BUG: SQLOLEDB May Spawn Additional Connection For Action Query (191268)


The information in this article applies to:

  • Microsoft OLE DB 2.0
  • ActiveX Data Objects (ADO) 2.0
  • ActiveX Data Objects (ADO) 2.1 SP2
  • ActiveX Data Objects (ADO) 2.5
  • ActiveX Data Objects (ADO) 2.6
  • ActiveX Data Objects (ADO) 2.7
  • Microsoft Visual Basic Professional Edition for Windows 5.0
  • Microsoft Visual Basic Professional Edition for Windows 6.0
  • Microsoft Visual Basic Enterprise Edition for Windows 5.0
  • Microsoft Visual Basic Enterprise Edition for Windows 6.0
  • Microsoft Visual Studio, Enterprise Edition 6.0
  • Microsoft Visual Studio 97
This article was previously published under Q191268

SYMPTOMS

If you have a server-side cursor open and execute an action query, the SQL Server OLE DB Provider treats an action query as if it returned data in a forward-only, read-only cursor and isolates that query on its own connection. This connection is created solely for the action query and is closed immediately after executing the query.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

If you do not have a server-side cursor currently opened on the ActiveX Data Objects (ADO) connection object, the SQL Server OLE DB provider does not create a second connection to the database.

Use SQL Server's SQL Trace utility to see that the following code establishes a second connection to the database to perform the action query. Modify the Data Source, User ID, and Password in the connection string to connect to your SQL Server database.

Here is the code: 
   Dim cnPubs As New ADODB.Connection
   Dim rsKeyset As New ADODB.Recordset
   Dim strConn As String
   Dim strSQL As String
   Dim strActionQuery As String

   strConn = "Provider=SQLOLEDB;Data Source=MyServer;Initial Catalog=pubs;User ID=UserName;Password=password;"
   strSQL = "SELECT * FROM Authors"
   strActionQuery = "DELETE FROM Authors WHERE 1 = 0"

   cnPubs.Open strConn, "sa", ""
   rsKeyset.Open strSQL, cnPubs, adOpenKeyset, adLockReadOnly, adCmdText
   cnPubs.Execute CommandText:=strActionQuery, Options:=adExecuteNoRecords
Modification Type:MinorLast Reviewed:8/11/2005
Keywords:kbBug kbDatabase kbpending KB191268
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