使用 IRowsetFastUpload 向 FILESTREAM 列发送数据 (OLE DB)
此示例使用 IRowsetFastUpload 接口向 filestream 列发送大小在 4 MB 与 4 GB 之间的数据。
有关文件流功能的详细信息，请参阅 FILESTREAM 支持 (OLE DB)。
示例
在编译和运行此示例之前，启用 FILESTREAM 支持（启用和配置 FILESTREAM）。
请确保您的 INCLUDE 环境变量包括含有 sqlncli.h 的目录。
该服务器必须具有名为 C:\DBFsa 的目录，示例将在其中创建数据库。 您的 SQL Server 实例必须对此位置具有写访问权限（例如，采用本地系统帐户登录）。
复制第一个代码列表，并将其粘贴到名为 ISSHelper.h 的文件中。
复制第二个代码列表，并将其粘贴到名为 ISSHelper.cpp 的文件中。
复制第三个代码列表，并将其粘贴到名为 IRowsetFastLoadUpload.cpp 的文件中。
编译 IRowsetFastLoadUpload.cpp、ISSHelper.cpp、ole32.lib 和 oleaut32.lib。
运行此示例时，必须传递服务器名称或“服务器\实例名称”，以及一个介于 4 MB (0x400001) 与 4 GB (0xFFFFFFFF) 之间的值，指示写入的数据量。
第四个 (Transact-SQL) 代码列表删除此示例创建的数据库。
// 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" );
}
sp_detach_db 'DBFsa'
IF EXISTS (SELECT name FROM master..sysdatabases WHERE name = 'DBFsa') DROP DATABASE [DBFsa] |