1 files changed, 58 insertions, 0 deletions
diff --git a/internal/db/bundb/hook.go b/internal/db/bundb/hook.go
new file mode 100644
index 000000000..6f9935272
--- /dev/null
+++ b/internal/db/bundb/hook.go
@@ -0,0 +1,58 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package bundb
+
+import (
+	"context"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/uptrace/bun"
+)
+
+// queryHook implements bun.QueryHook
+type queryHook struct{}
+
+func (queryHook) BeforeQuery(ctx context.Context, _ *bun.QueryEvent) context.Context {
+	return ctx // do nothing
+}
+
+// AfterQuery logs the time taken to query, the operation (select, update, etc), and the query itself as translated by bun.
+func (queryHook) AfterQuery(_ context.Context, event *bun.QueryEvent) {
+	// Get the DB query duration
+	dur := time.Since(event.StartTime)
+
+	log := func(lvl logrus.Level, msg string) {
+		logrus.WithFields(logrus.Fields{
+			"duration":  dur,
+			"operation": event.Operation(),
+			"query":     event.Query,
+		}).Log(lvl, msg)
+	}
+
+	switch {
+	// Warn on slow database queries
+	case dur > time.Second:
+		log(logrus.WarnLevel, "SLOW DATABASE QUERY")
+
+	// On trace, we log query information
+	case logrus.GetLevel() == logrus.TraceLevel:
+		log(logrus.TraceLevel, "database query")
+	}
+}