Add database indexes to timestamp columns (#4314)

* Add database indexes to timestamp columns

* add indexes to session table

store/sql_webhook_store.go

@@ -44,6 +44,14 @@ func (s SqlWebhookStore) CreateIndexesIfNotExists() {
 	s.CreateIndexIfNotExists("idx_incoming_webhook_user_id", "IncomingWebhooks", "UserId")
 	s.CreateIndexIfNotExists("idx_incoming_webhook_team_id", "IncomingWebhooks", "TeamId")
 	s.CreateIndexIfNotExists("idx_outgoing_webhook_team_id", "OutgoingWebhooks", "TeamId")
+
+	s.CreateIndexIfNotExists("idx_incoming_webhook_update_at", "IncomingWebhooks", "UpdateAt")
+	s.CreateIndexIfNotExists("idx_incoming_webhook_create_at", "IncomingWebhooks", "CreateAt")
+	s.CreateIndexIfNotExists("idx_incoming_webhook_delete_at", "IncomingWebhooks", "DeleteAt")
+
+	s.CreateIndexIfNotExists("idx_outgoing_webhook_update_at", "OutgoingWebhooks", "UpdateAt")
+	s.CreateIndexIfNotExists("idx_outgoing_webhook_create_at", "OutgoingWebhooks", "CreateAt")
+	s.CreateIndexIfNotExists("idx_outgoing_webhook_delete_at", "OutgoingWebhooks", "DeleteAt")
 }
 
 func (s SqlWebhookStore) SaveIncoming(webhook *model.IncomingWebhook) StoreChannel {