Merge pull request #323 from kinvolk/query_optim

backend: Improve sql query performances

pkg/api/db/migrations/0011_add_composite_indexes.sql

@@ -0,0 +1,15 @@
+-- +migrate Up
+
+create index if not exists instance_application_instance_id_application_id_idx on instance_application (instance_id,application_id);
+
+create index if not exists activity_class_created_ts_severity_version_group_id_applica_idx on activity (class,created_ts,severity,"version",group_id,application_id);
+
+create index if not exists instance_application_application_id_group_id_last_check_for_idx on instance_application(application_id,group_id,last_check_for_updates,instance_id);
+
+-- +migrate Down
+
+drop index if exists instance_application_instance_id_application_id_idx;
+
+drop index if exists activity_class_created_ts_severity_version_group_id_applica_idx;
+
+drop index if exists instance_application_application_id_group_id_last_check_for_idx;

pkg/api/db/migrations/0012_drop_unused_indexes.sql

@@ -0,0 +1,23 @@
+-- +migrate Up
+
+drop index if exists users_team_id_idx;
+
+drop index if exists instance_status_history_application_id_idx;
+
+drop index if exists event_event_type_id_idx;
+
+drop index if exists event_application_id_idx;
+
+drop index if exists channel_package_id_idx;
+
+-- +migrate Down
+
+create index if not exists users_team_id_idx on users (team_id);
+
+create index if not exists instance_status_history_application_id_idx on instance_status_history (application_id);
+
+create index if not exists event_event_type_id_idx on event (event_type_id);
+
+create index if not exists event_application_id_idx on event (application_id);
+
+create index if not exists channel_package_id_idx on channel (package_id);

pkg/api/instances.go

@@ -475,7 +475,7 @@ func (api *API) instanceAppQuery(appID, instanceID string, duration postgresDura
 }
 
 func ignoreFakeInstanceCondition(instanceIDField string) string {
-	return fmt.Sprintf(`(%[1]s IS NULL OR %[1]s NOT SIMILAR TO '\{[a-fA-F0-9-]{36}\}')`, instanceIDField)
+	return fmt.Sprintf(`(%[1]s IS NULL OR %[1]s NOT LIKE '{________-____-____-____-____________}')`, instanceIDField)
 }
 
 func (api *API) getFilterInstancesQuery(selectPart exp.LiteralExpression, p InstancesQueryParams, duration postgresDuration) *goqu.SelectDataset {