64-bit ODBC driver fails on SQLColAttribute call but not on SQLColAttributes call

Issue report by Ranja

Product

FileMaker Server

Version

13

Operating system version

Windows Server 2008R2 SP1

Description of the issue

In 64bit Windows, the SQLColAttribute ODBC function returns an error code -2, whereas the old SQLColAttributes function, which is now deprecated, returns 0 (success).

Steps to reproduce the problem

I wrote the following Win64 console application with MFC enabled. This code accesses a FileMaker database via FileMaker ODBC 64bit driver.

// ODBCTest.cpp : コンソール アプリケーションのエントリ ポイントを定義します。
//

#include "stdafx.h"
#include "ODBCTest.h"
#include "afxdb.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// 唯一のアプリケーション オブジェクトです。

CWinApp theApp;

using namespace std;

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
int nRetCode = 0;

HMODULE hModule = ::GetModuleHandle(NULL);

if (hModule != NULL)
{
// MFC を初期化して、エラーの場合は結果を印刷します。
if (!AfxWinInit(hModule, NULL, ::GetCommandLine(), 0))
{

_tprintf(_T("Fatal error: MFC の初期化ができませんでした。\n"));
nRetCode = 1;
}
else
{
{
CDatabase db;
if (db.OpenEx(_T("DRIVER={FileMaker ODBC};Database=TestODBC;Server=gaia;UID=admin;PWD=;"), CDatabase::noOdbcDialog))
{
_tprintf(_T("Opened\n"));

//実行
CRecordset rs(&db);
try{
rs.Open(CRecordset::forwardOnly, _T("SELECT Field2 FROM TestODBC WHERE Field1 = 4"));

CODBCFieldInfo fi;

short nFields = rs.GetODBCFieldCount();


if (!rs.IsEOF()) {
SWORD cbDescMax = 256;
LPWSTR p = new wchar_t[cbDescMax];

SQLSMALLINT cbDesc;
SQLLEN fDesc;
RETCODE r = ::SQLColAttributesW(rs.m_hstmt, 1, SQL_DESC_NAME, p, cbDescMax, &cbDesc, &fDesc);

if (r == 0){

_tprintf(_T("%s\n"), p);
}
else{

_tprintf(_T("Error=%d\n"), r);
}
r = ::SQLColAttributeW(rs.m_hstmt, 1, SQL_DESC_NAME, p, cbDescMax, &cbDesc, &fDesc);
if (r == 0){

_tprintf(_T("%s\n"), p);
}
else{

_tprintf(_T("Error=%d\n"), r);
}
delete[] p;

}


}
catch (...){}
rs.Close();
db.Close();
}
}
}
}
else
{
_tprintf(_T("Fatal error: GetModuleHandle failed.\n"));
nRetCode = 1;
}

return nRetCode;
}

When I run this code, the SQLColAttributesW call ends successfully but the SQLColAttributeW call fails with an error code -2.
This issue occurrs only in 64bit Windows environment.

Since Microsoft .NET Framework's ODBC layer now uses SQLColAttribute, this problem should be fixed as soon as possible.