FIX: SQLOLEDB Does Not Work with DBACCESSOR_OPTIMIZED Flag and SSPROP

SYMPTOMS

Using the Microsoft OLEDB Provider for SQL Server (SQLOLEDB) that comes with Microsoft Data Access Components (MDAC) version 2.6 or 2.6 SP1, when you set the value of the SSPROP_ENABLEFASTLOAD property to true in the SQLSERVERDATASOURCE property set, and then attempt to create an accessor with the DBACCESSOR_OPTIMIZED flag, the CreateAccessor() call returns DB_E_BADACCESSORFLAGS.

RESOLUTION

To resolve this problem, obtain the latest service pack for SQL Server 2000, the latest service pack for MDAC 2.6, or the hotfix referenced below. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

290211 INF: How to Obtain the Latest SQL Server 2000 Service Pack

For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

300635 INFO: How to Obtain the Latest MDAC 2.6 Service Pack

Hotfix

The English version of this fix should have the following file attributes or later:

Date         Time      Version         Size          File name     Platform
---------------------------------------------------------------------------
23-MAY-2001  18:16:00  2000.80.297.04  91,584 bytes  Sqloledb.dll  x86
23-MAY-2001  18:16:00  2000.80.297.06   1,440 bytes  Sqloledb.rll  x86

WORKAROUND

To work around this problem, do not set the SSPROP_ENABLEFASTLOAD flag to TRUE. If you need to set this flag to TRUE, you must install the fix.

MORE INFORMATION

To reproduce this behavior, copy the code below into a Microsoft Visual C++ console application, and then compile the code. Note that you may need to change the datasource name, user ID, and password.

#include <atldbcli.h>
#include <assert.h>
#define DBINITCONSTANTS 1
#include <sqloledb.h>

void main()
{
	HRESULT hr = CoInitialize( NULL );
	assert( SUCCEEDED(hr) );

	CDataSource ds;
	hr = ds.Open( _T("SQLOLEDB"), _T("server"), _T("user"), _T("password") );
	assert( SUCCEEDED(hr) );

	// Set the value of the SSPROP_ENABLEFASTLOAD property to true.

	CDBPropSet ps( DBPROPSET_SQLSERVERDATASOURCE );
	bool apret = ps.AddProperty( SSPROP_ENABLEFASTLOAD, true );
	CComPtr<IDBProperties> spProperties;
	hr = ds.m_spInit.QueryInterface( &spProperties );
	hr = spProperties->SetProperties( 1, &ps );

	CSession sess;
	hr = sess.Open( ds );

	DBID id;
	id.eKind = DBKIND_NAME;
	id.uName.pwszName = L"Pubs.dbo.authors";
	CComPtr<IRowsetFastLoad> pIFastLoad;
	hr = sess.m_spOpenRowset->OpenRowset( NULL, &id, NULL, IID_IAccessor, 0, NULL, (IUnknown **) &pIFastLoad );

	 DBBINDING binding = { 1, 0, 0, 0, NULL, NULL, NULL, DBPART_VALUE,
	   DBMEMOWNER_CLIENTOWNED, DBPARAMIO_NOTPARAM,100uL, 0, DBTYPE_STR,  0, 0 };
	HACCESSOR h;

	CComPtr<IAccessor> spAccessor;
	hr = pIFastLoad->QueryInterface(IID_IAccessor, (void **) &spAccessor);
        //You will get the error here.
	hr = spAccessor->CreateAccessor( DBACCESSOR_ROWDATA | DBACCESSOR_OPTIMIZED , 1,&binding,0,& h, NULL );
	AtlTraceErrorRecords(hr);
}