit, sorting isn't really something we can...

A few are done in https://github.com/comnik/declarative-dataflow/blob/master/tests/query_test.rs, the rest needs to follow.

It might make sense to have an option for the frontend to annotate `Rule`'s as not requiring recursion. This would allow us to avoid creating a `Variable` and to create...

Proof-of-concept: Historical queries

1

We should experiment with something similar to `as-of` queries in Datomic and what implications it would have for indexing and overall performance.