OCIObjectSetAttr() and UTF16 environnement

Question

Hi,
I'm currently implementing Oracle Named Types support (SQL_NTY) in OCILIB library and i'm facing a weird problem !
To manipulate objects attributes, i'm using OCIObjectSetAttr() and OCIObjectGetAttr().
Everything's fine when the environnement handle is created in normal ANSI mode.
But when it's created with OCI_UTF16 flags to setup an unicode environnement, troubles start !
In an UTF16 env, calls to OCIObjectSetAttr() and OCIObjectGetAttr() do not return any error but any call to OCIObjectSetAttr() will smash up all other handles retreived before with OCIObjectGetAttr().
By example, for an object that has 2 fields (let's say int and timestamp), if i retreive the timestamp handle and set the int value :
* in ansi, no problem
* in unicode, the timestamp handle is scrambled and any use of it with function that get an timstamp handle then crash !
If the object is created without having his attributes modified, it's well inserted throught a SQL statement.
THe problem seems to be OCIObjectSetAttr (). All handles retrieved before the OCIObjectSetAttr() are ok and when OCIObjectSetAttr() returns for other fields, theses handles are scrambled !
I checked client 9, 10, 11 and i got the same : ok in ansi and handle smash up in unicode !
Any ideas ? Posting some code is quit difficult because it's using internal library calls . But if anybody wants to review it, i'll send it straight away !
I checks all strings involded in the specified portions of code but everyting looks regular...
There hardly no resources on OCIObjectSetAttr() and i couldn't find anything about its use in an UT16 env.
Thanks in advance for reading thoses lines...
Vincent.

Answer 1

Hi Jonah,
I can't recompile a full OCILIB package on Linux now, but i made a test project with raw OCI code and it gives the same result : values are smashed up !
(BTW : how do you highlight C syntax in posts ?)
Here is the test code, First create the test type :
SQL> create type type_test as object (v1 int, v2 date);
Here the test raw OCI code :
With GCC on linux, add -fshort-wchar to compile it !
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "oci.h"
#include "orid.h"
#define OCI_TEST_UNICODE
#ifdef OCI_TEST_UNICODE
#include "wchar.h"
#define ENV_MODE OCI_UTF16
#define CHARSIZE sizeof(wchar_t)
#define TS(x) L ## x
#define tchar wchar_t
#else
#define ENV_MODE OCI_DEFAULT
#define CHARSIZE sizeof(char)
#define TS(x) x
#define tchar char
#endif
int tslen(tchar *s)
int n =0;
while (*s++) n++;
return n;
#define tsize(x) (tslen(x) * sizeof(tchar))
int main(int argc, char **argv)
/* OCI handles */
OCIEnv *p_env    = NULL;
OCIError *p_err  = NULL;
OCISvcCtx *p_svc = NULL;
/* OCI types */
OCIType *dto     = NULL ;
OCINumber *p_num = NULL;
void *obj        = NULL;
/* misc*/
OCIInd ind = 0;
int value = 1;
int rc = OCI_SUCCESS;
/* OCI values placeholders */
OCIDate *date;
OCINumber num;
/* attributes infos types */
tchar* attr1_name[1] = {TS("V1")};
ub4 attr1_len[1] = {2*CHARSIZE};
tchar* attr2_name[1] = {TS("V2")};
ub4 attr2_len[1] = {2*CHARSIZE};
tchar *user = TS("winrest");
tchar *pwd  = TS("fsi");
tchar *db   = TS("maison");
tchar *type = TS("TYPE_TEST");
/* Initialize OCI */
rc = OCIEnvCreate((OCIEnv **) &p_env,
ENV_MODE | OCI_THREADED | OCI_OBJECT,
NULL, NULL, NULL, NULL, 0, NULL);
/* 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,
(const OraText *) user, tsize(user),
(const OraText *) pwd, tsize(pwd),
(const OraText *) db, tsize(db));
if (rc)
printf("connection error !");
return 0;
printf("connected...\n");
/* get type info */
rc = OCITypeByName(p_env, p_err, p_svc, (CONST text *) NULL, (ub4) 0,
(CONST text *) type, tsize(type), (CONST text *) NULL, (ub4) 0,
OCI_DURATION_SESSION, OCI_TYPEGET_ALL, &dto);
/* create object */
rc = OCIObjectNew(p_env, p_err, p_svc, SQLT_NTY, dto, NULL, OCI_DURATION_SESSION,
TRUE, (dvoid **) &obj);
/* get date value */
rc = OCIObjectGetAttr(p_env, p_err, obj, NULL, dto,
(CONST text**) attr2_name, attr2_len,
1, NULL, 0, &ind, NULL, (void **) &date, NULL);
/* set date value */
OCIDateSysDate(p_err, date);
/* print date value */
printf("date before setting int val : %02i/%02i/%04i\n", date->OCIDateDD,
date->OCIDateMM, date->OCIDateYYYY);
/* set int value */
rc = OCINumberFromInt(p_err, &value, sizeof(int), OCI_NUMBER_SIGNED, &num);
ind = 0;
rc = OCIObjectSetAttr(p_env, p_err, obj, NULL, dto,
(CONST text**) attr1_name, attr1_len,
1, NULL, 0, ind, NULL, &num);
/* get it back for checking */
value = 0;
rc = OCIObjectGetAttr(p_env, p_err, obj, NULL, dto,
(CONST text**) attr1_name, attr1_len,
1, NULL, 0, &ind, NULL, (void **) &p_num, NULL);
rc = OCINumberToInt(p_err, p_num, sizeof(int), OCI_NUMBER_SIGNED, &value);
/* print int value */
printf("int value : %i\n", value);
/* print date value */
printf("date after setting int val : %02i/%02i/%04i\n", date->OCIDateDD,
date->OCIDateMM, date->OCIDateYYYY);
/* free object */
rc = OCIObjectFree(p_env, p_err, obj, 0);
/* Disconnect */
rc = OCILogoff(p_svc, p_err);
/* Free handles */
rc = OCIHandleFree((dvoid *) p_svc, OCI_HTYPE_SVCCTX);
rc = OCIHandleFree((dvoid *) p_err, OCI_HTYPE_ERROR);
rc = OCIHandleFree((dvoid *) p_env, OCI_HTYPE_ENV);
return 1;
if OCI_TEST_UNICODE is not defined, i get that (working) :
date before setting int val : 03/02/2008
int value : 1
date after setting int val : 03/02/2008
And if it's defined (smashed values):
date before setting int val : 03/02/2008
int value : 1
date after setting int val : 204/02/-16126
Message was edited by:
Vicenzo : modified declaration of CHARSIZE
Message was edited by:
Vicenzo : Fixed code to compile on Linux