FIX: Rebuilding Indexes with SQLMaint May Cause Incorrect Database

• Microsoft SQL Server version 6.5

SYMPTOMS

When you attempt to rebuild indexes with the Database Maintenance Wizard (Sqlmaint.exe) or execute DBCC DBREINDEX on at least three tables that have at least one index per table, and then attempt to use sp_dboption to put that database in single user mode, you will get the following error:

Msg 3508, Level 16, State 1, Server NTJTK1, Line 1
Attempt to set 'pubs' database to single user mode failed because the usage count is 4. Make sure that no other users are currently using this database and rerun CHECKPOINT.

CAUSE

When the Database Maintenance Wizard is run directly or as a scheduled task that requests a rebuild of indexes, such as the following, it actually executes a DBCC DBREINDEX for each table in that database:

sqlmaint -D pubs -RebldIdx 10 -Rpt c:\temp\Pubs_maint.rpt 

WORKAROUND

To work around this problem, put the database in single user mode before running the Database Maintenance Wizard (Sqlmaint.exe). Also, you can clear the usage count by stopping and restarting SQL Server.

STATUS

Microsoft has confirmed this to be a problem in SQL Server version 6.5. This problem has been corrected in U.S. Service Pack 5a for Microsoft SQL Server version 6.5. For information about downloading and installing the latest SQL Server Service Pack, see http://support.microsoft.com/support/sql/.

For more information, contact your primary support provider.

MORE INFORMATION

The following SQL script demonstrates the problem:

use master
go
sp_dboption pubs, single, false
go
use pubs
go
dbcc dbreindex('dbo.authors', null, 0, sorted_data_reorg)
go
dbcc dbreindex('dbo.discounts', null, 0)
go
dbcc dbreindex('dbo.employee', null, 0, sorted_data_reorg)
go
use master
go
waitfor delay '00:00:01'
go
sp_dboption pubs, single, true
go 

Additional query words: sqlmaint dbreindex

Keywords          : kbusage SSrvGen SSrvSQL_Admin kbbug6.50 kbfix6.50.SP5 
Version           : winnt:6.5
Platform          : winnt 
Issue type        : kbbug 

Last Reviewed: April 21, 1999