Microsoft KB Archive/840406

= FIX: Queries that join a view may run slowly if the view contains outer joins =

Article ID: 840406

Article Last Modified on 11/2/2007

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APPLIES TO


 * Microsoft SQL Server 2000 Developer Edition
 * Microsoft SQL Server 2000 Standard Edition
 * Microsoft SQL Server 2000 Enterprise Edition
 * Microsoft SQL Server 2000 Personal Edition
 * Microsoft SQL Server 2000 Enterprise Edition
 * Microsoft SQL Server 2000 Workgroup Edition
 * Microsoft SQL Server 2000 Desktop Engine (Windows)
 * Microsoft SQL Server 2000 Developer Edition
 * Microsoft SQL Server 2000 Enterprise Edition 64-bit

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Bug #: 471308 (SHILOH_BUGS)



SYMPTOMS
If you have a query that joins a view, and the view contains outer joins, the query may run slowly.



CAUSE
This problem occurs because the Microsoft SQL Server query optimizer does not produce certain join orders that may be more efficient during the query plan optimization.



Service pack information
To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2000. For more information, 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

Hotfix information
The English version of this hotfix has the file attributes (or later) 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.   Date         Time   Version             Size   File name -  31-May-2003  16:45  2000.80.818.0      78,400  Console.exe 25-Mar-2004 20:27  2000.80.928.0     315,968  Custtask.dll 30-Jan-2004 14:29  2000.80.911.0      33,340  Dbmslpcn.dll 25-Apr-2003 00:12                    786,432  Distmdl.ldf 25-Apr-2003 00:12                  2,359,296  Distmdl.mdf 29-Jan-2003 23:55                        180  Drop_repl_hotfix.sql 12-Sep-2003 01:26  2000.80.859.0   1,905,216  Dtspkg.dll 26-Aug-2003 18:16  2000.80.854.0     528,960  Dtspump.dll 23-Jun-2003 20:40  2000.80.837.0   1,557,052  Dtsui.dll 23-Jun-2003 20:40  2000.80.837.0     639,552  Dtswiz.dll 24-Apr-2003 00:51                    747,927  Instdist.sql 02-May-2003 23:56                      1,581  Inst_repl_hotfix.sql 30-Jan-2004 14:29  2000.80.911.0      90,692  Msgprox.dll 01-Apr-2003 00:07                      1,873  Odsole.sql 30-Jan-2004 14:29  2000.80.911.0      62,024  Odsole70.dll 30-Jan-2004 14:29  2000.80.911.0      25,144  Opends60.dll 30-Jan-2004 14:29  2000.80.911.0      57,904  Osql.exe 02-Apr-2003 21:15  2000.80.797.0     279,104  Pfutil80.dll 04-Aug-2003 16:17                    550,780  Procsyst.sql 11-Sep-2003 22:37                     12,305  Qfe469315.sql 22-May-2003 20:57                     19,195  Qfe469571.sql 25-Mar-2004 19:03                  1,104,848  Replmerg.sql 30-Jan-2004 14:29  2000.80.911.0     221,768  Replprov.dll 30-Jan-2004 14:29  2000.80.911.0     307,784  Replrec.dll 29-Jan-2004 21:24  2000.80.911.0     159,813  Replres.rll 05-Sep-2003 22:00                  1,087,150  Replsys.sql 13-Aug-2003 14:28                    986,603  Repltran.sql 30-Jan-2004 14:29  2000.80.911.0     287,304  Rinitcom.dll 25-Mar-2004 20:27  2000.80.928.0      66,112  Semmap.dll 30-Jan-2004 14:29  2000.80.911.0      57,916  Semnt.dll 29-Jul-2003 18:13  2000.80.819.0     492,096  Semobj.dll 31-May-2003 16:27  2000.80.818.0     172,032  Semobj.rll 02-Jan-2004 17:42  2000.80.904.0      53,832  Snapshot.exe 09-Dec-2003 18:07                    117,834  Sp3_serv_uni.sql 04-Feb-2004 22:46  2000.80.913.0      28,672  Sqlagent.dll 04-Feb-2004 22:47  2000.80.913.0     311,872  Sqlagent.exe 19-Feb-2004 16:02  2000.80.916.0     168,001  Sqlakw32.dll 12-Mar-2004 02:34  2000.80.923.0      33,344  Sqlctr80.dll 30-Jan-2004 14:29  2000.80.911.0   4,215,360  Sqldmo.dll 07-Apr-2003 15:44                     25,172  Sqldumper.exe 29-Jan-2004 21:17  2000.80.911.0      28,672  Sqlevn70.rll 05-Mar-2004 15:13  2000.80.922.0     180,792  Sqlmap70.dll 03-Sep-2003 00:56  2000.80.857.0     188,992  Sqlmmc.dll 02-Sep-2003 21:03  2000.80.857.0     479,232  Sqlmmc.rll 21-Oct-2003 22:08  2000.80.871.0     401,984  Sqlqry.dll 30-Jan-2004 14:29  2000.80.911.0      57,920  Sqlrepss.dll 13-Apr-2004 17:31  2000.80.933.0   7,626,833  Sqlservr.exe 30-Jan-2004 14:29  2000.80.911.0     590,396  Sqlsort.dll 30-Jan-2004 14:29  2000.80.911.0      45,644  Sqlvdi.dll 30-Jan-2004 14:29  2000.80.911.0     106,588  Sqsrvres.dll 30-Jan-2004 14:29  2000.80.911.0      33,340  Ssmslpcn.dll 30-Jan-2004 14:29  2000.80.911.0      82,492  Ssnetlib.dll 30-Jan-2004 14:29  2000.80.911.0      25,148  Ssnmpn70.dll 28-Oct-2003 02:21  2000.80.873.0     123,456  Stardds.dll 30-Jan-2004 14:29  2000.80.911.0     158,240  Svrnetcn.dll 30-Jan-2004 14:29  2000.80.911.0      76,416  Svrnetcn.exe 30-Apr-2003 21:52  2000.80.816.0      45,132  Ums.dll 30-Jan-2004 14:29  2000.80.911.0      98,872  Xpweb70.dll Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.



MORE INFORMATION
After you apply this hotfix, you must enable trace flag 9052 for the fix to take effect. To do this, follow these steps:
 * 1) Start SQL Server Enterprise Manager.
 * 2) Right-click the instance of SQL Server, and then click Properties.
 * 3) Click the General tab, and then click Startup Parameters.
 * 4) In the Startup Parameters dialog box, type -T9052 in the Parameter box.
 * 5) Click Add, and then click OK.
 * 6) In the SQL Server Properties dialog box, click OK.
 * 7) Restart SQL Server.

Note You can also dynamically enable the trace flag by running the dbcc traceon(9052,-1) command. If you run this command, you do not have to restart SQL Server. However, you must run this command every time that you restart SQL Server.

Keywords: kbbug kbfix kbqfe kbsqlserv2000presp4fix kbhotfixserver KB840406

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