Hello, A couple of weeks ago I asked if there was interest in a library that implements a type-safe relational algebra. The response was positive, so I have spruced up the code I had a bit and created a repository on GitHub at:
https://github.com/PaulVisschers/relational-algebra It is a very rudimentary version. The code is not documented and there is only a very basic example database in Test.hs. It might be helpful to look at HaskellDB's PrimQuery and PrimExpr, as this library is mostly a direct copy from that (but typed). I will add some decent examples of expressions and queries shortly. If you check it out, please comment on it and let me know if you want to contribute. Since this is going to be my first release, any feedback is welcome. Paul Visschers
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