C++, do not connect then succeeds to express the database

I'm not sure this is the right forum but as it says Visual Studio and that my program is C++, I hope I'm not offending person.
The following code fails to connect to the database, even if when using Express database I managed to log very well.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <oci.h>

// #pragma comment(lib, "d:\\orant\\oci80\\lib\\msvc\\ora803.lib")

static OCIEnv           *p_env;
static OCIError         *p_err;
static OCISvcCtx        *p_svc;
static OCIStmt          *p_sql;
static OCIDefine        *p_dfn    = (OCIDefine *) 0;
static OCIBind          *p_bnd    = (OCIBind *) 0;

void main()
{
   int             p_bvi;
   char            p_sli[20];
   int             rc;
   char            errbuf[100];
   int             errcode;

   rc = OCIInitialize((ub4) OCI_DEFAULT, (dvoid *)0,  /* Initialize OCI */
           (dvoid * (*)(dvoid *, size_t)) 0,
           (dvoid * (*)(dvoid *, dvoid *, size_t))0,
           (void (*)(dvoid *, dvoid *)) 0 );

   /* Initialize evironment */
   rc = OCIEnvInit( (OCIEnv **) &p_env, OCI_DEFAULT, (size_t) 0, (dvoid **) 0 );

   /* Initialize handles */
   rc = OCIHandleAlloc( (dvoid *) p_env, (dvoid **) &p_err, OCI_HTYPE_ERROR,
           (size_t) 0, (dvoid **) 0);
   rc = OCIHandleAlloc( (dvoid *) p_env, (dvoid **) &p_svc, OCI_HTYPE_SVCCTX,
           (size_t) 0, (dvoid **) 0);

   /* Connect to database server */
   rc = OCILogon(p_env, p_err, &p_svc, "BIG", 5, "BIG", 5, "S6S", 8);
   if (rc != 0) {
      OCIErrorGet((dvoid *)p_err, (ub4) 1, (text *) NULL, &errcode, errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR);
      printf("Error - %.*s\n", 512, errbuf);
      exit(8);
   }
.......snip.......
errbuf contains 0x0012ff00 ' ORA-01017: username/password invalid name: connection refused ".

Please tell me what I did wrong?

Hello

This forum is made for the Oracle Developer Tools for Visual Studio, which is part of the family of Oracle products .NET. The forum of the OIC is above this way:

Oracle Call Interface (OCI)

However, I don't think anyone will be too offended.

A quick glance at your code, I see you have hardcoded the values for the parameters uname_len, passwd_len and dbname_len and the transmitted value is greater than the actual length of the parameters that you provide.

I would like to change this:

rc = OCILogon(p_env, p_err, &p_svc, "BIG", 5, "BIG", 5, "S6S", 8);

to do this:

rc = OCILogon(p_env, p_err, &p_svc, "BIG", 3, "BIG", 3, "S6S", 3);

Of course, I guess that hard coding is there just for a test, etc.

Kind regards

Mark

Tags: Database

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