FIX: The query runs slower than you expected when you try to parse a query in SQL Server 2000

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Article ID: 891866 - View products that this article applies to.
Bug #: 20000121 (SQL Server 8.0)
Microsoft distributes Microsoft SQL Server 2000 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2000 fix release.
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SUMMARY

This article describes the following about this hotfix release:
  • The issues that are fixed by this hotfix package
  • The prerequisites for installing the hotfix package
  • Whether you must restart the computer after you install the hotfix package
  • Whether the hotfix package is replaced by any other hotfix package
  • Whether you must make any registry changes
  • The files that are contained in the hotfix package

SYMPTOMS

When you try to parse a query in Microsoft SQL Server 2000, you notice that the query runs slower than you expected. This problem may occur when the following conditions are true:
  • Your query is based on a view that contains many aggregate functions.
  • You have a filter condition on your query that is based on an IN list that has many values.

RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must have the following prerequisites installed on the computer:
  • Microsoft SQL Server 2000 Service Pack 3 (SP3)

    For information about how to obtain SQL Server 2000 SP3, click the following article number to view the article in the Microsoft Knowledge Base:
    290211 How to obtain the latest SQL Server 2000 service pack
  • Microsoft SQL Server 2000 hotfix build 8.00.1007

Restart information

You must restart the computer after you apply this hotfix.

Registry information

You do not have to make changes to the registry.

