Safe Haskell	None
Language	Haskell98

Opaleye.QueryArr

Description

This modules defines the QueryArr arrow, which is an arrow that represents selecting data from a database, and composing multiple queries together.

Synopsis

Documentation

QueryArr a b is analogous to a Haskell function a -> [b].

Instances

Arrow QueryArr Source
ProductProfunctor QueryArr Source
Profunctor QueryArr Source
Category * QueryArr Source
Functor (QueryArr a) Source
Applicative (QueryArr a) Source

Query a is analogous to a Haskell value [a].