Enviar datos a una columna FILESTREAM mediante IRowsetFastUpload SQL Server Native Client (OLE DB)

Se aplica a: síSQL Server (todas las versiones admitidas) SíAzure SQL Database SíInstancia administrada de Azure SQL síAzure Synapse Analytics síAlmacenamiento de datos paralelos

En este ejemplo se utiliza la interfaz IRowsetFastUpload para enviar entre 4MB y 4GB de datos a una columna FILESTREAM.

Para obtener más información sobre la característica filestream, vea Compatibilidad con FILESTREAM (OLE DB).

Ejemplo

Antes de compilar y ejecutar este ejemplo, habilite la compatibilidad con FILESTREAM (Habilitar y configurar FILESTREAM).

Asegúrese de que la variable de entorno INCLUDE incluye el directorio que contiene sqlncli.h.

El servidor debe tener un directorio denominado C:\DBFsa, donde el ejemplo creará la base de datos. Su instancia de SQL Server debe tener acceso de escritura a esta ubicación (por ejemplo, iniciar sesión como una cuenta de sistema local).

Copie la primera lista de código y péguela en un archivo denominado ISSHelper.h.

Copie la segunda lista de código y péguela en un archivo denominado ISSHelper.cpp.

Copie la tercera lista de código y péguela en un archivo denominado IRowsetFastLoadUpload.cpp.

Compile IRowsetFastLoadUpload.cpp, ISSHelper.cpp, ole32.lib y oleaut32.lib.

Cuando ejecute este ejemplo, debe pasar el nombre de un servidor o un servidor\nombreDeInstancia, así como un valor comprendido entre 4 MB (0x400001) y 4 GB (0xFFFFFFFF) que indique la cantidad de datos que se van a escribir.

La cuarta lista de código (Transact-SQL) elimina la base de datos creada en este ejemplo.

// ISSHelper.h: interface for the CISSHelper class.  
#if !defined(AFX_ISSHELPER_H__7B88E5F3_263F_11D2_9D1F_00C04F96B8B2__INCLUDED_)  
#define AFX_ISSHELPER_H__7B88E5F3_263F_11D2_9D1F_00C04F96B8B2__INCLUDED_  
  
#if _MSC_VER > 1000  
#pragma once  
#endif // _MSC_VER > 1000  
  
class CISSHelper : public ISequentialStream {  
public:  
   // Constructor/destructor.  
   CISSHelper(__int64 i64LobBytes);  
   virtual ~CISSHelper();  
  
   // Helper function to clean up memory.  
   virtual void Clear();  
  
   // ISequentialStream interface implementation.  
   STDMETHODIMP_(ULONG)AddRef(void);  
   STDMETHODIMP_(ULONG)Release(void);  
   STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppv);  
   STDMETHODIMP Read(   
      /* [out] */ void __RPC_FAR *pv,  
      /* [in] */ ULONG cb,  
      /* [out] */ ULONG __RPC_FAR *pcbRead);  
   STDMETHODIMP Write(   
      /* [in] */ const void __RPC_FAR *pv,  
      /* [in] */ ULONG cb,  
      /* [out] */ ULONG __RPC_FAR *pcbWritten);  
  
public:  
   void * m_pBuffer;   // Buffer  
   ULONG m_ulLength;   // Total buffer size.  
   ULONG m_ulStatus;   // Column status.  
  
   __int64 m_i64BytesUploaded;  
   __int64 m_i64LastPrintUploaded;  
   __int64 m_i64ThreshHold;  
   DWORD m_dwStartTick;  
   DWORD m_dwParamOrdinal;  
  
private:  
   ULONG m_cRef;   // Reference count (not used).  
   ULONG m_iReadPos;   // Current index position for reading from the buffer.  
   ULONG m_iWritePos;   // Current index position for writing to the buffer.  
};  
  
#endif // !defined(AFX_ISSHELPER_H__7B88E5F3_263F_11D2_9D1F_00C04F96B8B2__INCLUDED_)  
// ISSHelper.cpp: implementation of the CISSHelper class.  
#pragma once  
  
