linux c++ mysql

          try
          {
            char sqlquery[800];
            sprintf(sqlquery,"insert into heltest values(0,'%s','%s','%s','%d','%d','%d','%d','%d','%d','%d','%d','%d','%s')",ppmac,Apmac,buff,int(RSSI),int(RSSIType),int(NoiseType),int(Noise),int(AssocFlag),int(RxChannel),int(TxChannel),int(Code),int(DataRate),Assocmac);
            std::cout<<sqlquery<<std::endl;
            conn->Execute(sqlquery);
          }
          catch(std::exception e)
          {
              char clearquery[200] = " truncate table originalsignalrecord";

              conn->Execute(clearquery);

          }