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SQL Server Forum - LearnItFirst.com » Transact-SQL Programming » DML (SELECT, INSERT, UPDATE, DELETE) Questions » Problem COMMIT with MARS connections enable (ODBC)

Problem COMMIT with MARS connections enable (ODBC)

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Yan302

Posted: Friday, March 27, 2009 5:08:08 AM

Rank: Newbie

Joined: 3/27/2009
Posts: 1
Points: 3

Hi all,

I've got trouble using commit with MARS connection enable.
Here is my steps :

1° Wink

Connection :
connectString = Driver={SQL Native Client};Server=BROL\SQLEXPRESS; Database=test;Trusted_Connection=Yes;MARS_Connection=Yes;"

SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &ODBCenv)
SQLSetEnvAttr(ODBCenv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER *)SQL_OV_ODBC3, 0);
SQLAllocHandle(SQL_HANDLE_DBC, ODBCenv, &ODBCcon)
SQLDriverConnect(ODBCcon, NULL, connectString, SQL_NTS, NULL, 0, NULL, SQL_DRIVER_NOPROMPT)

2° Wink

set implicit_transaction to ON :
SQLExecDirect(stmt, "SET IMPLICIT_TRANSACTIONS ON", strlen("SET IMPLICIT_TRANSACTIONS ON" Wink

)

3°

Alloc, prepare and bind for an insert statement :
SQLAllocHandle(SQL_HANDLE_STMT, ODBCcon,&(curs->stmt)
SQLPrepare(curs->stmt, curs->str, strlen(curs->str)
[some bind]

4° Wink

Then execute :
SQLExecute(curs->stmt)

No problem/error until that point.

5° Wink

Want to commit :
SQLExecDirect(stmt, "COMMIT", strlen("COMMIT" Wink

)

And there I got the error :
"The COMMIT TRANSACTION request has no corresponding BEGIN TRANSACTION."

But in fact, a begin transaction should not be present while IMPLICIT_TRANSACTION is set to ON. If I remove the option "Mars Connection" from the connection string ; I don't have the problem anymore but I need this option.

Someone got any idea ?

Thanks,

Yan302

Scott Whigham

Posted: Monday, March 30, 2009 10:59:37 AM

Rank: Super Mod

Joined: 3/20/2006
Posts: 460
Points: 1,002
Where do you live?: Dallas, TX

Have you used Profiler to verify that your code is getting executed in the order you think it is?

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