#define WIN32_LEAN_AND_MEAN// Exclude rarely-used stuff from Windows headers  
#include <windows.h>  
#include <stdio.h>// printf(...)  
#include <stddef.h>// offsetof(...)  
#include <conio.h>// _getch()  
#include <oledb.h>// OLEDB  
#include <oledberr.h>// OLEDB  
#include <objbase.h>// CoInitializeEx()  
#include <msdasc.h>// IDataInitialize   
#include <msdadc.h>// OLEDB conversion library header.  
#include <msdaguid.h>// OLEDB conversion library guids.  
#include <tchar.h>  
  
// TODO: reference additional headers your program requires here  
#define _SQLNCLI_OLEDB_ 1  
#include <sqlncli.h>  
  
#include "ISSHelper.h"  
  
#ifdef _DEBUG  
#undef THIS_FILE  
static char THIS_FILE[]=__FILE__;  
#define new DEBUm_NEW  
#endif  
  
// Implementation of ISequentialStream interface  
CISSHelper::CISSHelper(__int64 i64LobBytes) {  
m_cRef= 0;  
m_pBuffer= NULL;  
m_ulLength= 0;  
m_ulStatus  = DBSTATUS_S_OK;  
m_iReadPos= 0;  
m_iWritePos= 0;  
m_i64ThreshHold = i64LobBytes;  
m_i64BytesUploaded = 0;  
    m_i64LastPrintUploaded = 0;  
m_dwStartTick = 0;  
m_dwParamOrdinal = 0;  
}  
  
CISSHelper::~CISSHelper() {  
Clear();  
}  
  
void CISSHelper::Clear() {  
CoTaskMemFree( m_pBuffer );  
m_cRef= 0;  
m_pBuffer= NULL;  
m_ulLength= 0;  
m_ulStatus  = DBSTATUS_S_OK;  
m_iReadPos= 0;  
m_iWritePos= 0;  
}  
  
ULONG CISSHelper::AddRef() {  
return ++m_cRef;  
}  
  
ULONG CISSHelper::Release() {  
return --m_cRef;  
}  
  
HRESULT CISSHelper::QueryInterface( REFIID riid, void** ppv ) {  
*ppv = NULL;  
if ( riid == IID_IUnknown ) *ppv = this;  
if ( riid == IID_ISequentialStream ) *ppv = this;  
if ( *ppv ) {  
( (IUnknown*) *ppv )->AddRef();  
return S_OK;  
}  
return E_NOINTERFACE;  
}  
  
HRESULT CISSHelper::Read( void *pv,ULONG cb, ULONG* pcbRead ) {  
// Check parameters.  
if ( pcbRead ) *pcbRead = 0;  
if ( !pv ) return STG_E_INVALIDPOINTER;  
if ( 0 == cb ) return S_OK;   
  
// Cut out now if threshold is hit.  
__int64 left = m_i64ThreshHold-m_i64BytesUploaded;  
    if (left < cb)  
        cb = (ULONG)left;  
  
if (0 == m_dwStartTick)  
m_dwStartTick = GetTickCount();  
  
m_i64BytesUploaded += cb;  
  
    if(( m_i64BytesUploaded - m_i64LastPrintUploaded ) >= (1024*1024*4))     {  
__int64 i64Elapsed = (__int64) GetTickCount()-m_dwStartTick;  
        __int64 i64BytesPerSecond = ( ( m_i64BytesUploaded * 1000) / i64Elapsed ) > 0 ? i64Elapsed : 1;  
printf("Param=%lu TotalBytes=%010I64u ElapsedMS=%010I64u BytesPerSec=%010I64u\n",   
m_dwParamOrdinal, m_i64BytesUploaded, i64Elapsed, i64BytesPerSecond );  
        m_i64LastPrintUploaded = m_i64BytesUploaded;  
}  
  
