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

   relational-schemas	Database.Custom.SQLServer

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

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

   relational-schemas	Database.Custom.SQLServer

   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-schemas	Database.Custom.SQLServer

   Aggregation function SUM.

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

   relational-schemas	Database.Custom.SQLServer

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

5. class ProjectableFlattenMaybe a b

   relational-schemas	Database.Custom.SQLite3

   Interface to compose phantom Maybe nested type.

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

   relational-schemas	Database.Custom.SQLite3

   Interface to control Maybe of phantom type in records.

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

   relational-schemas	Database.Custom.SQLite3

   Aggregation function AVG.

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

   relational-schemas	Database.Custom.SQLite3

   Null default version of case'.

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

   relational-schemas	Database.Custom.SQLite3

   Null default version of caseSearch.

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

    relational-schemas	Database.Custom.SQLite3

    Compose nested Maybe phantom type on record.

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