message: fix(gconsole): catch query exception.
diff: @@ -1460,7 +1460,13 @@ int raw_sparql_handler(string query)
  // export_flag = true;
  // }
  long tv_begin = Util::get_cur_time();
  - int ret = current_database->query(query, _rs, ofp, true, export_flag, nullptr);
  + int ret;
  + try {
  + ret = current_database->query(query, _rs, ofp, true, export_flag, nullptr);
  + } catch (const std::exception &e) {
  + cout << "Exception: " << e.what() << endl;
  + return -1;
  + }
  current_database->save();
  if ((ret <= -100 && ret != -100) || (ret > -100 && ret < 0)) // select query failed or update query failed
  {
  