    if( cb == left ) {  
__int64 i64Elapsed = (__int64) GetTickCount()-m_dwStartTick;  
        __int64 i64BytesPerSecond = ( ( m_i64BytesUploaded * 1000 ) / i64Elapsed > 0 ) ? i64Elapsed : 1;  
        printf("Last read:\nParam=%lu TotalBytes=%010I64u ElapsedMS=%010I64u BytesPerSec=%010I64u\n",   
m_dwParamOrdinal, m_i64BytesUploaded, i64Elapsed, i64BytesPerSecond );  
        m_i64LastPrintUploaded = m_i64BytesUploaded;  
    }  
  
    if (pcbRead)  
       *pcbRead = cb;  
  
return S_OK;  
}  
  
HRESULT CISSHelper::Write( const void *pv, ULONG cb, ULONG* pcbWritten ) {  
// Check parameters.  
if ( !pv ) return STG_E_INVALIDPOINTER;  
if ( pcbWritten ) *pcbWritten = 0;  
if ( 0 == cb ) return S_OK;  
  
// Enlarge the current buffer.  
m_ulLength += cb;  
  
// Grow internal buffer to new size.  
m_pBuffer = CoTaskMemRealloc( m_pBuffer, m_ulLength );  
  
// Check for out of memory situation.  
if ( NULL == m_pBuffer ) {  
Clear();  
return E_OUTOFMEMORY;  
}  
  
// Copy callers memory to internal bufffer and update write position.  
memcpy( (void*)((BYTE*)m_pBuffer + m_iWritePos), pv, cb );  
m_iWritePos += cb;  
  
// Return bytes written to caller.  
if ( pcbWritten )   
       *pcbWritten = cb;  
  
return S_OK;  
}  
//  IRowsetFastLoadUpload.cpp  
#pragma once  
  
#define WIN32_LEAN_AND_MEAN// Exclude rarely-used stuff from Windows headers  
#include <windows.h>  
#include <stdio.h>// printf(...)  
#include <stddef.h>// offsetof(...)  
#include <conio.h>// _getch()  
#include <oledb.h>// OLEDB  
#include <oledberr.h>// OLEDB  
#include <objbase.h>// CoInitializeEx()  
#include <msdasc.h>// IDataInitialize   
#include <msdadc.h>// OLEDB conversion library header.  
#include <msdaguid.h>// OLEDB conversion library guids.  
#include <tchar.h>  
  
#define _SQLNCLI_OLEDB_ 1  
#include <sqlncli.h>  
  
#include "ISSHelper.h"  
#include <assert.h>  
  
#define SAFE_RELEASE(x)    { if (x) { x->Release(); x = NULL; } }  
#define SAFE_SYSFREE(bstr) { if (bstr) { ::SysFreeString(bstr); bstr = NULL; } }  
#define CHECK_HR(hr,jump)  { if ( FAILED(hr) ) goto jump; }  
#define CHECK_HR_ERR(hr,jump)  { if ( FAILED(hr) ) { DumpErrorRecords(); goto jump; } }  
  
// Helper function for DumpErrorRecords() to convert a clisd to string representation of clsid.  
LPWSTR CLSIDToString( CLSID* pclsid ) {  
   static WCHAR wszCLSID[1024];  
   if ( NULL == pclsid )  
      wcscpy_s(wszCLSID, 1024, L"(Null)");  
   else  
      ::StringFromGUID2( *pclsid, (OLECHAR*)wszCLSID, sizeof(wszCLSID) );  
  
   return wszCLSID;  
}  
  
// Helper function to dump out OLE DB errors to console window.  
HRESULT DumpErrorRecords() {  
   HRESULT hr = S_OK;  
   IErrorRecords* pIErrorRecords = NULL;  
   IErrorInfo* pIErrorInfo = NULL;  
   IErrorInfo* pIErrorInfoRecord = NULL;  
   BSTR bstrDescription = NULL;  
   BSTR bstrSource = NULL;  
   ULONG i;  
   ULONG cRecords = 0;  
   LCID lcid = 0;  
   ERRORINFO ErrorInfo;  
  
   // Get IErrorInfo pointer from OLE.  
   hr = ::GetErrorInfo( 0, &pIErrorInfo );  
   if ( hr != S_OK ) {  
      printf( "No error records found.\n" );  
      goto DumpErrorRecordsExit;  
   }  
  
