Merge branch '218036-cannot-delete-account-on-gitlab-com' into 'master'

Add index in issues on last_edited_by_id

Closes #218036

See merge request gitlab-org/gitlab!33075

changelogs/unreleased/218036-cannot-delete-account-on-gitlab-com.yml

+---
+title: Add index to issues and epics on last_edited_by_id
+merge_request: 33075
+author:
+type: performance

db/migrate/20200526153844_add_issues_last_edited_by_id_index.rb

+# frozen_string_literal: true
+
+class AddIssuesLastEditedByIdIndex < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :issues, :last_edited_by_id
+    add_concurrent_index :epics, :last_edited_by_id
+  end
+
+  def down
+    remove_concurrent_index :issues, :last_edited_by_id
+    remove_concurrent_index :epics, :last_edited_by_id
+  end
+end

db/structure.sql

@@ -9642,6 +9642,8 @@ CREATE INDEX index_epics_on_group_id_and_iid_varchar_pattern ON public.epics USI
 
 CREATE INDEX index_epics_on_iid ON public.epics USING btree (iid);
 
+CREATE INDEX index_epics_on_last_edited_by_id ON public.epics USING btree (last_edited_by_id);
+
 CREATE INDEX index_epics_on_lock_version ON public.epics USING btree (lock_version) WHERE (lock_version IS NULL);
 
 CREATE INDEX index_epics_on_parent_id ON public.epics USING btree (parent_id);
@@ -9876,6 +9878,8 @@ CREATE INDEX index_issues_on_description_trigram ON public.issues USING gin (des
 
 CREATE INDEX index_issues_on_duplicated_to_id ON public.issues USING btree (duplicated_to_id) WHERE (duplicated_to_id IS NOT NULL);
 
+CREATE INDEX index_issues_on_last_edited_by_id ON public.issues USING btree (last_edited_by_id);
+
 CREATE INDEX index_issues_on_lock_version ON public.issues USING btree (lock_version) WHERE (lock_version IS NULL);
 
 CREATE INDEX index_issues_on_milestone_id ON public.issues USING btree (milestone_id);
@@ -13959,6 +13963,7 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200525114553
 20200525121014
 20200526120714
+20200526153844
 20200526164946
 20200526164947
 20200527094322