code: func PgXlogReplayPause(db XODB) error {
  	var err error
  
  	// sql query
  	const sqlstr = `SELECT pg_catalog.pg_xlog_replay_pause()`
  
  	// run query
  	XOLog(sqlstr)
  	_, err = db.Exec(sqlstr)
  	return err
  }
docs: // PgXlogReplayPause calls the stored procedure 'pg_catalog.pg_xlog_replay_pause() void' on db.