表达res.send为多次调用返回相同的结果

Question

我有一条路线，我想为每项服务执行不同的功能

var planning = require('../tms/planning.js');
router.get('/tms/api/:service', isAuthenticated, function(req, res, next) {

  if (req.params.service == 'depot_planning') {
    planning.depots(req, function(results) {
      res.send({
        'result': {
          'data': results
        }
      });
    });

  } else if (req.params.service == 'affiche_planning') {
    planning.AffichePlanning(req, function(result) {
      res.send({
        'result': {
          'data': result
        }
      });
    });
  }

});

我打电话的功能

var t = require('./DB2connexion');

var database = t.database;

var depots = function(req, callback) {
  statement = 'SELECT distinct plptrs FROM MTFPLAP';
  database.execute(statement);
  database.on('execute', function(error, results, next) {
    if (error) {
      console.log(error);
    } else {
      callback(results, next);
    }
  });

}
var AffichePlanning = function(req, callback) {

  statement = 'SELECT otnump,otquai,OTHCR,Otnbps from MTFodtp  where  OTDCR=\'' + req.query.datePlanning +
    '\' and ottype=\'CDE\' and OTLP=\'NOR\' order by otquai asc,OTHCR asc';
  console.log(statement);
  database.execute(statement);
  database.on('execute', function(error, results) {
    if (error) {
      console.log(error);
    } else {
      callback(results, next);
    }
  });

}

module.exports.depots = depots;
module.exports.AffichePlanning = AffichePlanning;

当我执行我的代码时，我为两条路线返回了相同的结果，我怎样才能为每次调用取得好结果？