Safe Haskell	None
Language	Haskell2010

Hasura.Backends.DataConnector.Schema.Column

Synopsis

data Column = Column {
- name :: Name
- type_ :: Type
- isNullable :: Bool
- description :: Maybe Text
}

Documentation

data Column Source #

A schematic representation which captures common attributes associated with a piece of data that is stored in a given backend.

These attributes ascribe meaningful semantics to the data that they are associated with.

cf. https://en.wikipedia.org/wiki/Column_(database) https://www.postgresql.org/docs/13/ddl-basics.html

XXX: Instead of an isNullable flag, should we instead add a Nullable data constructor to Type?

Constructors

Column
Fields name :: Name type_ :: Type isNullable :: Bool description :: Maybe Text

Instances

Instances details

Eq Column Source #
Instance details Defined in Hasura.Backends.DataConnector.Schema.Column Methods (==) :: Column -> Column -> Bool # (/=) :: Column -> Column -> Bool #
Data Column Source #
Instance details Defined in Hasura.Backends.DataConnector.Schema.Column Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Column -> c Column # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Column # toConstr :: Column -> Constr # dataTypeOf :: Column -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Column) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Column) # gmapT :: (forall b. Data b => b -> b) -> Column -> Column # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Column -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Column -> r # gmapQ :: (forall d. Data d => d -> u) -> Column -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Column -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Column -> m Column # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Column -> m Column # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Column -> m Column #
Ord Column Source #
Instance details Defined in Hasura.Backends.DataConnector.Schema.Column Methods compare :: Column -> Column -> Ordering # (<) :: Column -> Column -> Bool # (<=) :: Column -> Column -> Bool # (>) :: Column -> Column -> Bool # (>=) :: Column -> Column -> Bool # max :: Column -> Column -> Column # min :: Column -> Column -> Column #
Show Column Source #
Instance details Defined in Hasura.Backends.DataConnector.Schema.Column Methods showsPrec :: Int -> Column -> ShowS # show :: Column -> String # showList :: [Column] -> ShowS #
Generic Column Source #
Instance details Defined in Hasura.Backends.DataConnector.Schema.Column Associated Types type Rep Column :: Type -> Type # Methods from :: Column -> Rep Column x # to :: Rep Column x -> Column #
type Rep Column Source #
Instance details Defined in Hasura.Backends.DataConnector.Schema.Column type Rep Column = D1 ('MetaData "Column" "Hasura.Backends.DataConnector.Schema.Column" "graphql-engine-1.0.0-inplace" 'False) (C1 ('MetaCons "Column" 'PrefixI 'True) ((S1 ('MetaSel ('Just "name") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 Name) :: S1 ('MetaSel ('Just "type_") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 Type)) :: (S1 ('MetaSel ('Just "isNullable") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 Bool) :*: S1 ('MetaSel ('Just "description") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe Text)))))