[Haskell-cafe] Using Haskell types in a database

[Tom Ellis]

On Tue, Feb 10, 2015 at 09:02:58PM +0300, Nikita Karetnikov wrote:
> > That part I don't understand.  Why does your proposal require varchars
> > everywhere?
> 
> I assume that Persistent (or its PostgreSQL backend) has a predefined
> mapping from a commonly used Haskell types to the database types.
> And everything else is represented as a varchar.

OK, well that's surprising.  Opaleye by contrast does not force everything
into a varchar.

Tom