Opaleye.Internal.Join

Documentation

data NullMaker a b

Constructors

NullMaker (a -> b)

Instances

ProductProfunctor NullMaker

Profunctor NullMaker

Default NullMaker (Column a) (Column (Nullable a))

Default NullMaker (Column (Nullable a)) (Column (Nullable a))

toNullable :: NullMaker a b -> a -> b

extractLeftJoinFields :: Int -> Tag -> PrimExpr -> PM [(Symbol, PrimExpr)] PrimExpr