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Within LTS Haskell 24.51 (ghc-9.10.3)

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  1. maxMaybe :: (Ord a, AggregatedContext ac, SqlContext ac) => Record Flat (Maybe a) -> Record ac (Maybe a)

    relational-query Database.Relational.Arrow

    Aggregation function MAX.

  2. minMaybe :: (Ord a, AggregatedContext ac, SqlContext ac) => Record Flat (Maybe a) -> Record ac (Maybe a)

    relational-query Database.Relational.Arrow

    Aggregation function MIN.

  3. negateMaybe :: (OperatorContext c, Num a) => Record c (Maybe a) -> Record c (Maybe a)

    relational-query Database.Relational.Arrow

    Number negate uni-operator corresponding SQL -.

  4. queryMaybe :: forall (m :: Type -> Type) r . (MonadQualify ConfigureQuery m, MonadQuery m) => Relation () r -> QueryA m () (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.

  5. 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.

  6. 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.

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

    relational-query Database.Relational.Arrow

    Aggregation function SUM.

  8. 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.

  9. 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.

  10. class ProjectableFlattenMaybe a b

    relational-query Database.Relational.Projectable

    Interface to compose phantom Maybe nested type.

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