   // QI for IID_IErrorRecords.  
   hr = pIErrorInfo->QueryInterface( IID_IErrorRecords, (void**)&pIErrorRecords );  
   if ( FAILED(hr) ) {  
      printf( "pIErrorInfo->QueryInterface(IID_IErrorRecords) failed with hr=0x%08x.\n", hr );  
      goto DumpErrorRecordsExit;  
   }  
  
   // Get error record count.  
   hr = pIErrorRecords->GetRecordCount( &cRecords );  
   if ( FAILED(hr) ) {  
      printf( "pIErrorRecords->GetRecordCount() failed with hr=0x%08x.\n", hr );  
      goto DumpErrorRecordsExit;   
   }  
  
   // Get system LCID  
   lcid = GetSystemDefaultLCID();   
  
   //Loop through the error records.  
   for ( i = 0 ; i < cRecords ; i++ ) {  
      // Get pIErrorInfo from pIErrorRecords.  
      hr = pIErrorRecords->GetErrorInfo( i, lcid, &pIErrorInfoRecord );  
  
      if ( SUCCEEDED(hr) ) {  
         // Get error description and source.  
         hr = pIErrorInfoRecord->GetDescription( &bstrDescription );  
         hr = pIErrorInfoRecord->GetSource( &bstrSource );  
  
         // Retrieve the ErrorInfo structures.  
         hr = pIErrorRecords->GetBasicErrorInfo( i, &ErrorInfo );  
  
         // Dump out error.  
         printf( "\n" );  
         printf( "Dumping error record %lu of %lu:\n", i+1, cRecords );  
         printf( "--------------------------------------------------------------------------\n" );  
         printf( "   Description = %S\n", bstrDescription );  
         printf( "   Source      = %S\n", bstrSource );  
         printf( "   ERRORINFO.hrError = 0x%08x\n", ErrorInfo.hrError );  
         printf( "   ERRORINFO.dwMinor = %lu\n",ErrorInfo.dwMinor );   
         printf( "   ERRORINFO.clsid   = %S\n",CLSIDToString( &ErrorInfo.clsid ) );  
  
         SAFE_RELEASE(pIErrorInfoRecord);  
         SAFE_SYSFREE(bstrDescription);  
         SAFE_SYSFREE(bstrSource);  
      }  
   }  
  
DumpErrorRecordsExit:  
   SAFE_RELEASE(pIErrorInfoRecord);  
   SAFE_RELEASE(pIErrorRecords);  
   SAFE_RELEASE(pIErrorInfo);  
   SAFE_RELEASE(pIErrorInfo);  
   SAFE_SYSFREE(bstrDescription);  
   SAFE_SYSFREE(bstrSource);  
   return hr;  
}  
  
// to open a session  
  
// 1) create a properties object  
// 2) set properties on it (such as INIT_DATASOURCE, etc.)  
// 3) queryinterface an IDBInitialize on the properties object  
// 4) call IDBInitialize::Initialize  
// 5) queryinterface an IDBCreateSession on the IDBInitialize instance  
// 6) call IDBCreateSession::CreateSession with interface to use on the session (IDBCreateCommand, IOpenRowset, IBCPSession, etc.)  
  
HRESULT OpenSession( wchar_t* datasource, wchar_t* catalog, const IID& iid, void** out ) {  
#define SET_BSTR_PROP(index, proparray, propid, value) \  
   { proparray[index].dwOptions = DBPROPOPTIONS_REQUIRED; \  
   proparray[index].colid = DB_NULLID; \  
   proparray[index].dwStatus = DBPROPSTATUS_OK; \  
   proparray[index].dwPropertyID = propid; \  
   proparray[index].vValue.vt = VT_BSTR; \  
   proparray[index].vValue.bstrVal = SysAllocString(value); }  
  
#define SET_BOOL_PROP(index, proparray, propid, value) \  
   { proparray[index].dwOptions = DBPROPOPTIONS_REQUIRED; \  
   proparray[index].colid = DB_NULLID; \  
   proparray[index].dwStatus = DBPROPSTATUS_OK; \  
   proparray[index].dwPropertyID = propid; \  
   proparray[index].vValue.vt = VT_BOOL; \  
   proparray[index].vValue.boolVal = (value) ? VARIANT_TRUE : VARIANT_FALSE; }  
  
