[Haskell-cafe] Interest in typed relational algebra library?

Paul Visschers mail at paulvisschers.net
Sat Jul 7 12:45:12 CEST 2012


I've been out of the Haskell game for a bit, but now I'm back. A couple of
years ago I made a small library that implements relational algebra with
types so that malformed queries and other operations are caught at compile
time. It is heavily based off of the internals of HaskellDB (see
but types so that it can actually be used directly instead of having to use
HaskellDB's query monad. Besides the joy of using relational algebra
directly in your code, this also means that you can make query-optimizing
code in a type-safe way, you can subquery results returned by the database
directly without accessing the database again and you have more options
when converting from relation algebra to SQL or another query language. The
library isn't quite ready for release, but I might want to work on it a bit
and then release it. Is anyone interested in such a library?

Paul Visschers
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