First query always return empty result

[wustrong]

The code like this：

  var proxy = getConnection(xxxx);
  var result;
  
  result = await proxy.query('select * from t_employee where id = 1');
  trpc.logger.info('after query: $result');
  
  result = await proxy.query('select * from t_employee where id = ?', [2]);
  trpc.logger.info('after query: $result');

The result like this:

  // result print of first query
  trpc-dart - 2021-10-03 20:29:13.791456 - info - query: select * from t_employee where id = 1, args: [], result: ()；
  trpc-dart - 2021-10-03 20:29:13.810355 - info - query: select * from t_employee where id = ?, args: [2], result: (Fields: {id: 2, name: Tom, dept_id: 1, salary: 999.0})；
  
  // result print of second query
  trpc-dart - 2021-10-03 20:29:19.250444 - info - query: select * from t_employee where id = 1, args: [], result: (Fields: {id: 1, name: David, dept_id: 1, salary: 999.0})；
  trpc-dart - 2021-10-03 20:29:19.253210 - info - query: select * from t_employee where id = ?, args: [2], result: (Fields: {id: 2, name: Tom, dept_id: 1, salary: 999.0})；

[wustrong]

https://github.com/adamlofts/mysql1_dart/issues/88#issuecomment-894639665 this is a bug but solved