You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20150108202057_create_bookmark_actions.rb
    path of file: ./repos/discourse/db/migrate
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class CreateBookmarkActions < 
    
  def up
    execute "INSERT INTO user_actions (action_type,
                                       user_id,
                                       target_topic_id,
                                       target_post_id,
                                       acting_user_id,
                                       created_at,
                                       updated_at)
             SELECT DISTINCT 3,
                    pa.user_id,
                    p.topic_id,
                    pa.post_id,
                    pa.user_id,
                    pa.created_at,
                    pa.updated_at
             FROM post_actions AS pa
             INNER JOIN posts AS p ON p.id = pa.post_id AND p.post_number = 1
             WHERE NOT EXISTS (SELECT 1 FROM user_actions AS ua WHERE ua.target_post_id = pa.post_id AND ua.action_type = 3 AND ua.user_id = pa.user_id)
             AND pa.post_action_type_id = 1
             AND pa.deleted_at IS NULL"
  end