Article ID: 892935
Article Last Modified on 6/1/2006
APPLIES TO
- Microsoft SQL Server 2000 Standard Edition
- Microsoft SQL Server 2000 Desktop Engine (Windows)
- Microsoft SQL Server 2000 Developer Edition
- Microsoft SQL Server 2000 Enterprise Edition
- Microsoft SQL Server 2000 Developer Edition
- Microsoft SQL Server 2000 64-bit Edition
Bug #: 473533 (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.
SYMPTOMS
When you join local partitioned views with a table in Microsoft SQL Server 2000, SQL Server produces an inefficient query execution plan. The inefficient query execution plan causes poor performance. See the More Information section underneath for a demonstration of reducing the partition view to select from only the relevant partition table.
For a list of previous hotfixes, see the "Microsoft SQL Server 2000 post-Service Pack 3 or Microsoft SQL Server 2000 post-Service Pack 3a hotfixes" section in the following Microsoft Knowledge Base article:
290211 How to obtain the latest SQL Server 2000 service pack
CAUSE
This problem occurs when table scans are performed on very large tables that contain millions of rows. The query execution plan causes poor query performance.
RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next SQL Server 2000 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Prerequisites
You must install SQL Server 2000 Service Pack 3a. For more information about how to obtain SQL Server 2000 Service Pack 3, 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
Additionally, this hotfix requires that you also have SQL Server 2000 hotfix build 2000.80.977 installed. For more information about SQL Server 2000 Post SP3a hotfix build 2000.80.977, click the following article number to view the article in the Microsoft Knowledge Base:
888007 You receive a "The product does not have a prerequisite update installed" error message when you try to install a SQL Server 2000 post-S888007 hotfix
Restart information
You do not have restart the computer after you apply this hotfix.
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 ----------------------------------------------------------- 21-Jan-2005 21:36 2000.80.1003.0 664,128 Autoplt.dll 21-Jan-2005 21:36 2000.80.1003.0 78,400 Console.exe 21-Jan-2005 21:36 2000.80.1003.0 332,352 Ctasksui.dll 21-Jan-2005 21:36 2000.80.1003.0 315,968 Custtask.dll 21-Jan-2005 21:36 2000.80.1003.0 33,340 Dbmslpcn.dll 21-Jan-2005 21:36 2000.80.1003.0 1,905,216 Dtspkg.dll 21-Jan-2005 21:36 2000.80.1003.0 528,960 Dtspump.dll 21-Jan-2005 21:36 2000.80.1003.0 41,536 Dtsrun.exe 21-Jan-2005 21:36 2000.80.1003.0 1,557,052 Dtsui.dll 21-Jan-2005 21:36 2000.80.1003.0 639,552 Dtswiz.dll 21-Jan-2005 21:36 2000.80.1003.0 352,828 Isqlw.exe 21-Jan-2005 21:36 2000.80.1003.0 82,492 Itwiz.exe 21-Jan-2005 21:36 2000.80.1003.0 90,692 Msgprox.dll 31-Dec-2004 19:16 8.11.41022.0 226,304 Mssdi98.dll 21-Jan-2005 21:36 2000.80.1003.0 62,024 Odsole70.dll 21-Jan-2005 21:37 2000.80.1003.0 25,144 Opends60.dll 21-Jan-2005 21:23 17,576 Opends60.lib 21-Jan-2005 21:36 