[Haskell-cafe] [ANN] relational-record - relational-algebraic query building DSL

[Justin Bailey]

On Fri, Dec 19, 2014 at 4:44 AM, Tom Ellis
<tom-lists-haskell-cafe-2013 at jaguarpaw.co.uk> wrote:
> Opaleye uses arrows only because it is hard to implement a sensible
> semantics otherwise.  See, for example, this bug report on HaskellDB which
> used a monad rather than an arrow
>

I'm curious how arrows make it easier to deal with aggregation? Sounds
pretty interesting ...

Justin