module ActiveRecord::ConnectionAdapters::MySQL::DatabaseStatements

def with_multi_statements
  multi_statements_was = multi_statements_enabled?
  unless multi_statements_was
    @connection.set_server_option(Mysql2::Client::OPTION_MULTI_STATEMENTS_ON)
  end
  yield
ensure
  unless multi_statements_was
    @connection.set_server_option(Mysql2::Client::OPTION_MULTI_STATEMENTS_OFF)
  end
end