2000.80.1003.0 57,904 Osql.exe 21-Jan-2005 21:36 2000.80.1003.0 279,104 Pfutil80.dll 21-Jan-2005 21:36 2000.80.1003.0 143,940 Qrdrsvc.exe 21-Jan-2005 21:36 2000.80.1003.0 221,768 Replprov.dll 21-Jan-2005 21:36 2000.80.1003.0 307,784 Replrec.dll 21-Jan-2005 21:36 2000.80.1003.0 287,304 Rinitcom.dll 21-Jan-2005 21:36 2000.80.1003.0 78,416 Sdiclnt.dll 21-Jan-2005 21:36 2000.80.1003.0 66,112 Semmap.dll 21-Jan-2005 21:36 2000.80.1003.0 57,916 Semnt.dll 21-Jan-2005 21:36 2000.80.1003.0 492,096 Semobj.dll 21-Jan-2005 21:36 2000.80.1003.0 53,832 Snapshot.exe 21-Jan-2005 21:35 2000.80.1003.0 28,672 Sqlagent.dll 21-Jan-2005 21:36 2000.80.1003.0 311,872 Sqlagent.exe 21-Jan-2005 21:35 2000.80.1003.0 168,001 Sqlakw32.dll 21-Jan-2005 19:28 4,352 Sqlakw32.lib 21-Jan-2005 21:36 2000.80.1003.0 33,344 Sqlctr80.dll 21-Jan-2005 21:36 2000.80.1003.0 815,676 Sqldata.dll 21-Jan-2005 21:36 2000.80.1003.0 4,215,360 Sqldmo.dll 21-Jan-2005 21:36 25,172 Sqldumper.exe 21-Jan-2005 21:36 2000.80.1003.0 156,224 Sqlmaint.exe 21-Jan-2005 21:36 2000.80.1003.0 180,792 Sqlmap70.dll 21-Jan-2005 21:36 2000.80.1003.0 188,992 Sqlmmc.dll 21-Jan-2005 21:36 2000.80.1003.0 401,984 Sqlqry.dll 21-Jan-2005 21:36 2000.80.1003.0 57,920 Sqlrepss.dll 21-Jan-2005 21:36 2000.80.1003.0 7,721,041 Sqlservr.exe 21-Jan-2005 21:36 2000.80.1003.0 590,396 Sqlsort.dll 21-Jan-2005 21:36 2000.80.1003.0 45,644 Sqlvdi.dll 21-Jan-2005 21:36 2000.80.1003.0 106,588 Sqsrvres.dll 21-Jan-2005 21:36 2000.80.1003.0 33,340 Ssmsgnet.dll 21-Jan-2005 21:36 2000.80.1003.0 33,340 Ssmslpcn.dll 21-Jan-2005 21:36 2000.80.1003.0 33,340 Ssmsqlgc.dll 21-Jan-2005 21:36 2000.80.1003.0 33,340 Ssmssnet.dll 21-Jan-2005 21:36 2000.80.1003.0 82,492 Ssnetlib.dll 21-Jan-2005 21:36 2000.80.1003.0 25,148 Ssnmpn70.dll 21-Jan-2005 21:36 2000.80.1003.0 123,456 Stardds.dll 21-Jan-2005 21:36 2000.80.1003.0 158,240 Svrnetcn.dll 21-Jan-2005 21:36 2000.80.1003.0 76,416 Svrnetcn.exe 21-Jan-2005 21:37 2000.80.1003.0 49,228 Ums.dll 21-Jan-2005 21:36 2000.80.1003.0 74,304 Xplog70.dll 21-Jan-2005 21:36 2000.80.1003.0 98,872 Xpweb70.dll 21-Jan-2005 21:39 6,473 Hotfix1.inf 21-Jan-2005 21:39 2,524 Hotfix2.inf 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 21-Jan-2005 19:24 2000.80.1003.0 159,813 Replres.rll 21-Jan-2005 21:25 2000.80.1003.0 172,032 Semobj.rll 21-Jan-2005 19:17 2000.80.1003.0 28,672 Sqlevn70.rll 21-Jan-2005 19:38 2000.80.1003.0 479,232 Sqlmmc.rll
SQL Server 2000, 64 bit version
Date Time Version Size File name Platform --------------------------------------------------------------------- 22-Jan-2005 05:12 2000.80.1003.0 56,832 Dbmslpcn.dll 22-Jan-2005 05:11 2000.80.1003.0 528,960 Dtspump.dll 22-Jan-2005 05:12 2000.80.1003.0 185,856 Msgprox.dll IA-64 31-Dec-2004 19:10 8.11.41022.0 742,912 Mssdi98.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 151,040 Odsole70.dll IA-64 22-Jan-2005 05:13 2000.80.1003.0 27,136 Opends60.dll IA-64 21-Jan-2005 21:46 19,880 Opends60.lib 22-Jan-2005 05:12 2000.80.1003.0 148,992 Osql.exe IA-64 22-Jan-2005 05:12 2000.80.1003.0 353,280 Qrdrsvc.exe IA-64 22-Jan-2005 05:12 2000.80.1003.0 534,528 Replprov.