discourse/db/migrate/20150514023016_add_unread_notifications_index.rb

# frozen_string_literal: true

class AddUnreadNotificationsIndex < ActiveRecord::Migration[4.2]
  def change
    add_index :notifications,
              %i[user_id notification_type],
              where: "not read",
              name: "idx_notifications_speedup_unread_count"
  end
end