BUG: Query with Complex View Hierarchy May Be Slow to Compile

ID: Q232707

The information in this article applies to:
BUG #: 55348 (SQLBUG_70)

SYMPTOMS

A query against a complex hierarchy of views that includes an IN clause containing a subquery may be slower to compile in SQL Server 7.0 than it was in SQL Server 6.5.


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 SQL Server service pack 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: 

   Version         File name     Platform
   --------------------------------------

   7.00.0662      Sqlservr.exe   Intel
   7.00.0662       Impprov.dll   Intel
   7.00.0662      Sqlservr.exe   Alpha
   7.00.0662       Impprov.dll   Alpha
NOTE: Due to file dependencies, the most recent hotfix or feature that contains the above files may also contain additional files.


NOTE: If this product was already installed on your computer when you purchased it from the Original Equipment Manufacturer (OEM) and you need this fix, please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, and if it is determined that you only require the fix you requested, no fee will be charged. However, if you request additional technical support, and if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support, you may be charged a non-refundable fee.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:
Q154871 Determining If You Are Eligible for No-Charge Technical Support


WORKAROUND

To work around this problem, avoid using IN clauses that contain a subquery within any of the views in the hierarchy.


STATUS

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

Additional query words: 


Keywords          : SSrvTran_SQL kbbug7.00 
Version           : winnt:7.0
Platform          : winnt 
Issue type        : kbbug

Last Reviewed: July 2, 1999