Safe Haskell	None
Language	Haskell2010

Database.PostgreSQL.PQTypes.Internal.Notification

Synopsis

Documentation

Representation of notification channel.

Constructors

Instances details

IsString Channel Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods fromString :: String -> Channel #
Show Channel Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods showsPrec :: Int -> Channel -> ShowS # show :: Channel -> String # showList :: [Channel] -> ShowS #
Eq Channel Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods (==) :: Channel -> Channel -> Bool # (/=) :: Channel -> Channel -> Bool #
Ord Channel Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods compare :: Channel -> Channel -> Ordering # (<) :: Channel -> Channel -> Bool # (<=) :: Channel -> Channel -> Bool # (>) :: Channel -> Channel -> Bool # (>=) :: Channel -> Channel -> Bool # max :: Channel -> Channel -> Channel # min :: Channel -> Channel -> Channel #

Representation of a notification sent by PostgreSQL.

Constructors

Notification
Fields ntPID :: !CPid Process ID of notifying server. ntChannel :: !Channel Notification channel name. ntPayload :: !Text Notification payload string.

Instances details

Storable Notification Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods sizeOf :: Notification -> Int # alignment :: Notification -> Int # peekElemOff :: Ptr Notification -> Int -> IO Notification # pokeElemOff :: Ptr Notification -> Int -> Notification -> IO () # peekByteOff :: Ptr b -> Int -> IO Notification # pokeByteOff :: Ptr b -> Int -> Notification -> IO () # peek :: Ptr Notification -> IO Notification # poke :: Ptr Notification -> Notification -> IO () #
Show Notification Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods showsPrec :: Int -> Notification -> ShowS # show :: Notification -> String # showList :: [Notification] -> ShowS #
Eq Notification Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods (==) :: Notification -> Notification -> Bool # (/=) :: Notification -> Notification -> Bool #
Ord Notification Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Internal.Notification Methods compare :: Notification -> Notification -> Ordering # (<) :: Notification -> Notification -> Bool # (<=) :: Notification -> Notification -> Bool # (>) :: Notification -> Notification -> Bool # (>=) :: Notification -> Notification -> Bool # max :: Notification -> Notification -> Notification # min :: Notification -> Notification -> Notification #

Low-level function that waits for a notification for a given number of microseconds (it uses timeout function internally).