Problem with getString() in OCCI

Question

/* <br>
My name is Chandra, <br>
I am facing a problem in retriving many records from a table using OCCI <br>
I am using VC6.0 in WindowXP - SP2 with Oracle 10G client <br>
<br>
Here is my Example <br>
I have no issue with the program when there are 10 records in emp table <br>
where as I am getting an error when there are 20 records. <br>
Code is executing till the end <br>
it also printed Finished Printing which is in main <br>
and gave the following error <br>
<br>
ERROR::: <br>
1.exe has encountered a problem and needs to close. <br>
we are sorry for the inconvenience <br>
Error Signature is saying that it happend with Mod Name ntdll.dll and <br>
ModVer: 5.1.2600.2180 and Offset:00010fc2 <br>
When I tried by modifying line <br>
emp1.ename     = rs->getString(1); <br>
to <br>
emp1[i].ename     = "Chandra"; <br>
it is working Perfectly <br>
Please advice what is wrong with getString(1); <br>
Is there any other function which I can use to store the value of ename into a string? <br>
If there is please advice me how to use. <br>
Thanks a lot for your support <br>
Regards, <br>
Chandra. <br>
*/ <br>
<b>
#include <iostream> <br>
#include <occi.h> <br>
#include <stdio.h> <br>
using     namespace oracle::occi; <br>
using     namespace std; <br>
int          numberofrecords; <br>
struct emp <br>
{ <br>
     string     ename; <br>
     int     age; <br>
     int     year; <br>
}emp1[50]; <br>
<br>
void empselect() <br>
{ <br>
     string     user = "scott"; <br>
     string     pass = "tiger"; <br>
     string     osid = ""; <br>
     Environment* env = Environment::createEnvironment(Environment::DEFAULT); <br>
     printf("Environment is Set \n"); <br>
     int ret = 0; <br>
     int i=1; <br>
     try <br>
     { <br>
          printf("Creating the Connection\n"); <br>
          Connection *con = env->createConnection(user, pass, osid); <br>
          printf("\n"); <br>
          cout << "Connection Established - Connected as " << user << "/" << osid << "." << endl; <br>
          cout << "Creating Statement" << endl; <br>
          Statement stmt     = con->createStatement("select from emp"); <br>
          cout << "Executing Query" << endl; <br>
          ResultSet *rs     = stmt->executeQuery(); <br>
          while (rs->next()) <br>
          { <br>
               emp1[i].ename     = rs->getString(1); <br>
               emp1[i].age     = rs->getNumber(2); <br>
               emp1[i].year     = rs->getNumber(3); <br>
               i++; <br>
          } <br>
          numberofrecords = i; <br>
          printf("Out of while loop \n"); <br>
          stmt->closeResultSet(rs); <br>
          cout << "Closing connection." << endl; <br>
          env->terminateConnection(con); <br>
     } <br>
     catch (SQLException ea) <br>
     { <br>
          cout <<"Inside Exception - OBULA\n"; <br>
          cerr << "Can’t connect: " << ea.what(); <br>
          ret = 1; <br>
     } <br>
     cout << "Before Termination" << endl; <br>
     Environment::terminateEnvironment(env); <br>
     cout <<"Terminated \n"; <br>
} <br>
<br>
void main() <br>
{ <br>
     int j; <br>
     cout << "Calling justlasd \n"; <br>
     empselect(); <br>
     cout<<"Priniting Results\n"; <br>
     for(j=0;j<numberofrecords;j++) <br>
          cout << "emp - "<< emp1[j].ename << "\tage - "<< emp1[j].age << "\t - " << emp1[j].year << endl; <br>
     cout <<"Finished printing"; <br>
}</b>

Answer 1

Hey guys try dis code........i too had the same problem soo i hav solved tht in dis way.....
#ifndef DllExport
#define DllExport     __declspec( dllexport )
#endif
#include <iostream.h>
#include <occi.h>
using namespace oracle::occi;
using namespace std;
typedef struct DllExport MultisiteTableRecord
unsigned int ReqID; //will point to table 1
} MultisiteTableRecord;
typedef OCCI_STD_NAMESPACE::vector<string> cols;
typedef struct DllExport RowType : public MultisiteTableRecord
     int id;
string name;
} RowList;
enum
ID = 1,
NAME,
class demo{
public:
Environment* env ;     
     Connection* conn;
     Statement* stmt;
     ResultSet *rs;
     list<RowList> row1;
int main( )
     demo *d = new demo;
     try{          
          d->env = Environment::createEnvironment(Environment::OBJECT);          
          d->conn = d->env->createConnection( "infodba", "infodba","tceng" );          
          cout << "Environment and Connection created" << endl;     
          string sqlQuery = "SELECT id,name FROM demo ";          
          d->stmt = d->conn->createStatement(sqlQuery);
          d->rs = d->stmt->executeQuery ();
          int row =1 ;
          ResultSet::Status status;
          while((status = d->rs->next()) == (ResultSet::DATA_AVAILABLE))
               RowList r;
               r.id = d->rs->getInt(ID);
               r.name = d->rs->getString(2);
               d->row1.push_back(r);
          list<RowList>::iterator i;
          for (i = d->row1.begin(); i != d->row1.end(); i++){
                    cout<<i->name.c_str()<<endl;
                    cout<<i->id<<endl;
cout << "we" ;
          d->stmt->closeResultSet(d->rs);//to free resources
     d->conn->terminateStatement(d->stmt);
     d->env->terminateConnection(d->conn);
     Environment::terminateEnvironment(d->env);
          cout << "Closing connection." << endl;
     catch(int error){
cout << "hi" ;
          cout << error;
          return 0;
}