Opaleye.RunQuery

Documentation

runQuery :: Default QueryRunner columns haskells => Connection -> Query columns -> IO [haskells]

runQueryExplicit :: QueryRunner columns haskells -> Connection -> Query columns -> IO [haskells]

queryRunnerColumn :: (Column a' -> Column a) -> (b -> b') -> QueryRunnerColumn a b -> QueryRunnerColumn a' b'

Use queryRunnerColumn to make an instance to allow you to run queries on your own datatypes. For example:

newtype Foo = Foo Int
instance Default QueryRunnerColumn Foo Foo where
   def = queryRunnerColumn (unsafeCoerce :: Column Foo -> Column Int) Foo def

data QueryRunner columns haskells

Instances

ProductProfunctor QueryRunner

Profunctor QueryRunner

Default QueryRunnerColumn a b => Default QueryRunner (Column a) b

Functor (QueryRunner c)

Applicative (QueryRunner c)

data QueryRunnerColumn coltype haskell

Instances

Default QueryRunnerColumn Double Double

Default QueryRunnerColumn Int Int

Default QueryRunnerColumn Int64 Int64

Default QueryRunnerColumn Integer Integer

Default QueryRunnerColumn String String

Default QueryRunnerColumn a b => Default QueryRunnerColumn (Nullable a) (Maybe b)