BUG: Optimizer Chooses Table Scan Instead of Index Seek for Simple SELECT Involving @@identity

• Microsoft SQL Server version 7.0

SYMPTOMS

When you include @@IDENTITY in the WHERE clause of a SELECT statement, the Query Optimizer chooses to perform a table scan rather than using the appropriate index.

CAUSE

@@IDENTITY is not being recognized as a run-time constant.

WORKAROUND

Declare a variable, set it equal to @@IDENTITY, and then use the variable in the SELECT statement.

STATUS

Microsoft has confirmed this to be a problem in SQL Server version 7.0.

Additional query words:

Keywords : kbSQLServ700bug
Version : winnt:7.0
Platform : winnt
Issue type : kbbug