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  1. queryMaybe' :: forall (m :: Type -> Type) p r . (MonadQualify ConfigureQuery m, MonadQuery m) => Relation p r -> QueryA m () (PlaceHolders p, Record Flat (Maybe r))

    relational-query Database.Relational.Arrow

    Same as queryMaybe'. Arrow version. The result arrow is not injected by any local projected records.

  2. showNumMaybe :: (SqlContext c, Num a, IsString b) => Record c (Maybe a) -> Record c (Maybe b)

    relational-query Database.Relational.Arrow

    Unsafely show number into string-like type in records.

  3. sumMaybe :: (Num a, AggregatedContext ac, SqlContext ac) => Record Flat (Maybe a) -> Record ac (Maybe a)

    relational-query Database.Relational.Arrow

    Aggregation function SUM.

  4. uniqueQueryMaybe' :: UniqueRelation p c r -> QueryA QueryUnique () (PlaceHolders p, Record c (Maybe r))

    relational-query Database.Relational.Arrow

    Same as uniqueQueryMaybe'. Arrow version. The result arrow is not injected by local projected records.

  5. queryMaybe' :: MonadQuery m => Relation p r -> m (PlaceHolders p, Record Flat (Maybe r))

    relational-query Database.Relational.Monad.Class

    Join sub-query with place-holder parameter p. Query result is Maybe.

  6. class ProjectableFlattenMaybe a b

    relational-query Database.Relational.Projectable

    Interface to compose phantom Maybe nested type.

  7. class ProjectableMaybe (p :: Type -> Type)

    relational-query Database.Relational.Projectable

    Interface to control Maybe of phantom type in records.

  8. avgMaybe :: (Num a, Fractional b, AggregatedContext ac, SqlContext ac) => Record Flat (Maybe a) -> Record ac (Maybe b)

    relational-query Database.Relational.Projectable

    Aggregation function AVG.

  9. caseMaybe :: (OperatorContext c, PersistableWidth b) => Record c a -> [(Record c a, Record c (Maybe b))] -> Record c (Maybe b)

    relational-query Database.Relational.Projectable

    Null default version of case'.

  10. caseSearchMaybe :: (OperatorContext c, PersistableWidth a) => [(Predicate c, Record c (Maybe a))] -> Record c (Maybe a)

    relational-query Database.Relational.Projectable

    Null default version of caseSearch.

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