24 May
2010
24 May
'10
10:40 a.m.
2010/5/23 Günther Schmidt
is there anybody currently using Haskell to construct or implement a query language?
I've a half-baked, type-indexed (in HList style) implementation of relational algebra lying around somewhere, if that counts as a "query language". I was experimenting with using it as a sort of abstract collection interface, which actually worked rather nicely I think, but I didn't have time to flesh it out completely. In particular, only very simple queries and limited kinds of relation composition were supported. Definitely just toy code, though, and dreadfully inefficient; if you're looking for an "actual implementation" meaning "usable interface to an external persistence layer" then disregard this. - C.