Update: Speicherleck in MDAC SQLOLEDB-Provider auf SERVERDATAONINSERT und Spaltengröße mit mehr als 255

Hotfix

   Date         Version    Size           File name     Platform
   -------------------------------------------------------------
   04-Jun-2001  7.1.9.99   545,040 bytes  Sqloledb.dll  x86
				

   Date          Version        Size           File name     Platform
   ------------------------------------------------------------------
   11-Jun-2001   2000.80.301.0  491,584 bytes  Sqloledb.dll  x86
   11-Jun-2001   2000.80.301.0   61,440 bytes  Sqloledb.dll  x86
				

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Schritte zum Reproduzieren des Verhaltens

1. Erstellen Sie in Microsoft SQL Server 2000 die folgenden Tabellen:

   if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[STATEMIN1]') 
   and OBJECTPROPERTY(id, N'IsUserTable') = 1)
   drop table [dbo].[STATEMIN1]<BR/>
   GO
   
   CREATE TABLE [dbo].[STATEMIN1] (
   	[messagekey] [int] IDENTITY (1, 1) NOT NULL ,
   	[message] [varchar] (2000) NOT NULL 
   ) ON [PRIMARY]
   GO
   
   ALTER TABLE [dbo].[STATEMIN1] WITH NOCHECK ADD 
   	CONSTRAINT [PK_STATEMIN1] PRIMARY KEY  CLUSTERED 
   	(
   		[messagekey]
   	)  ON [PRIMARY] 
   GO
   					

2. Fügen Sie folgenden Code in eine Microsoft Visual C++-Konsolenanwendung, und kompilieren Sie den Code.
   
   Hinweis : Sie müssen ändern, Name der Datenquelle, Benutzerkennung und Kennwort.

   #include <afx.h>
   #include <assert.h>
   #include <iostream>
   #include <atldbcli.h>
   #include <objbase.h>
   
   const ULONG nInitProps = 4;
   const ULONG nPropSet = 1;
   const ULONG nParams = 3; //Number of parameters in the command
   const ULONG nProps = 5;
   
   struct StateIn
   	{
   	UINT uiMessageKey;
   	TCHAR pszMessage[257];
   };
   
   int main(void)
   {
      	CCommand<CManualAccessor,CRowset,CNoMultipleResults> rs;
   
   	CDataSource m_connect;
   	CSession m_session;
   	
   	DBPROP    InitProperties[nProps];
   	DBPROPSET   rgInitPropSet;
   
   	USES_CONVERSION;
   	HRESULT   hr;
   
   	hr = CoInitialize(NULL);
   
   	for (ULONG i = 0; i < nProps; i++ )
   	{
   		VariantInit(&InitProperties[i].vValue);
   		InitProperties[i].dwOptions = DBPROPOPTIONS_REQUIRED;
   		InitProperties[i].colid = DB_NULLID;
   	}
   
   	InitProperties[0].dwPropertyID = DBPROP_INIT_PROMPT;
   	InitProperties[0].vValue.vt = VT_I2;
   	InitProperties[0].vValue.iVal = DBPROMPT_NOPROMPT;
   
   	InitProperties[1].dwPropertyID = DBPROP_INIT_DATASOURCE;
   	InitProperties[1].vValue.vt = VT_BSTR;
   	InitProperties[1].vValue.bstrVal = 
            SysAllocString(OLESTR("servername"));                            // Server Name
   
   	InitProperties[2].dwPropertyID = DBPROP_INIT_CATALOG;
   	InitProperties[2].vValue.vt = VT_BSTR;
   	InitProperties[2].vValue.bstrVal = SysAllocString(L"database");    // Database Name
   	InitProperties[2].dwOptions = DBPROPOPTIONS_REQUIRED;
   	InitProperties[2].colid = DB_NULLID;
   
   	InitProperties[3].dwPropertyID = DBPROP_AUTH_USERID;
   	InitProperties[3].vValue.vt = VT_BSTR;
   	InitProperties[3].vValue.bstrVal = SysAllocString(OLESTR("sa"));    // User Id.
   
   	InitProperties[4].dwPropertyID = DBPROP_AUTH_PASSWORD;
   	InitProperties[4].vValue.vt = VT_BSTR;
   	InitProperties[4].vValue.bstrVal = SysAllocString(OLESTR(""));      // Password
   
   	
   	rgInitPropSet.guidPropertySet = DBPROPSET_DBINIT;
   	rgInitPropSet.cProperties = nProps;
   	rgInitPropSet.rgProperties = InitProperties;
   
   	char szProgID[100] = {0};
   	strcpy(szProgID,"SQLOLEDB");
   	CLSID clsid;
   	WCHAR   wszProgId[100] = {0};
   	MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, szProgID, -1,   wszProgId, 100);
   	hr = CLSIDFromProgID(wszProgId, &clsid);
   	hr = m_connect.Open(clsid,&rgInitPropSet);
   	hr = m_session.Open(m_connect);
   
   	SysFreeString(InitProperties[1].vValue.bstrVal);
   	SysFreeString(InitProperties[2].vValue.bstrVal);
   	SysFreeString(InitProperties[3].vValue.bstrVal);
   	SysFreeString(InitProperties[4].vValue.bstrVal);
   
   	DWORD dwStatus;
   	dwStatus = DBSTATUS_S_IGNORE;
   
   	CDBPropSet propset(DBPROPSET_ROWSET);
   	propset.AddProperty(DBPROP_IRowsetChange, true);
   	propset.AddProperty(DBPROP_IRowsetUpdate, false);
   	propset.AddProperty(DBPROP_UPDATABILITY,
   		DBPROPVAL_UP_INSERT | DBPROPVAL_UP_DELETE);
   	propset.AddProperty(DBPROP_SERVERDATAONINSERT,true);
   
   	StateIn rowValue_StateIn;
   
   	rs.CreateAccessor(2, &rowValue_StateIn, sizeof(rowValue_StateIn));
   
   	rs.AddBindEntry(1, DBTYPE_I4,sizeof(rowValue_StateIn.uiMessageKey), 
             &rowValue_StateIn.uiMessageKey,NULL,&dwStatus);
   	rs.AddBindEntry(2, DBTYPE_STR, sizeof(rowValue_StateIn.pszMessage),
             &rowValue_StateIn.pszMessage,NULL);
   
   	TCHAR * m_strQuery = _T("select * from statemin1");
   	hr = rs.Create(m_session,m_strQuery);
   	hr = rs.Open(&propset);
   	
   	dwStatus = DBSTATUS_S_IGNORE;
   	TCHAR szInsStr[50];
   	strcpy(szInsStr,"test1");
   
   	strcpy(rowValue_StateIn.pszMessage, szInsStr);
   
   	hr = rs.Insert(0,1);
   
   	for(int j = 0;j < 20000;j++)
   	{	
   		strcpy(rowValue_StateIn.pszMessage, szInsStr);
   		hr = rs.Insert(0,1);
   
   	}
   
      	return S_OK;
   }
   					

3. Starten Sie Systemmonitor, und schauen Sie den Indikator Private Bytes für den Prozess an, während Sie den Code ausgeführt werden.

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