diff --git a/src/db/main-db.cpp b/src/db/main-db.cpp
index 0991adb06..b90190adb 100644
--- a/src/db/main-db.cpp
+++ b/src/db/main-db.cpp
@@ -312,8 +312,27 @@ MainDb::MainDb () : AbstractDb(*new MainDbPrivate) {}
 		time_t date,
 		const string &peerAddress
 	) const {
-		// TODO.
-		return nullptr;
+		unsigned int notifyId;
+		string participantAddress;
+		string gruuAddress;
+
+		soci::session *session = dbSession.getBackendSession<soci::session>();
+		*session << "SELECT notify_id, participant_address_id, gruu_address_id"
+			"  FROM conference_notified_event, conference_participant_event, conference_participant_device_event"
+			"  WHERE conference_participant_device_event.event_id = :eventId"
+			"    AND conference_participant_event.event_id = conference_participant_device_event.event_id"
+			"    AND conference_notified_event.event_id = conference_participant_event.event_id",
+			soci::into(notifyId), soci::into(participantAddress), soci::into(gruuAddress), soci::use(eventId);
+
+		// TODO: Use cache.
+		return make_shared<ConferenceParticipantDeviceEvent>(
+			type,
+			date,
+			Address(peerAddress),
+			notifyId,
+			Address(participantAddress),
+			Address(gruuAddress)
+		);
 	}
 
 	shared_ptr<EventLog> MainDbPrivate::selectConferenceSubjectEvent (