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: 20130203104818_create_jobs.rb
    path of file: ./repos/arvados/services/api/db/migrate
    
    the code of the file until where you have to start completion: # Copyright (C) The Arvados Authors. All ri
    
  def change
    create_table :jobs do |t|
      t.string :uuid
      t.string :owner
      t.string :modified_by_client
      t.string :modified_by_user
      t.datetime :modified_at
      t.string :submit_id
      t.string :command
      t.string :command_version
      t.text :command_parameters
      t.string :cancelled_by_client
      t.string :cancelled_by_user
      t.datetime :cancelled_at
      t.datetime :started_at
      t.datetime :finished_at
      t.boolean :running
      t.boolean :success
      t.string :output

      t.timestamps
    end
    add_index :jobs, :uuid, :unique => true
    add_index :jobs, :submit_id, :unique => true
    add_index :jobs, :command
    add_index :jobs, :finished_at
    add_index :jobs, :started_at
    add_index :jobs, :output
  end