Some Out-Variables are not filled when one is missing (Oracle-Client 10)

Question

Hello everybody,
we have a problem in our applications, written in C++ using OCI.
All works fine with Oracle Client 8 and 9, the problem occurs when using Client 10.
A simple example:
select 1, 2, 3, 4, 5 from dual;
I have 4 out-variables, the 3rd one is missing:
OCIDefineByPos(..., 1, &out1, ...);
OCIDefineByPos(..., 2, &out2, ...);
OCIDefineByPos(..., 4, &out4, ...);
OCIDefineByPos(..., 5, &out5, ...);
When executing with Oracle Client 8 and 9, the result is:
out1 = 1
out2 = 2
out4 = 4
out5 = 5
Executing the same with Oracle Client 10, the result is:
out1 = 1
out2 = 2
out4 = 0
out5 = 0
When there is a selected column without a variable for it, all following out-variables are not filled. Can someone repeat and / or explain this? I read the Oracle Docs for the OCI 10, but nowhere is a hint about differences or changes in this behaviour. I know that when selecting a column I should spend an out-variable for it, but nobody is perfect.
Here are some details:
Oracle Client 10.2.0.1.0
Client OS Windows XP SP1
Oracle Database 10g Release 10.2.0.1.0
Application developed with Visual Studio C++ 7.1
Thanks for any help.
Torsten
Here's the code, I changed the simple OCI-example from the Oracle homepage:
void ocitest()
static text username = (text ) "xxx";
static text password = (text ) "yyy";
static OCIEnv *envhp;
static OCIError *errhp;
static sword status;
sword out1, out2, out3, out4, out5;
sb2 ind1, ind2, ind3, ind4, ind5; /* indicator */
static text maxemp = (text ) "SELECT 1, 2, 3, 4, 5 FROM dual ";
OCISession authp = (OCISession ) 0;
OCIServer *srvhp;
OCISvcCtx *svchp;
OCIStmt stmthp, stmthp1;
OCIDefine defnp1 = (OCIDefine ) 0;
OCIDefine defnp2 = (OCIDefine ) 0;
OCIDefine defnp3 = (OCIDefine ) 0;
OCIDefine defnp4 = (OCIDefine ) 0;
OCIDefine defnp5 = (OCIDefine ) 0;
(void) OCIInitialize((ub4) OCI_DEFAULT, (dvoid *)0,
(dvoid * (*)(dvoid *, size_t)) 0,
(dvoid * (*)(dvoid *, dvoid *, size_t))0,
(void (*)(dvoid *, dvoid *)) 0 );
(void) OCIEnvInit( (OCIEnv **) &envhp, OCI_DEFAULT, (size_t) 0,
(dvoid **) 0 );
(void) OCIHandleAlloc( (dvoid *) envhp, (dvoid **) &errhp, OCI_HTYPE_ERROR,
(size_t) 0, (dvoid **) 0);
/* server contexts */
(void) OCIHandleAlloc( (dvoid *) envhp, (dvoid **) &srvhp, OCI_HTYPE_SERVER,
(size_t) 0, (dvoid **) 0);
(void) OCIHandleAlloc( (dvoid *) envhp, (dvoid **) &svchp, OCI_HTYPE_SVCCTX,
(size_t) 0, (dvoid **) 0);
(void) OCIServerAttach( srvhp, errhp, (text *)"", strlen(""), 0);
/* set attribute server context in the service context */
(void) OCIAttrSet( (dvoid *) svchp, OCI_HTYPE_SVCCTX, (dvoid *)srvhp,
(ub4) 0, OCI_ATTR_SERVER, (OCIError *) errhp);
(void) OCIHandleAlloc((dvoid *) envhp, (dvoid **)&authp,
