Improve various queries against account domains (#25126)

db/migrate/20230524190515_add_index_accounts_on_domain_and_id.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AddIndexAccountsOnDomainAndId < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def change
+    add_index :accounts, [:domain, :id], name: :index_accounts_on_domain_and_id, algorithm: :concurrently
+  end
+end

db/migrate/20230524192812_fix_account_domain_casing.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class FixAccountDomainCasing < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def up
+    safety_assured do
+      execute 'UPDATE accounts SET domain = lower(domain) WHERE domain IS NOT NULL AND domain != lower(domain)'
+    end
+  end
+
+  def down; end
+end

db/migrate/20230524194155_add_index_instances_on_reverse_domain.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AddIndexInstancesOnReverseDomain < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def change
+    add_index :instances, "reverse('.' || domain), domain", name: :index_instances_on_reverse_domain, algorithm: :concurrently
+  end
+end