docs: protected void executeQueryPrologue(boolean isBatch) throws SQLException {
      executing = true;
      if (closed) {
        throw new SQLException("execute() is called on closed statement");
      }
      protocol.prolog(maxRows, protocol.getProxy() != null, connection, this);
      if (queryTimeout != 0 && (!canUseServerTimeout || isBatch)) {
        setTimerTask(isBatch);
      }
    }