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 769,024 Replrec.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 650,240 Rinitcom.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 160,768 Semmap.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 132,608 Semnt.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 88,576 Snapshot.exe IA-64 22-Jan-2005 05:11 2000.80.1003.0 10,240 Sqlagent.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 1,055,232 Sqlagent.exe 22-Jan-2005 05:12 2000.80.1003.0 90,112 Sqlboot.dll 22-Jan-2005 05:12 2000.80.1003.0 32,256 Sqlctr80.dll 22-Jan-2005 05:12 2000.80.1003.0 812,032 Sqldata.dll 22-Jan-2005 05:12 2000.80.1003.0 13,845,504 Sqldmo.dll IA-64 22-Jan-2005 05:12 39,936 Sqldumper.exe 22-Jan-2005 05:12 2000.80.1003.0 493,568 Sqlmaint.exe 22-Jan-2005 05:12 2000.80.1003.0 23,040 Sqlmap70.dll 22-Jan-2005 05:12 2000.80.1003.0 152,064 Sqlrepss.dll IA-64 22-Jan-2005 05:13 2000.80.1003.0 25,266,688 Sqlservr.exe 22-Jan-2005 05:12 2000.80.1003.0 616,960 Sqlsort.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 120,320 Sqlvdi.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 227,328 Sqsrvres.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 53,760 Ssmslpcn.dll 22-Jan-2005 05:12 2000.80.1003.0 59,904 Ssmsqlgc.dll 22-Jan-2005 05:12 2000.80.1003.0 256,000 Ssnetlib.dll 22-Jan-2005 05:12 2000.80.1003.0 20,992 Ssnmpn70.dll 22-Jan-2005 05:12 2000.80.1003.0 430,080 Svrnetcn.dll 22-Jan-2005 05:12 2000.80.1003.0 185,856 Svrnetcn.exe 22-Jan-2005 05:12 2000.80.1003.0 183,296 Xplog70.dll IA-64 22-Jan-2005 05:12 2000.80.1003.0 187,392 Xpweb70.dll IA-64 22-Jan-2005 05:15 5,065 Hotfix1.inf 31-Dec-2004 19:10 2000.80.962.0 57,904 Osql.exe x86 31-Dec-2004 19:10 2000.80.760.0 269,824 Sqdedev.dll 21-Jan-2005 22:00 2000.80.1003.0 146,432 Replres.rll 21-Jan-2005 21:47 2000.80.1003.0 19,968 Sqlevn70.rll
Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.
STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
The following code is a demonstration to reduce the partition view to select from only the relevant partition table:
Example: SELECT * FROM ( SELECT i.TxVal AS TxVal, 1 AS CntClick, c.[DateTime] AS DateTimeStart, ti.DateTimeEnd AS DateTimeComplete, i.[DateTime] AS MeasureDateTimeComplete FROM dbo.VW_Clicks c INNER JOIN dbo.TxImprint ti ON (c.ClickID = ti.ClickID) INNER JOIN dbo.VW_Imprint i ON (ti.TxImprintID = i.ID) WHERE c.UserID IS NOT NULL ) t1 WHERE t1.DateTimeStart BETWEEN '20041001 09:00:00' AND '20041008 10:00:00' AND t1.DateTimeComplete BETWEEN '20041001 09:00:00' AND '20041008 10:00:00' AND t1.MeasureDateTimeComplete BETWEEN '20041001 09:00:00' AND '20041008 10:00:00'
The data is partitioned by year and by month, and dbo.VW_Clicks and dbo.VW_Imprint are the partitioning views. The execution plan shows that the correct partition table is chosen. However, a table scan is used to collect the data from the underlying tables:
StmtText
Compute Scalar(DEFINE:([Clicks_20041001_20041101].[DateTime]=[Clicks_20041001_20041101].[DateTime]))
