Microsoft KB Archive/136371

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BUG: Default of @@DBTS Causes Access Violation When Using BCP

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Q136371

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The information in this article applies to:


 * Microsoft SQL Server version 6.0

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BUG# NT: 11327 (4.21a)

SYMPTOMS
When you use use @@DBTS as a default bound to a column that is defined as varbinary (8), the server receives an access violation:

Msg 0, level 19, state 0: Server, line 1: language_exec:

process 9 generated access violation; SQL Server is terminating this

process Operating-system error: ConnectionWrite(WriteFile).

DB-LIBRARY error: possible network error: error in sending

out-of-band data to SQL server Connection broken" when attempting to

BCP data in.

WORKAROUND
  On SQL Server version 4.21a, you can avoid the problem by using a datatype of timestamp, then update the table to populate the timestamp field with:

     UPDATE mytable SET field1 = field1 WHERE timestamp = NULL   On SQL Server version 6.0, you can avoid the problem by creating a table using the identity constraint. This example creates a table called mytable with two columns. The identity column will start at number one and increment by one each time a row is added.

     CREATE TABLE mytable (idcol INT IDENTITY (1,1), name VARCHAR (10)) 

STATUS
Microsoft has confirmed this to be a problem in SQL Server versions 4.21a and 6.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION
The following script causes a handled access violation in SQL Server version 6.0:

  Set the database to pubs.

 create table testbcp (dt binary (8), str1 char (10), str2 char (10)) go create default dtdef as @@DBTS go sp_bindefault dtdef, "testbcp.dt" go use master go sp_dboption pubs, "select into/bulkcopy", true go use pubs go checkpoint   create a data file called c:\data.dat similar to:

     row1col2,row1col3

row2col2,row2col3

and a format file called c:\data.fmt similar to the following:

  6.0 3  1   SQLCHAR   0   0   ""      1 dummy 2  SQLCHAR   0   10   ","      2 str1 3  SQLCHAR    0   10   "\r\n"            3 str2

  BCP the data in by going to a command prompt and typing:

"bcp pubs..testbcp in c:\data.dat /f c:\format.fmt /Usa /P"

Immediately after executing the bcp command, the server receives an access violation. </li></ol>

Additional query words: SQL6 av

Keywords : kbprogramming

Issue type :

Technology : kbSQLServSearch kbAudDeveloper kbSQLServ600