BUG: OLE DB Provider for ODBC Allocates 64K Hash Table for Server-Side Cursor

ID: Q203726

The information in this article applies to:

Microsoft OLE DB Provider for ODBC, versions 1.0, 1.1, 1.5, 2.0
Microsoft Data Access Components versions 2.0, 2.1 SP2

SYMPTOMS

When you use server-side Keyset cursors with the OLE DB Provider for ODBC shipping with MDAC 2.0, a hash table is created, which is used to hold bookmarks for each row in the rowset, and the provider allocates 64K to the table by default.

RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next MDAC 2.0 Service Pack 1 available with Windows NT 4.0 Service Pack 4, or upgrade to the MDAC 2.1 components that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

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

OLE DB Core


   Date      Time    Size       File name     
   -----------------------------------------

   08/14/98  04:04p  182,272    msdadc.dll
   08/14/98  04:01p   48,128    msdaenum.dll
   08/14/98  03:40p   63,488    msdaer.dll
   08/14/98  03:40p   15,360    msdaerr.dll
   08/14/98  03:32p   14,336    msdaps.dll
   08/14/98  03:44p  101,376    msdatt.dll

OLE DB Provider for ODBC Drivers


   Date      Time    Size       File name     
   -----------------------------------------

   08/14/98  03:51p  688,128    msdasql.dll
   08/14/98  03:52p    9,728    msdasqlr.dll
   08/14/98  03:36p  171,520    msdatl2.dll

The QFE build affects two components of the MDAC 2.0 stack, OLE-DB Core components, and the OLE-DB Provider for ODBC Drivers.

NOTE: MDAC 2.0 Service Pack 1 is only intended for computer that have Windows NT 4.0 Service Pack 4 installed.

NOTE: Due to file dependencies, the most recent hotfix or feature that contains the above files may also contain additional files.

To install the hotfix

Locate the MSDASQL.DLL on the target computer. This is usually located in the following directory:
c:\program files\common files\system\ole db

Copy the zip file to the directory where MSDASQL.DLL was found.

Unzip the file, and answer Yes to all overwrite questions.

To uninstall this fix run the install for the 2.0 version of the MDAC components from the following Web site:

http://www.microsoft.com/data.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug was corrected in MDAC 2.1.

Additional query words:

Keywords : kbADO kbDatabase kbOLEDB kbProvider kbGrpMDAC
Version : WINDOWS:1.0,1.1,1.5,2.0,2.1 SP2
Platform : WINDOWS
Issue type : kbbug