Safe Haskell	None
Language	Haskell2010

Database.PostgreSQL.PQTypes.Internal.QueryResult

Synopsis

Documentation

Representation of a query result. Provides Functor and Foldable instances for data transformation and extraction appropriately.

Constructors

FromRow row => QueryResult
Fields qrSQL :: !SomeSQL qrResult :: !(ForeignPtr PGresult) qrFromRow :: !(row -> t)

Instances

Functor QueryResult Source #
Methods fmap :: (a -> b) -> QueryResult a -> QueryResult b # (<$) :: a -> QueryResult b -> QueryResult a #
Foldable QueryResult Source #
Methods fold :: Monoid m => QueryResult m -> m # foldMap :: Monoid m => (a -> m) -> QueryResult a -> m # foldr :: (a -> b -> b) -> b -> QueryResult a -> b # foldr' :: (a -> b -> b) -> b -> QueryResult a -> b # foldl :: (b -> a -> b) -> b -> QueryResult a -> b # foldl' :: (b -> a -> b) -> b -> QueryResult a -> b # foldr1 :: (a -> a -> a) -> QueryResult a -> a # foldl1 :: (a -> a -> a) -> QueryResult a -> a # toList :: QueryResult a -> [a] # null :: QueryResult a -> Bool # length :: QueryResult a -> Int # elem :: Eq a => a -> QueryResult a -> Bool # maximum :: Ord a => QueryResult a -> a # minimum :: Ord a => QueryResult a -> a # sum :: Num a => QueryResult a -> a # product :: Num a => QueryResult a -> a #

Extract number of returned tuples (rows) from query result.

Extract number of returned fields (columns) from query result.