fixed memory leak in database, fixed wrong carid in races, some updates

database.cpp

@@ -13,10 +13,32 @@ DataBase::DataBase()
     this->db->setDatabaseName("Renndatenbank.sqlite");
     std::cout << "Konstruktor Database" << std::endl;
 }
+vector< vector<QString> > DataBase::getData2(std::string statement, int cols){
+
+    vector<QString> data;
+    vector< vector<QString> > lines;
+    bool ok = this->db->open();
+    QString qstr;
+    if(ok){
+        QSqlQuery query;
+        query.exec(QString::fromStdString(statement));
+        while(query.next()){
+
+            for(int i = 0; i < cols; i++){
+                qstr = query.value(i).toString();
+                data.push_back(qstr);
+            }
+            lines.push_back(data);
+            data.erase(data.begin(), data.begin()+cols);
+        }
+    }
+    this->db->close();
+    return lines;
+}
 
 vector< vector<QString> > DataBase::getData(std::string statement, int cols){
 
-    char * buffer = new char[statement.length()-1];
+    char * buffer = new char[statement.length()+1];
     strcpy(buffer,statement.c_str());
     vector<QString> data;
     vector< vector<QString> > lines;
@@ -36,11 +58,12 @@ vector< vector<QString> > DataBase::getData(std::string statement, int cols){
         }
     }
     this->db->close();
+    delete[] buffer;
     return lines;
 }
 
 void DataBase::setData(std::string statement){
-    char * buffer = new char[statement.length()];
+    char * buffer = new char[statement.length()+1];
     strcpy(buffer,statement.c_str());
     bool ok = this->db->open();
     if(ok){