   HRESULT hr;  
  
   static IDBProperties*    pIDBProperties = NULL;  
   IDBProperties*pIDBSessionProperties = NULL;  
   IDBInitialize*pIDBInitialize = NULL;    
   static IDBCreateSession*pIDBCreateSession = NULL;  
  
   DBPROPInitProperties[3];  
   DBPROP       BulkCopyProperties[2];  
   DBPROPSETPropSet[2];  
  
   hr = CoCreateInstance( SQLNCLI_CLSID, NULL, CLSCTX_INPROC_SERVER, IID_IDBProperties,   
      (void **) &pIDBProperties );      
   CHECK_HR_ERR(hr,OpenSessionCleanup);  
  
   // Hard coded this to point to local sql server, change as needed.  
   SET_BSTR_PROP( 0, InitProperties, DBPROP_INIT_DATASOURCE, datasource );  
   SET_BSTR_PROP( 1, InitProperties, DBPROP_INIT_CATALOG, catalog );  
   SET_BSTR_PROP( 2, InitProperties, DBPROP_AUTH_INTEGRATED, L"SSPI" );  
  
   SET_BOOL_PROP( 0, BulkCopyProperties, SSPROP_ENABLEFASTLOAD, true );  
   SET_BOOL_PROP( 1, BulkCopyProperties, SSPROP_ENABLEBULKCOPY, true );  
  
   PropSet[0].guidPropertySet = DBPROPSET_DBINIT;   
   PropSet[0].cProperties = 3;                 
   PropSet[0].rgProperties = InitProperties;   
  
   PropSet[1].guidPropertySet = DBPROPSET_SQLSERVERDATASOURCE;  
   PropSet[1].cProperties = 2;  
   PropSet[1].rgProperties = BulkCopyProperties;  
  
   pIDBProperties->SetProperties( 1, (DBPROPSET*) &PropSet );  
   CHECK_HR_ERR( hr, OpenSessionCleanup );  
  
   hr = pIDBProperties->QueryInterface( IID_IDBInitialize, (void**) &pIDBInitialize );  
   CHECK_HR_ERR( hr,OpenSessionCleanup );  
  
   hr = pIDBInitialize->Initialize();  
   CHECK_HR_ERR( hr,OpenSessionCleanup );  
  
   // QI for IID_IDBCreateSession and then create session.  
   hr = pIDBInitialize->QueryInterface( IID_IDBCreateSession, (void**) &pIDBCreateSession );  
   CHECK_HR_ERR( hr,OpenSessionCleanup );  
  
   pIDBCreateSession->QueryInterface( IID_IDBProperties, (void**) &pIDBSessionProperties );  
   pIDBSessionProperties->SetProperties( 1, &PropSet[1] );  
  
   assert( pIDBCreateSession != NULL );  
   hr = pIDBCreateSession->CreateSession( NULL, iid, (IUnknown**) out );  
  
OpenSessionCleanup:  
   SAFE_RELEASE( pIDBProperties );  
   SAFE_RELEASE( pIDBInitialize );  
   SAFE_RELEASE( pIDBCreateSession );  
   SAFE_RELEASE( pIDBSessionProperties );  
  
   return hr;      
}  
  
// Helper function to execute a sql command.  
HRESULT ExecuteSQL( IDBCreateCommand* pIDBCreateCommand, LPCOLESTR pwszCommand  ) {  
   HRESULT hr;  
   ICommandText* pICommandText = NULL;  
   hr = pIDBCreateCommand->CreateCommand( NULL, IID_ICommandText, (IUnknown**)&pICommandText );  
   CHECK_HR_ERR(hr,ExecuteSQLCleanup);  
   hr = pICommandText->SetCommandText( DBGUID_DBSQL, pwszCommand );  
   CHECK_HR_ERR(hr,ExecuteSQLCleanup);  
   hr = pICommandText->Execute( NULL, IID_NULL, NULL, NULL, NULL );  
  
