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1. fromMaybeFields :: Default IfPP b b => b -> MaybeFields b -> b

   opaleye	Opaleye.MaybeFields

   The Opaleye analogue of fromMaybe

2. fromMaybeFieldsExplicit :: IfPP b b -> b -> MaybeFields b -> b

   opaleye	Opaleye.MaybeFields

   No documentation available.

3. matchMaybe :: Default IfPP b b => MaybeFields a -> (Maybe a -> b) -> b

   opaleye	Opaleye.MaybeFields

   Use a Haskell \case expression to pattern match on a MaybeFields.

   example :: MaybeFields (Field SqlInt4) -> Field SqlInt4
   example mf = matchMaybe mf $ \case
   Nothing -> 0
   Just x  -> x * 100
   

4. nullableToMaybeFields :: FieldNullable a -> MaybeFields (Field a)

   opaleye	Opaleye.MaybeFields

   Convert NULL to nothingFields and non-NULL to a justFields

5. nullspecMaybeFields :: Nullspec a b -> Nullspec (MaybeFields a) (MaybeFields b)

   opaleye	Opaleye.MaybeFields

   No documentation available.

6. toFieldsMaybeFields :: Nullspec a b -> ToFields a b -> ToFields (Maybe a) (MaybeFields b)

   opaleye	Opaleye.MaybeFields

   No documentation available.

7. traverseMaybeFields :: (Default Unpackspec a a, Default Unpackspec b b) => SelectArr a b -> SelectArr (MaybeFields a) (MaybeFields b)

   opaleye	Opaleye.MaybeFields

   traverseMaybeFields is analogous to Haskell's traverse :: (a -> [b]) -> Maybe a -> [Maybe b]. In particular, traverse has the following definition that generalises to traverseMaybeFields:

   • traverse _ Nothing = pure Nothing

   • traverse f (Just x) = fmap Just (f x)

8. traverseMaybeFieldsExplicit :: Unpackspec a a -> Unpackspec b b -> SelectArr a b -> SelectArr (MaybeFields a) (MaybeFields b)

   opaleye	Opaleye.MaybeFields

   No documentation available.

9. unpackspecMaybeFields :: Unpackspec a b -> Unpackspec (MaybeFields a) (MaybeFields b)

   opaleye	Opaleye.MaybeFields

   No documentation available.

10. valuesspecMaybeFields :: Valuesspec a b -> Valuesspec (MaybeFields a) (MaybeFields b)

    opaleye	Opaleye.MaybeFields

    No documentation available.

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