FIX: An Access Violation Occurs if an sp_cursoropen Call References a Parameter That Is Not Defined

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BUG #: 363090 (SHILOH_BUGS)
SYMPTOMS
If an sp_cursoropen call references a parameter that is not defined, the server raises a handled access violation in CExecParam::Init. The query may look similar to the following query:
exec sp_cursoropen @P1 output,      N'SELECT * FROM tbl WHERE somecolumn = @P5',      @P2 output, @P3 output, @P4 output
Note The query includes an @P5 parameter, but the type and value of the parameter are not provided.

The following stack is similar to the stack that is recorded in the SQL Server error log:
* Short Stack Dump* 005DBD40 Module(sqlservr+001DBD40) (CExecParam::Init+00000006)* 005DC162 Module(sqlservr+001DC162) (CParamExchange::InsertParam+0000001B)* 00584715 Module(sqlservr+00184715) (CSPCursorOpenParams::CreateExecSqlPxp+0000016C)* 00581FD0 Module(sqlservr+00181FD0) (SPCursor::Open+000000C6)* 005E4CDE Module(sqlservr+001E4CDE) (CSpecProc::ExecuteSpecial+00000080)* 005E49B6 Module(sqlservr+001E49B6) (CXProc::Execute+000000A3)* 005E6BB4 Module(sqlservr+001E6BB4) (CSQLSource::Execute+0000037B)* 00429DD3 Module(sqlservr+00029DD3) (execrpc+000004CB)* 0042904D Module(sqlservr+0002904D) (execute_rpc+00000019)* 00410FCE Module(sqlservr+00010FCE) (process_commands+00000210)* 41073379 Module(UMS+00003379) (ProcessWorkRequests+0000024A)* 41073071 Module(UMS+00003071) (ThreadStartRoutine+000000BD)* 7800C9EB Module(MSVCRT+0000C9EB) (beginthread+000000CE)* 77E96523 Module(KERNEL32+00016523) (TlsSetValue+00000115)
Note This stack is from Sqlservr.exe build 534.
RESOLUTION

Service pack information

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

The following fix is hotfix build 701. It can only be applied to SQL Server 2000 Service Pack 2 (SP2).
   Date         Time   Version              Size  File name   -------------------------------------------------------------------   30-Aug-2002  21:08                    786,432  Distmdl.ldf   30-Aug-2002  21:08                  2,359,296  Distmdl.mdf   09-Oct-2002  00:54                        544  Drop_repl_hotfix.sql   02-Jul-2002  15:35  2000.80.650.0     107,088  Impprov.dll         19-Jul-2002  16:56                    774,516  Instdist.sql   08-Oct-2002  23:56                     12,615  Inst_repl_hotfix.sql   20-Aug-2002  16:24  2000.80.679.0     111,172  Logread.exe         07-Apr-2002  02:08  2000.80.606.0      62,024  Odsole70.dll        03-Jan-2002  01:59                     18,185  Qfe356326.sql   20-Aug-2002  16:47  2000.80.679.0     135,748  Qrdrsvc.exe         26-Aug-2002  22:49  2000.80.679.0     406,088  Rdistcom.dll        04-Oct-2001  01:36                    437,302  Replcom.sql   20-Aug-2002  16:33  2000.80.679.0     152,136  Replmerg.exe        19-Nov-2001  20:36                    993,945  Replmerg.sql   05-Nov-2002  23:48  2000.80.700.0     221,768  Replprov.dll        04-Oct-2001  01:36                    986,906  Replsys.sql   04-Oct-2001  01:36                    881,228  Repltran.sql   26-Aug-2002  22:49  2000.80.679.0     283,208  Rinitcom.dll        16-Sep-2002  22:31                    390,045  Securityhotfix.sql   26-Aug-2002  22:49  2000.80.679.0      28,672  Sqlagent.dll        26-Aug-2002  18:39  2000.80.679.0     311,872  Sqlagent.exe        28-Aug-2002  16:32  2000.80.679.0      49,152  Sqlagent.rll   26-Aug-2002  22:49  2000.80.679.0      53,824  Sqlcmdss.dll        28-Aug-2002  16:40  2000.80.679.0      12,288  Sqlcmdss.rll   24-Oct-2002  17:37  2000.80.695.0     176,696  Sqlmap70.dll        08-Nov-2002  00:49  2000.80.701.0   7,471,188  Sqlservr.exe        01-Nov-2002  18:56  2000.80.698.0      45,644  Sqlvdi.dll          01-Nov-2002  18:00  2000.80.697.0      82,492  Ssnetlib.dll        07-Apr-2002  02:08  2000.80.606.0      70,208  Xplog70.dll         07-Apr-2002  02:08  2000.80.606.0      53,828  Xpqueue.dll         07-Apr-2002  02:08  2000.80.606.0     156,228  Xprepl.dll          12-Jul-2002  01:00  2000.80.658.0     279,104  Xpstar.dll          16-Sep-2002  23:12  2000.80.686.0      98,872  Xpweb70.dll

A separate fix (build 8.00.0765) that addresses this problem in SQL Server 2000 SP3 is available.
   Date         Time   Version              Size  File name   -------------------------------------------------------------------   08-Feb-2003  05:43                    786,432  Distmdl.ldf   08-Feb-2003  05:43                  2,359,296  Distmdl.mdf   30-Jan-2003  01:55                        180  Drop_repl_hotfix.sql   01-Feb-2003  00:32  2000.80.763.0   1,557,052  Dtsui.dll           30-Jan-2003  05:18                    746,470  Instdist.sql   30-Jan-2003  01:55                      1,402  Inst_repl_hotfix.sql   08-Feb-2003  06:40  2000.80.765.0      90,692  Msgprox.dll         08-Feb-2003  03:53                  1,065,895  Replmerg.sql   08-Feb-2003  06:40  2000.80.765.0     221,768  Replprov.dll        08-Feb-2003  06:40  2000.80.765.0     307,784  Replrec.dll         30-Jan-2003  05:18                  1,084,318  Replsys.sql   08-Feb-2003  06:40  2000.80.765.0     176,696  Sqlmap70.dll        08-Feb-2003  06:40  2000.80.765.0      57,920  Sqlrepss.dll        08-Feb-2003  06:41  2000.80.765.0   7,528,529  Sqlservr.exe        08-Feb-2003  06:40  2000.80.765.0      45,644  Sqlvdi.dll          08-Feb-2003  06:40  2000.80.765.0      82,492  Ssnetlib.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 "Applies to" section.This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.
MORE INFORMATION
This problem only occurs with malformed queries. The fix for the problem is to throw an error that indicates that the sp_cursoropen call is not well formed, instead of causing an access violation.
Properties

Article ID: 810163 - Last Review: 02/27/2014 18:42:53 - Revision: 10.4

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, Workgroup Edition, Microsoft SQL Server 2000 Desktop Engine (Windows), Microsoft SQL Server 2000 Enterprise Edition 64-bit

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