ExecuteSQLCleanup:  
   SAFE_RELEASE(pICommandText);  
   return hr;  
}  
  
void wmain(int argc, wchar_t* argv[]) {  
   HRESULT hr;  
   IOpenRowset * pIOpenRowset = NULL;  
   IRowsetFastLoad * pIRowsetFastLoad = NULL;  
   IDBCreateCommand * pIDBCreateCommand = NULL;  
   IAccessor * pIAccessor = NULL;  
  
   HACCESSOR hAccessor;  
   DBBINDING dbBind[ 2 ];  
   DBBINDSTATUS dbBindStatus[ 2 ];  
  
   if ( argc < 3 ) {  
      wprintf( L"Usage: IRowsetFastLoadUpload <server> <size>\n");  
      return;  
   }  
  
   unsigned __int64 size = _wcstoui64( argv[2], NULL, 16 ) ;  
   if ( size <= (1024*1024*4) ) {  
      wprintf( L"size must be at least 4MB (either it's too small or it's not a well formed number)\n" );  
      return;  
   }  
  
   CISSHelper issHelper1( size );  
  
   CoInitialize(NULL);  
  
   // Open connection to SS database for the command  
   hr = OpenSession( argv[1], L"master", IID_IDBCreateCommand, (void**) &pIDBCreateCommand );  
   CHECK_HR_ERR(hr,MainCleanup);  
  
   // Enable filestream ,drop and re-create test table and procedure.  
   hr = ExecuteSQL( pIDBCreateCommand, L"exec sp_configure 'filestream access level', 2" );  
  
   CHECK_HR_ERR( hr, MainCleanup );  
   hr = ExecuteSQL( pIDBCreateCommand, L"reconfigure" );  
   CHECK_HR_ERR( hr, MainCleanup );  
   hr = ExecuteSQL( pIDBCreateCommand, L"IF EXISTS (SELECT name FROM master..sysdatabases WHERE name = 'DBFsa') DROP DATABASE [DBFsa]");  
   CHECK_HR_ERR(hr, MainCleanup);  
   hr = ExecuteSQL( pIDBCreateCommand, L"IF NOT EXISTS (SELECT name FROM sysdatabases WHERE name = 'DBFsa')"  
      L"CREATE DATABASE [DBFsa] ON PRIMARY (NAME=[dbf], FILENAME='c:\\DBFsa\\dbf.mdf'),"   
      L"FILEGROUP [FsGrp] CONTAINS FILESTREAM (NAME=[FsCnt], FILENAME='c:\\DBFsa\\FsCnt')"  
      L"LOG ON (NAME = [dbl], FILENAME = 'c:\\DBFsa\\dbl.ldf', SIZE = 5MB, MAXSIZE = 3000MB, FILEGROWTH = 5MB)");  
   CHECK_HR_ERR(hr, MainCleanup);  
   hr = ExecuteSQL( pIDBCreateCommand, L"IF NOT EXISTS(SELECT name FROM [DBFsa]..[sysobjects] WHERE name='FSTRTable' AND type='U') "  
      L"CREATE TABLE [DBFsa]..[FSTRTable] (uid int NOT NULL UNIQUE NONCLUSTERED, val VARBINARY(MAX) FILESTREAM, "  
      L"rowguid uniqueidentifier ROWGUIDCOL NOT NULL UNIQUE DEFAULT NEWID())");  
   CHECK_HR_ERR(hr, MainCleanup);  
   printf( "Creation of table+proc via ExecuteSQL(...) returned 0x%08x.\n", hr );  
  
   // Open connection to SS database for the IOpenRowset  
   hr = OpenSession( argv[1], L"master", IID_IOpenRowset, (void**) &pIOpenRowset );  
   CHECK_HR_ERR(hr,MainCleanup);  
  
   DBID table;  
   table.eKind = DBKIND_NAME;  
   table.uName.pwszName = L"[DBFsa]..[FSTRTable]";  
  
   hr = pIOpenRowset->OpenRowset( NULL, &table, NULL, IID_IRowsetFastLoad, 0, NULL, (IUnknown**) &pIRowsetFastLoad );  
   CHECK_HR_ERR(hr,MainCleanup);  
  
