Fixed regression on lookup performance (introduced when added track/artist links)

src/api/subsonic/SubsonicResource.cpp

@@ -617,7 +617,7 @@ artistToResponseNode(const Database::User::pointer& user, const Database::Artist
 	artistNode.setAttribute("name", artist->getName());
 
 	if (id3)
-		artistNode.setAttribute("albumCount", std::to_string(artist->getReleases().size()));
+		artistNode.setAttribute("albumCount", std::to_string(artist->getReleaseCount()));
 
 	if (user->hasStarredArtist(artist))
 		artistNode.setAttribute("starred", reportedStarredDate);

src/database/Artist.cpp

@@ -213,6 +213,18 @@ Artist::getReleases(const std::set<IdType>& clusterIds) const
 	return std::vector<Wt::Dbo::ptr<Release>>(res.begin(), res.end());
 }
 
+std::size_t
+Artist::getReleaseCount() const
+{
+	assert(self());
+	assert(IdIsValid(self()->id()));
+	assert(session());
+
+	int res = session()->query<int>("SELECT COUNT(DISTINCT r.id) FROM release r INNER JOIN artist a ON a.id = t_a_l.artist_id INNER JOIN track_artist_link t_a_l ON t_a_l.track_id = t.id INNER JOIN track t ON t.release_id = r.id")
+		.where("a.id = ?").bind(self()->id());
+	return res;
+}
+
 std::vector<Wt::Dbo::ptr<Track>>
 Artist::getTracks(boost::optional<TrackArtistLink::Type> linkType) const
 {

src/database/Artist.hpp

@@ -70,6 +70,7 @@ class Artist : public Wt::Dbo::Dbo<Artist>
 		const std::string& getMBID(void) const { return _MBID; }
 
 		std::vector<Wt::Dbo::ptr<Release>>	getReleases(const std::set<IdType>& clusterIds = std::set<IdType>()) const;
+		std::size_t				getReleaseCount() const;
 		std::vector<Wt::Dbo::ptr<Track>>	getTracks(boost::optional<TrackArtistLink::Type> linkType = {}) const;
 		std::vector<Wt::Dbo::ptr<Track>>	getTracksWithRelease(boost::optional<TrackArtistLink::Type> linkType = {}) const;
 		std::vector<Wt::Dbo::ptr<Track>>	getRandomTracks(boost::optional<std::size_t> count) const;

src/database/DatabaseHandler.cpp

@@ -230,15 +230,23 @@ Handler::Handler(Wt::Dbo::SqlConnectionPool& connectionPool)
 		Wt::Dbo::Transaction transaction {_session};
 
 		// Indexes
-		_session.execute("CREATE INDEX IF NOT EXISTS track_path_idx ON track(file_path)");
-		_session.execute("CREATE INDEX IF NOT EXISTS track_name_idx ON track(name)");
 		_session.execute("CREATE INDEX IF NOT EXISTS artist_name_idx ON artist(name)");
-		_session.execute("CREATE INDEX IF NOT EXISTS release_name_idx ON release(name)");
-		_session.execute("CREATE INDEX IF NOT EXISTS track_release_idx ON track(release_id)");
+		_session.execute("CREATE INDEX IF NOT EXISTS artist_mbid_idx ON artist(mbid)");
 		_session.execute("CREATE INDEX IF NOT EXISTS cluster_name_idx ON cluster(name)");
 		_session.execute("CREATE INDEX IF NOT EXISTS cluster_type_name_idx ON cluster_type(name)");
+		_session.execute("CREATE INDEX IF NOT EXISTS release_name_idx ON release(name)");
+		_session.execute("CREATE INDEX IF NOT EXISTS release_mbid_idx ON release(mbid)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_path_idx ON track(file_path)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_name_idx ON track(name)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_mbid_idx ON track(mbid)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_release_idx ON track(release_id)");
 		_session.execute("CREATE INDEX IF NOT EXISTS tracklist_name_idx ON tracklist(name)");
+		_session.execute("CREATE INDEX IF NOT EXISTS tracklist_user_idx ON tracklist(user_id)");
 		_session.execute("CREATE INDEX IF NOT EXISTS track_features_track_idx ON track_features(track_id)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_artist_link_artist_idx ON track_artist_link(artist_id)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_artist_link_name_idx ON track_artist_link(name)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_artist_link_track_idx ON track_artist_link(track_id)");
+		_session.execute("CREATE INDEX IF NOT EXISTS track_artist_link_type_idx ON track_artist_link(type)");
 	}
 
 	_users = new UserDatabase(_session);