|--Compute Scalar(DEFINE:([Impressions_20041001_20041101].[DateTime]=[Impressions_20041001_20041101].[DateTime], [Impressions_20041001_20041101]. [TxVal]=[Impressions_20041001_20041101].[TxVal]))
|--Hash Match(Inner Join, HASH:([ti].[TxImprintID])=([Impressions_20041001_20041101].[ID]), RESIDUAL:([ti].[TxImprintID]=[Impressions_20041001_20041101].[ID]))
|--Hash Match(Inner Join, HASH:([ti].[ClickID])=([Clicks_20041001_20041101].[ClickID]), RESIDUAL:([ti].[ClickID]=[Clicks_20041001_20041101].[ClickID]))
| |--Clustered Index Seek(OBJECT:([Repro_LPV].[dbo].[TxImprint].[PK_TxImprint] AS [ti]), SEEK:([ti].[DateTimeEnd] >= 'Oct 1 2004 9:00AM' AND [ti].[DateTimeEnd] <= 'Oct 8 2004 10:00AM') ORDERED FORWARD)
| |--Table Scan(OBJECT:([Repro_LPV].[dbo].[Clicks_20041001_20041101]), WHERE:(([Clicks_20041001_20041101].[UserID]<>NULL AND [Clicks_20041001_20041101].[DateTime]>='Oct 1 2004 9:00AM') AND [Clicks_20041001_20041101].[DateTime]<='Oct 8 2004 10:00AM'))
|--Table Scan(OBJECT:([Repro_LPV].[dbo].[Impressions_20041001_20041101]), WHERE:([Impressions_20041001_20041101].[DateTime]>='Oct 1 2004 9:00AM' AND [Impressions_20041001_20041101].[DateTime]<='Oct 8 2004 10:00AM'))
If you change the partitioning views so that they only select from the single partition tables by using only one select statement left, no union all, the execution plan is different. It now uses NL joins, index seeks, and filters instead of using hash match and table scans:
StmtText
Parallelism(Gather Streams)
|--Filter(WHERE:([Impressions_20041001_20041101].[DateTime]>='Oct 1 2004 9:00AM' AND [Impressions_20041001_20041101].[DateTime]<='Oct 8 2004 10:00AM'))
|--Bookmark Lookup(BOOKMARK:([Bmk1003]), OBJECT:([Repro_LPV].[dbo].[Impressions_20041001_20041101]))
|--Nested Loops(Inner Join, OUTER REFERENCES:([ti].[TxImprintID]) WITH PREFETCH)
|--Filter(WHERE:(([Clicks_20041001_20041101].[UserID]<>NULL AND [Clicks_20041001_20041101].[DateTime]>='Oct 1 2004 9:00AM') AND [Clicks_20041001_20041101].[DateTime]<='Oct 8 2004 10:00AM'))
||--Bookmark Lookup(BOOKMARK:([Bmk1000]), OBJECT:([Repro_LPV].[dbo].[Clicks_20041001_20041101]))
||--Nested Loops(Inner Join, OUTER REFERENCES:([ti].[ClickID]) WITH PREFETCH)
||--Sort(ORDER BY:([ti].[ClickID] ASC))
| ||--Clustered Index Seek(OBJECT:([Repro_LPV].[dbo].[TxImprint].[PK_TxImprint] AS [ti]), SEEK:([ti].[DateTimeEnd] >= 'Oct 1 2004 9:00AM' AND [ti].[DateTimeEnd] <= 'Oct 8 2004 10:00AM') ORDERED FORWARD)
||--Index Seek(OBJECT:([Repro_LPV].[dbo].[Clicks_20041001_20041101].[ID_Clicks_20041001_20041101]), SEEK:([Clicks_20041001_20041101].[ClickID]=[ti].[ClickID]) ORDERED FORWARD)
|--Index Seek(OBJECT:([Repro_LPV].[dbo].[Impressions_20041001_20041101].[ID_Impressions_20041001_20041101]), SEEK:([Impressions_20041001_20041101].[ID]=[ti].[TxImprintID]) ORDERED FORWARD)
For more information about the naming schema for Microsoft 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 the software 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
Keywords: kbbug kbfix kbqfe kbhotfixserver KB892935