BUG: Locks Held Using Optimistic Concurrency with No Unique Index

ID: Q172694

The information in this article applies to:

Microsoft SQL Server version 6.5

BUG #: 17161 (NT: 6.5)

SYMPTOMS

A dynamic or forward-only cursor opened with optimistic concurrency using either timestamps (OPTCC) or values (OPTCCVAL) will incorrectly hold a Sh_intent lock on the pages from which the rows were fetched. This problem occurs only if there is no unique index on the table.

WORKAROUND

To work around this problem, create a unique index on the table.

STATUS

Microsoft has confirmed this to be a problem in Microsoft SQL Server version 6.5. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

This problem does not occur with keyset or insensitive cursors because they default to read-only with no unique index.

Additional query words: ODBC SQL_CONCUR_ROWVER SQL_CONCUR_VALUES


Keywords          : kbprg kbusage SSrvProg SSrvTran_SQL kbbug6.50 
Version           : 6.5
Platform          : WINDOWS 
Issue type        : kbbug

Last Reviewed: April 20, 1999