Dynamic SQL Stored Procedure call in Pro*C Application

Question

Hello All
Could you help with a sample Pro*C program (or snippet) which has a dynamic call to a stored procedure? The procedure to be called is determined at run time and so also the number of parameters to it.
Is this even possible using Pro*C?
Thanks in Advance
RD

Answer 1

Hi Colin & Faust
We found sample pro*c programs for dynamically calling PL/SQL blocks but not for dynamically calling stored procedures.
Heres the program we compiled successfully but it doesnt work, it gives a core dump on execution. Could you point out whats wrong.
#include<stdio.h>
#include<iostream>
#include<fstream>
#include<stdlib.h>
#include<sqlca.h>
#include<string>
#include<sys/types.h>
#include<sys/ipc.h>
#include<sys/msg.h>
#include<thread.h>
#include<sqlda.h>
#include<sqlcpr.h>
using namespace std;
#define TRUE 1
int main()
EXEC SQL BEGIN DECLARE SECTION;
char *UserID = getenv( "DATABASE" );
char query[100];
EXEC SQL END DECLARE SECTION;
SQLDA *bind_des;
EXEC SQL CONNECT :UserID;
EXEC SQL WHENEVER SQLERROR CONTINUE;
bind_des = SQLSQLDAAlloc( 0, 2, (size_t)10, (size_t)0 );
bind_des->N = 2;
strcpy( query, "CALL sel_dept( :empno,:name );");
//Calling stored procedure sel_dept( no NUMBER IN, name VARCHAR2 OUT)
EXEC SQL PREPARE sql_stmt from :query;
EXEC SQL DESCRIBE BIND VARIABLES FOR sql_stmt INTO bind_des;
bind_des->N = bind_des->F;
//cout << " bind_des->N after assigment = " << bind_des->N;
//--------------------- Enter the Input values -----------------------------
//parameter :1
bind_des->L[0] = 4;
/* Allocate storage for value and null terminator. */
bind_des->V[0] = (char *) malloc(bind_des->L[0] + 1);
/* Store value in bind descriptor. */
strcpy(bind_des->V[0], "50");
/* Set datatype to STRING. */
bind_des->T[0] = 2;
//parameter :2
bind_des->L[1] = 20;
/* Allocate storage for value and null terminator. */
bind_des->V[1] = (char *) malloc(bind_des->L[1] + 1);
/* Store value in bind descriptor. */
strcpy(bind_des->V[1], "");
/* Set datatype to STRING. */
bind_des->T[1] = 5;
EXEC SQL EXECUTE sql_stmt;
//cout<<"name"<<"\t"<bind_des->V[0]<<"\t"<<bind_des->V[1]<<endl;
cout << "name"<<"\t";
cout << "bind_des->V[0]=" << bind_des->V[0]<<"\t";
cout << "bind_des->V[1]=" << bind_des->V[1]<<"\t"<<endl;
for (int i = 0; i < bind_des->F; i++) /* for bind descriptor */
free(bind_des->V);
free(bind_des->I[i]);
SQLSQLDAFree(0, bind_des);
EXEC SQL COMMIT;
return 0;