opaleye-0.3: An SQL-generating DSL targeting PostgreSQL

Safe Haskell	None
Language	Haskell98

Opaleye.Internal.QueryArr

Documentation

newtype QueryArr a b Source

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 () Source

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

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

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

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

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