code: func MustExec(e Execer, query string, args ...interface{}) sql.Result {
  	res, err := e.Exec(query, args...)
  	if err != nil {
  		panic(err)
  	}
  	return res
  }
docs: // MustExec execs the query using e and panics if there was an error.
  // Any placeholder parameters are replaced with supplied args.