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: 20140930144910_migrate_bank_code_to_banks.rb
    path of file: ./repos/catarse/db/migrate
    
    the code of the file until where you have to start completion: class MigrateBankCodeToBanks
    
  def up
    execute <<-SQL
      update bank_accounts SET bank_id = (select b.id from banks b where split_part(bank_accounts.name, ' ', 1) = b.code);
      ALTER TABLE bank_accounts ALTER COLUMN bank_id SET NOT NULL;
    SQL
    remove_column :bank_accounts, :name
  end