Merge branch '541120-prepare-namespace-id-and-id-index' into 'master'

Prepare (namespace_id, id) index on sent_notifications

See merge request !192636



Merged-by: Mario Celi <mcelicalderon@gitlab.com>
Approved-by: Krasimir Angelov <kangelov@gitlab.com>
Reviewed-by: Krasimir Angelov <kangelov@gitlab.com>
Reviewed-by: GitLab Duo <gitlab-duo@gitlab.com>

db/post_migrate/20250527093705_drop_namespace_id_only_index_from_sent_notifications.rb

+# frozen_string_literal: true
+
+class DropNamespaceIdOnlyIndexFromSentNotifications < Gitlab::Database::Migration[2.3]
+  INDEX_NAME = 'index_sent_notifications_on_namespace_id'
+
+  milestone '18.1'
+
+  def up
+    # Only created async in .com, no need to remove synchronously
+    prepare_async_index_removal :sent_notifications, :namespace_id, name: INDEX_NAME
+  end
+
+  def down
+    unprepare_async_index :sent_notifications, :namespace_id, name: INDEX_NAME
+  end
+end

db/post_migrate/20250527094327_prepare_async_index_sent_notifications_namespace_id_and_id.rb

+# frozen_string_literal: true
+
+class PrepareAsyncIndexSentNotificationsNamespaceIdAndId < Gitlab::Database::Migration[2.3]
+  INDEX_NAME = 'idx_sent_notifications_on_namespace_id_and_id'
+
+  milestone '18.1'
+
+  # TODO: Index to be created synchronously in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/192248
+  def up
+    prepare_async_index :sent_notifications, [:namespace_id, :id], name: INDEX_NAME # rubocop:disable Migration/PreventIndexCreation -- Necessary for sharding key
+  end
+
+  def down
+    unprepare_async_index :sent_notifications, [:namespace_id, :id], name: INDEX_NAME
+  end
+end

db/schema_migrations/20250527093705

+5f752aa1fab01ae485105f0bc61b9511511168b7cc7914ecf68ae4f28a8bdeeb
\ No newline at end of file

db/schema_migrations/20250527094327

+9ee6ff5125a6989598e95184dd5cfd509b458d2f7fed2e61256c2f3b9569e870
\ No newline at end of file