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

[Tom Ellis]

On Fri, Dec 19, 2014 at 12:39:01PM +0900, Kei Hibino wrote:
> From: Manuel Gómez <targen at gmail.com>
> Subject: Re: [Haskell-cafe] [ANN] relational-record - relational-algebraic query building DSL
> Date: Sun, 14 Dec 2014 12:22:25 -0430
> 
> > On Sun, Dec 14, 2014 at 12:04 PM, Kei Hibino <ex8k.hibino at gmail.com> wrote:
> >> I am happy to announce relational-record library and its project page.
> >>
> >> relational-record is domain specific language for type-safe SQL query building,
> >> and database access API with compile time schema generators.
> >
> > Congratulations on the release!  It’s great to see more and more
> > interesting abstractions for relational databases in the Haskell
> > ecosystem.
> >
> > It looks like this project shares many goals with Tom Ellis’ excellent
> > and recently released[1] Opaleye library.  How would you say your
> > approach compares with Opaleye’s?
> >
> > [1]: <www.reddit.com/r/haskell/comments/2nxx7n/announcing_opaleye_sqlgenerating_embedded_domain/>
> 
> Relational Record and Opaleye resembles in approach of building
> not aggregated SQL query.
> 
> Opaleye's method using arrow notation is very cool.

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

    https://github.com/m4dc4p/haskelldb/issues/22

Tom