(ub4) OCI_HTYPE_SESSION, (size_t) 0, (dvoid **) 0);
(void) OCIAttrSet((dvoid *) authp, (ub4) OCI_HTYPE_SESSION,
(dvoid *) username, (ub4) strlen((char *)username),
(ub4) OCI_ATTR_USERNAME, errhp);
(void) OCIAttrSet((dvoid *) authp, (ub4) OCI_HTYPE_SESSION,
(dvoid *) password, (ub4) strlen((char *)password),
(ub4) OCI_ATTR_PASSWORD, errhp);
checkerr(errhp, OCISessionBegin ( svchp, errhp, authp, OCI_CRED_RDBMS,
(ub4) OCI_DEFAULT));
(void) OCIAttrSet((dvoid *) svchp, (ub4) OCI_HTYPE_SVCCTX,
(dvoid *) authp, (ub4) 0,
(ub4) OCI_ATTR_SESSION, errhp);
checkerr(errhp, OCIHandleAlloc( (dvoid *) envhp, (dvoid **) &stmthp,
OCI_HTYPE_STMT, (size_t) 0, (dvoid **) 0));
checkerr(errhp, OCIHandleAlloc( (dvoid *) envhp, (dvoid **) &stmthp1,
OCI_HTYPE_STMT, (size_t) 0, (dvoid **) 0));
checkerr(errhp, OCIStmtPrepare(stmthp, errhp, maxemp,
(ub4) strlen((char *) maxemp),
(ub4) OCI_NTV_SYNTAX, (ub4) OCI_DEFAULT));
checkerr(errhp, OCIDefineByPos(stmthp, &defnp1, errhp, 1, (dvoid *) &out1,
(sword) sizeof(sword), SQLT_INT, (dvoid *) &ind1, (ub2 *)0,
(ub2 *)0, OCI_DEFAULT));
checkerr(errhp, OCIDefineByPos(stmthp, &defnp2, errhp, 2, (dvoid *) &out2,
(sword) sizeof(sword), SQLT_INT, (dvoid *) &ind2, (ub2 *)0,
(ub2 *)0, OCI_DEFAULT));
/* checkerr(errhp, OCIDefineByPos(stmthp, &defnp3, errhp, 3, (dvoid *) &out3,
(sword) sizeof(sword), SQLT_INT, (dvoid *) &ind3, (ub2 *)0,
(ub2 *)0, OCI_DEFAULT));*/
checkerr(errhp, OCIDefineByPos(stmthp, &defnp4, errhp, 4, (dvoid *) &out4,
(sword) sizeof(sword), SQLT_INT, (dvoid *) &ind4, (ub2 *)0,
(ub2 *)0, OCI_DEFAULT));
checkerr(errhp, OCIDefineByPos(stmthp, &defnp5, errhp, 5, (dvoid *) &out5,
(sword) sizeof(sword), SQLT_INT, (dvoid *) &ind5, (ub2 *)0,
(ub2 *)0, OCI_DEFAULT));
/* execute and fetch */
if (status = OCIStmtExecute(svchp, stmthp, errhp, (ub4) 1, (ub4) 0,
(CONST OCISnapshot *) NULL, (OCISnapshot *) NULL, OCI_DEFAULT))
if (status == OCI_NO_DATA)
else
checkerr(errhp, status);
void checkerr(OCIError *errhp, sword status)
text errbuf[512];
sb4 errcode = 0;
switch (status)
case OCI_SUCCESS:
break;
case OCI_SUCCESS_WITH_INFO:
(void) printf("Error - OCI_SUCCESS_WITH_INFO\n");
break;
case OCI_NEED_DATA:
(void) printf("Error - OCI_NEED_DATA\n");
break;
case OCI_NO_DATA:
(void) printf("Error - OCI_NODATA\n");
break;
case OCI_ERROR:
(void) OCIErrorGet((dvoid *)errhp, (ub4) 1, (text *) NULL, &errcode,
errbuf, (ub4) sizeof(errbuf), OCI_HTYPE_ERROR);
(void) printf("Error - %.*s\n", 512, errbuf);
break;
case OCI_INVALID_HANDLE:
(void) printf("Error - OCI_INVALID_HANDLE\n");
break;
case OCI_STILL_EXECUTING:
(void) printf("Error - OCI_STILL_EXECUTE\n");
break;
case OCI_CONTINUE:
(void) printf("Error - OCI_CONTINUE\n");
break;
default:
break;
}

Answer 1

Use int/long instead sword .