Opaleye.Internal.QueryArr

Documentation

newtype QueryArr a b

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

Constructors

QueryArr ((a, PrimQuery, Tag) -> (b, PrimQuery, Tag))

Instances

Arrow QueryArr

ProductProfunctor QueryArr

Profunctor QueryArr

Category * QueryArr

Functor (QueryArr a)

Applicative (QueryArr a)

type Query = QueryArr ()

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

simpleQueryArr :: ((a, Tag) -> (b, PrimQuery, Tag)) -> QueryArr a b

runQueryArr :: QueryArr a b -> (a, PrimQuery, Tag) -> (b, PrimQuery, Tag)

runSimpleQueryArr :: QueryArr a b -> (a, Tag) -> (b, PrimQuery, Tag)

runSimpleQueryArrStart :: QueryArr a b -> a -> (b, PrimQuery, Tag)

runQueryArrUnpack :: Unpackspec a b -> Query a -> ([PrimExpr], PrimQuery, Tag)

first3 :: (a1 -> b) -> (a1, a2, a3) -> (b, a2, a3)