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Within LTS Haskell 24.39 (ghc-9.10.3)

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  1. flattenMaybe :: ProjectableMaybe p => p (Maybe (Maybe a)) -> p (Maybe a)

    relational-query Database.Relational.Arrow

    Compose nested Maybe phantom type on record.

  2. flattenPiMaybe :: (PersistableWidth a, ProjectableFlattenMaybe (Maybe b) c) => Record cont (Maybe a) -> Pi a b -> Record cont c

    relational-query Database.Relational.Arrow

    Get narrower record with flatten leaf phantom Maybe types along with projection path.

  3. fromIntegralMaybe :: (SqlContext c, Integral a, Num b) => Record c (Maybe a) -> Record c (Maybe b)

    relational-query Database.Relational.Arrow

    Number fromIntegral uni-operator.

  4. fromMaybe :: (OperatorContext c, HasColumnConstraint NotNull r) => Record c r -> Record c (Maybe r) -> Record c r

    relational-query Database.Relational.Arrow

    Operator from maybe type using record extended isNull.

  5. likeMaybe :: (OperatorContext c, IsString a, LiteralSQL a) => Record c (Maybe a) -> a -> Record c (Maybe Bool)

    relational-query Database.Relational.Arrow

    String-compare operator corresponding SQL LIKE . Maybe type version.

  6. likeMaybe' :: (OperatorContext c, IsString a) => Record c (Maybe a) -> Record c (Maybe a) -> Record c (Maybe Bool)

    relational-query Database.Relational.Arrow

    String-compare operator corresponding SQL LIKE .

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

    relational-query Database.Relational.Arrow

    Aggregation function MAX.

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

    relational-query Database.Relational.Arrow

    Aggregation function MIN.

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

    relational-query Database.Relational.Arrow

    Number negate uni-operator corresponding SQL -.

  10. 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.

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