Improve get stats db function performance

database/migrations/functions/stats/get_stats.sql

@@ -78,8 +78,8 @@ returns setof json as $$
                         get_package_summary(jsonb_build_object('package_id', package_id)) as package,
                         sum(total) as total
                     from package_views
-                    where date_trunc('year', day) = date_trunc('year', current_date)
-                    and date_trunc('month', day) = date_trunc('month', current_date)
+                    where date_trunc('year', day::timestamp) = date_trunc('year', current_timestamp)
+                    and date_trunc('month', day::timestamp) = date_trunc('month', current_timestamp)
                     and package_id is not null
                     group by package_id
                     order by total desc

database/migrations/schema/052_package_views_year_month_index.sql

@@ -0,0 +1,5 @@
+create index if not exists package_views_year_month_idx on package_views (date_trunc('year', day::timestamp), date_trunc('month', day::timestamp));
+
+---- create above / drop below ----
+
+drop index if exists package_views_year_month_idx;

database/tests/schema/schema.sql

@@ -354,7 +354,8 @@ select indexes_are('package_category', array[
     'package_category_pkey'
 ]);
 select indexes_are('package_views', array[
-    'package_views_package_id_version_day_key'
+    'package_views_package_id_version_day_key',
+    'package_views_year_month_idx'
 ]);
 select indexes_are('package__maintainer', array[
     'package__maintainer_pkey'