Hotfix file information

This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain all the files that you must have to fully update a product to the latest build.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
SQL Server 2000 32-bit versions
   Date         Time   Version         Size       File name
   -----------------------------------------------------------
   05-Mar-2005  01:03  2000.80.1013.0    664,128  Autoplt.dll      
   05-Mar-2005  01:03  2000.80.1013.0     78,400  Console.exe 
   05-Mar-2005  01:03  2000.80.1013.0    332,352  Ctasksui.dll
   05-Mar-2005  01:03  2000.80.1013.0    315,968  Custtask.dll
   05-Mar-2005  01:03  2000.80.1013.0     33,340  Dbmslpcn.dll
   05-Mar-2005  01:03  2000.80.1013.0  1,905,216  Dtspkg.dll
   05-Mar-2005  01:03  2000.80.1013.0    528,960  Dtspump.dll
   05-Mar-2005  01:03  2000.80.1013.0     41,536  Dtsrun.exe
   05-Mar-2005  01:03  2000.80.1013.0  1,557,052  Dtsui.dll
   05-Mar-2005  01:03  2000.80.1013.0    639,552  Dtswiz.dll
   05-Mar-2005  01:03  2000.80.1013.0    352,828  Isqlw.exe
   05-Mar-2005  01:03  2000.80.1013.0     82,492  Itwiz.exe
   05-Mar-2005  01:03  2000.80.1013.0     90,692  Msgprox.dll
   31-Dec-2004  19:16  8.11.41022.0      226,304  Mssdi98.dll
   05-Mar-2005  01:03  2000.80.1013.0     62,024  Odsole70.dll     
   05-Mar-2005  01:03  2000.80.1013.0     25,144  Opends60.dll
   05-Mar-2005  00:06                     17,576  Opends60.lib
   05-Mar-2005  01:03  2000.80.1013.0     57,904  Osql.exe
   05-Mar-2005  01:03  2000.80.1013.0    279,104  Pfutil80.dll     
   05-Mar-2005  01:03  2000.80.1013.0    143,940  Qrdrsvc.exe      
   05-Mar-2005  01:03  2000.80.1013.0    221,768  Replprov.dll     
   05-Mar-2005  01:03  2000.80.1013.0    307,784  Replrec.dll
   05-Mar-2005  01:03  2000.80.1013.0    287,304  Rinitcom.dll     
   05-Mar-2005  01:03  2000.80.1013.0     78,416  Sdiclnt.dll
   05-Mar-2005  01:03  2000.80.1013.0     66,112  Semmap.dll
   05-Mar-2005  01:03  2000.80.1013.0     57,916  Semnt.dll        
   05-Mar-2005  01:03  2000.80.1013.0    492,096  Semobj.dll       
   05-Mar-2005  01:03  2000.80.1013.0     53,832  Snapshot.exe     
   05-Mar-2005  01:02  2000.80.1013.0     28,672  Sqlagent.dll
   05-Mar-2005  01:03  2000.80.1013.0    311,872  Sqlagent.exe
   05-Mar-2005  01:02  2000.80.1013.0    168,001  Sqlakw32.dll     
   04-Mar-2005  23:30                      4,352  Sqlakw32.lib
   05-Mar-2005  01:03  2000.80.1013.0     33,344  Sqlctr80.dll
   05-Mar-2005  01:03  2000.80.1013.0    815,676  Sqldata.dll
   05-Mar-2005  01:03  2000.80.1013.0  4,215,360  Sqldmo.dll
   05-Mar-2005  01:03                     25,172  Sqldumper.exe
   05-Mar-2005  01:03  2000.80.1013.0    156,224  Sqlmaint.exe
   05-Mar-2005  01:03  2000.80.1013.0    180,792  Sqlmap70.dll
   05-Mar-2005  01:03  2000.80.1013.0    188,992  Sqlmmc.dll       
   05-Mar-2005  01:03  2000.80.1013.0    401,984  Sqlqry.dll
   05-Mar-2005  01:03  2000.80.1013.0     57,920  Sqlrepss.dll     
   05-Mar-2005  01:03  2000.80.1013.0  7,721,041  Sqlservr.exe
   05-Mar-2005  01:03  2000.80.1013.0    590,396  Sqlsort.dll
   05-Mar-2005  01:03  2000.80.1013.0     45,644  Sqlvdi.dll
   05-Mar-2005  01:03  2000.80.1013.0    106,588  Sqsrvres.dll
   05-Mar-2005  01:03  2000.80.1013.0     33,340  Ssmsgnet.dll
   05-Mar-2005  01:03  2000.80.1013.0     33,340  Ssmslpcn.dll     
   05-Mar-2005  01:03  2000.80.1013.0     33,340  Ssmsqlgc.dll
   05-Mar-2005  01:03  2000.80.1013.0     33,340  Ssmssnet.dll
   05-Mar-2005  01:03  2000.80.1013.0     82,492  Ssnetlib.dll
   05-Mar-2005  01:03  2000.80.1013.0     25,148  Ssnmpn70.dll
   05-Mar-2005  01:03  2000.80.1013.0    123,456  Stardds.dll
   05-Mar-2005  01:03  2000.80.1013.0    158,240  Svrnetcn.dll
   05-Mar-2005  01:03  2000.80.1013.0     76,416  Svrnetcn.exe
   05-Mar-2005  01:03  2000.80.1013.0     49,228  Ums.dll
   05-Mar-2005  01:03  2000.80.1013.0     74,304  Xplog70.dll
   05-Mar-2005  01:03  2000.80.1013.0     98,872  Xpweb70.dll
   31-Dec-2004  19:15  8.0.21213.0       352,256  Msvcr71.dll      
   31-Dec-2004  19:15  2000.80.796.0      57,904  Osql.exe         
   31-Dec-2004  19:15  2000.80.534.0     127,548  Sqdedev.dll
   31-Dec-2004  19:15  2000.80.194.0     180,290  Sqlunirl.dll     
   04-Mar-2005  23:23  2000.80.1013.0    159,813  Replres.rll
   04-Mar-2005  23:52  2000.80.1013.0    172,032  Semobj.rll
   04-Mar-2005  23:13  2000.80.1013.0     28,672  Sqlevn70.rll
   04-Mar-2005  23:41  2000.80.1013.0    479,232  Sqlmmc.rll
SQL Server 2000 64-bit version
   Date         Time   Version         Size        File name	  Platform
   ------------------------------------------------------------------------
   05-Mar-2005  09:20  2000.80.1013.0      56,832  Dbmslpcn.dll   IA-64
   05-Mar-2005  09:19  2000.80.1013.0     528,960  Dtspump.dll
   05-Mar-2005  09:20  2000.80.1013.0     185,856  Msgprox.dll    IA-64
   31-Dec-2004  19:10  8.11.41022.0       742,912  Mssdi98.dll
   05-Mar-2005  09:20  2000.80.1013.0     151,040  Odsole70.dll   IA-64
   05-Mar-2005  09:21  2000.80.1013.0      27,136  Opends60.dll   IA-64
   05-Mar-2005  01:44                      19,880  Opends60.lib
   05-Mar-2005  09:20  2000.80.1013.0     148,992  Osql.exe       IA-64
   05-Mar-2005  09:20  2000.80.1013.0     353,280  Qrdrsvc.exe
   05-Mar-2005  09:20  2000.80.1013.0     534,528  Replprov.dll
   05-Mar-2005  09:20  2000.80.1013.0     769,024  Replrec.dll
   05-Mar-2005  09:20  2000.80.1013.0     650,240  Rinitcom.dll   IA-64
   05-Mar-2005  09:20  2000.80.1013.0     160,768  Semmap.dll
   05-Mar-2005  09:20  2000.80.1013.0     132,608  Semnt.dll
   05-Mar-2005  09:20  2000.80.1013.0      88,576  Snapshot.exe   IA-64
   05-Mar-2005  09:19  2000.80.1013.0      10,240  Sqlagent.dll   IA-64
   05-Mar-2005  09:20  2000.80.1013.0   1,055,232  Sqlagent.exe   IA-64
   05-Mar-2005  09:20  2000.80.1013.0      90,112  Sqlboot.dll    IA-64
   05-Mar-2005  09:20  2000.80.1013.0      32,256  Sqlctr80.dll   IA-64
   05-Mar-2005  09:20  2000.80.1013.0     812,032  Sqldata.dll    IA-64
   05-Mar-2005  09:20  2000.80.1013.0  13,845,504  Sqldmo.dll
   05-Mar-2005  09:20                      39,936  Sqldumper.exe  
   05-Mar-2005  09:20  2000.80.1013.0     493,568  Sqlmaint.exe   IA-64
   05-Mar-2005  09:20  2000.80.1013.0      23,040  Sqlmap70.dll   IA-64
   05-Mar-2005  09:20  2000.80.1013.0     152,064  Sqlrepss.dll   
   05-Mar-2005  09:21  2000.80.1013.0  25,264,128  Sqlservr.exe   
   05-Mar-2005  09:20  2000.80.1013.0     616,960  Sqlsort.dll    
   05-Mar-2005  09:20  2000.80.1013.0     120,320  Sqlvdi.dll
   05-Mar-2005  09:20  2000.80.1013.0     227,328  Sqsrvres.dll   
   05-Mar-2005  09:20  2000.80.1013.0      53,760  Ssmslpcn.dll
   05-Mar-2005  09:20  2000.80.1013.0      59,904  Ssmsqlgc.dll
   05-Mar-2005  09:20  2000.80.1013.0     256,000  Ssnetlib.dll
   05-Mar-2005  09:20  2000.80.1013.0      20,992  Ssnmpn70.dll
   05-Mar-2005  09:20  2000.80.1013.0     430,080  Svrnetcn.dll
   05-Mar-2005  09:20  2000.80.1013.0     185,856  Svrnetcn.exe
   05-Mar-2005  09:20  2000.80.1013.0     183,296  Xplog70.dll
   05-Mar-2005  09:20  2000.80.1013.0     187,392  Xpweb70.dll     IA-64
   31-Dec-2004  19:10  2000.80.962.0       57,904  Osql.exe
   31-Dec-2004  19:10  2000.80.760.0      269,824  Sqdedev.dll
   05-Mar-2005  02:19  2000.80.1013.0     146,432  Replres.rll
   05-Mar-2005  01:45  2000.80.1013.0      19,968  Sqlevn70.rll

Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.


WORKAROUND

To work around this problem, use one or more of the following methods:
  • Perform your query against the base table instead of against the view.
  • Reduce the number of values in the IN list.
  • Reduce the number of aggregate functions.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

After you install this hotfix, you can use trace flag 221 to change the SQL Server behavior. To enable trace flag 221 so that it is turned on whenever SQL Server starts, add the trace flag as a SQL Server startup parameter. To do this, follow these steps:
  1. In SQL Server Enterprise Manager, right-click Server Name, and then click Properties.

    Note Server Name is a placeholder for the name of the server that is running SQL Server.
  2. On the General tab, click Startup Parameters.
  3. In the Parameter text box, type -T221, click Add, and then click OK.
  4. In the SQL Server Properties (Configure) - Server Name dialog box, click OK.
  5. Restart the SQL Server service for the new parameter to take effect.
Alternatively, run the following query in SQL Query Analyzer to dynamically turn on the trace flag.
DBCC TRACEON (221, -1)
However, if you do not add trace flag 221 as a SQL Server startup parameter, the effect of the DBCC TRACEON command is lost when the SQL Server service restarts.

A more efficient way to deal with large IN lists is to insert the IN list values into a temporary table. Then, remove the IN list from the query, and join the temporary table to the table.

For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:
822499 New naming schema for Microsoft SQL Server software update packages
For more information about the terminology that Microsoft uses when it corrects software after it is released, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 891866 - Last Review: November 2, 2007 - Revision: 1.7
APPLIES TO
  • Microsoft SQL Server 2000 Desktop Engine (Windows)
  • Microsoft SQL Server 2000 Developer Edition
  • Microsoft SQL Server 2000 Personal Edition
  • Microsoft SQL Server 2000 Standard Edition
  • Microsoft SQL Server 2000, Workgroup Edition
  • Microsoft SQL Server 2000 Enterprise Edition
  • Microsoft SQL Server 2000 Enterprise Edition 64-bit
Keywords: 
kbautohotfix kbfix kbbug kbhotfixserver kbqfe KB891866

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