Database.PostgreSQL.PQTypes.Notification

Documentation

newtype Channel

Representation of notification channel.

Constructors

Channel (RawSQL ())

Instances

Eq Channel

Ord Channel

Show Channel

IsString 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

listen :: MonadDB m => Channel -> m ()

Start listening for notifications on a given channel.

unlisten :: MonadDB m => Channel -> m ()

Stop listening for notifications on a given channel.

unlistenAll :: MonadDB m => m ()

Cancel all listener registrations for the current session.

notify :: MonadDB m => Channel -> ByteString -> m ()

Generate a notification on a given channel.