   // Set up parameter value binding.  
   ZeroMemory( &dbBind, sizeof(dbBind) );  
  
   struct _PARAM_BLOCK {  
      long f1;  
      long f1_status;  
      long f1_length;  
      unsigned long imageData_length;  
      long imageData_status;  
      IUnknown* imageData;  
   } PARAM_BLOCK;  
  
   dbBind[0].iOrdinal= 1;  
   dbBind[0].dwPart= DBPART_VALUE | DBPART_STATUS | DBPART_LENGTH;  
   dbBind[0].eParamIO= DBPARAMIO_NOTPARAM;  
   dbBind[0].obValue= offsetof( _PARAM_BLOCK, f1 );  
   dbBind[0].obStatus= offsetof( _PARAM_BLOCK, f1_status );  
   dbBind[0].obLength= offsetof( _PARAM_BLOCK, f1_length );  
   dbBind[0].wType= DBTYPE_I4;  
   dbBind[0].cbMaxLen= sizeof(int);  
  
   dbBind[1].iOrdinal= 2;  
   dbBind[1].dwPart= DBPART_VALUE | DBPART_STATUS;  
   dbBind[1].eParamIO= DBPARAMIO_NOTPARAM;  
   dbBind[1].obValue= offsetof( _PARAM_BLOCK, imageData );  
   dbBind[1].obStatus= offsetof( _PARAM_BLOCK, imageData_status );  
   dbBind[1].obLength  = offsetof( _PARAM_BLOCK, imageData_length );  
   dbBind[1].dwMemOwner = DBMEMOWNER_CLIENTOWNED;  
   dbBind[1].wType= DBTYPE_IUNKNOWN;  
   dbBind[1].pObject= new DBOBJECT;  
   dbBind[1].pObject->dwFlags = STGM_READ;  
   dbBind[1].pObject->iid = IID_ISequentialStream;  
   dbBind[1].cbMaxLen= 0;  
  
   // Get an accessor for our binding.  
   hr = pIRowsetFastLoad->QueryInterface( IID_IAccessor, (void**)&pIAccessor );  
   CHECK_HR_ERR(hr,MainCleanup);  
  
   hr = pIAccessor->CreateAccessor( DBACCESSOR_ROWDATA,  
      2,  
      &dbBind[0],   
      sizeof(PARAM_BLOCK),   
      &hAccessor,   
      dbBindStatus );  
   printf( "pIAccessor->CreateAccessor(...) returned 0x%08x.\n", hr );  
   CHECK_HR_ERR(hr,MainCleanup);  
  
   // Set the parameter values and status/length.  
   PARAM_BLOCK.f1 = 1;  
   PARAM_BLOCK.f1_status = DBSTATUS_S_OK;  
   PARAM_BLOCK.f1_length = sizeof(int);  
   PARAM_BLOCK.imageData = (IUnknown*)&issHelper1;  
   PARAM_BLOCK.imageData_status = DBSTATUS_S_OK;  
   PARAM_BLOCK.imageData_length = (long)issHelper1.m_i64ThreshHold;  
  
   issHelper1.m_dwParamOrdinal=1;  
  
   hr = pIRowsetFastLoad->InsertRow( hAccessor, &PARAM_BLOCK );  
   CHECK_HR_ERR( hr, MainCleanup );  
  
   hr = pIRowsetFastLoad->Commit( TRUE );  
   CHECK_HR_ERR( hr, MainCleanup );  
  
MainCleanup:  
   SAFE_RELEASE( pIRowsetFastLoad );  
   SAFE_RELEASE( pIOpenRowset );  
   SAFE_RELEASE( pIDBCreateCommand );  
   SAFE_RELEASE( pIAccessor );  
  
   printf_s( "Test complete.\n" );  
}  
EXEC sp_detach_db 'DBFsa'
GO

IF EXISTS (SELECT name
           FROM   master..sysdatabases
           WHERE  name = 'DBFsa')
    DROP DATABASE [DBFsa];