Database.PostgreSQL.PQTypes.Internal.Notification

Documentation

newtype Channel

Representation of notification channel.

Constructors

Channel (RawSQL ())

Instances

Eq Channel

Ord Channel

Show Channel

IsString Channel

Typeable * Channel

data Notification

Representation of a notification sent by PostgreSQL.

Constructors

Notification

Fields

ntPID :: !CPid

Process ID of notifying server.

ntChannel :: !Channel

Notification channel name.

ntPayload :: !ByteString

Notification payload string.

Instances

Eq Notification

Ord Notification

Show Notification

Storable Notification

Typeable * Notification

getNotificationIO :: DBState -> Int -> IO (Maybe Notification)

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