discourse/db/migrate/20150617234511_add_staff_index_to_users.rb

class AddStaffIndexToUsers < ActiveRecord::Migration
  def change
    add_index :users, [:id], name: 'idx_users_admin', where: 'admin'
    add_index :users, [:id], name: 'idx_users_moderator', where: 'moderator'
  end
end
PERF: deleting a post in huge topics was timing out - add missing index to user actions for fast retrieval by post - add missing indexes to users for fast retrieval of staff - only refresh topic_users liked/bookmarked cache for affected users 2015-06-18 07:58:32 +08:00			`class AddStaffIndexToUsers < ActiveRecord::Migration`
			`def change`
			`add_index :users, [:id], name: 'idx_users_admin', where: 'admin'`
			`add_index :users, [:id], name: 'idx_users_moderator', where: 'moderator'`
			`end`
			`end`