Add index on resource_weight_events for created_at

changelogs/unreleased/38096-add-index-on-resource-weight-events-created-at-pd.yml

+---
+title: Add index to issue_id and created_at of resource_weight_events
+merge_request: 28930
+author:
+type: other

db/migrate/20200406141452_add_index_to_issue_id_and_created_at_on_resource_weight_events.rb

+# frozen_string_literal: true
+
+class AddIndexToIssueIdAndCreatedAtOnResourceWeightEvents < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  INDEX_NAME = 'index_resource_weight_events_on_issue_id_and_created_at'
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :resource_weight_events, [:issue_id, :created_at], name: INDEX_NAME
+  end
+
+  def down
+    remove_concurrent_index_by_name :resource_weight_events, INDEX_NAME
+  end
+end

db/structure.sql

@@ -10160,6 +10160,8 @@ CREATE INDEX index_resource_milestone_events_on_milestone_id ON public.resource_
 
 CREATE INDEX index_resource_milestone_events_on_user_id ON public.resource_milestone_events USING btree (user_id);
 
+CREATE INDEX index_resource_weight_events_on_issue_id_and_created_at ON public.resource_weight_events USING btree (issue_id, created_at);
+
 CREATE INDEX index_resource_weight_events_on_issue_id_and_weight ON public.resource_weight_events USING btree (issue_id, weight);
 
 CREATE INDEX index_resource_weight_events_on_user_id ON public.resource_weight_events USING btree (user_id);
@@ -13232,6 +13234,7 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200406102111
 20200406102120
 20200406135648
+20200406141452
 20200406192059
 20200406193427
 20200407094005