Nested procedures with transactions - stored-procedures

Question

I have the following problem. I have to stored procedures (debug messages double-indended):
CREATE PROC innerProc
AS
BEGIN
SELECT 'innerProc 1',##TRANCOUNT
BEGIN TRAN
SELECT 'innerProc 2',##TRANCOUNT
ROLLBACK
SELECT 'innerProc 3',##TRANCOUNT
END
GO -----------------------------------------
CREATE PROC outerProc
AS
BEGIN
SELECT 'outerProc 1',##TRANCOUNT
BEGIN TRAN
SELECT 'outerProc 2',##TRANCOUNT
EXEC innerProc
SELECT 'outerProc 3',##TRANCOUNT
ROLLBACK
SELECT 'outerProc 4',##TRANCOUNT
END
GO -----------------------------------------
EXEC outerProc
What they do?
outerProc begins transaction (##TRANCOUNT = 1)
executes innerProc (##TRANCOUNT at the beginning of the proc = 1)
innerProc begins another transaction (##TRANCOUNT = 2)
innerProc rollbacks transaction (##TRANCOUNT = 0)
AND HERE IS THE PROBLEM: ##TRANCOUNT at the beginning of the innerProc is not equal to ##TRANCOUNT at the end. What am I doing wrong? Is it correct approach?

Answer 1

I believe you need to use named transactions or else you're killing all transactions when you rollback on the nested one, even if it is scoped to just the inner sproc
http://msdn.microsoft.com/en-us/library/ms188929.aspx
Further reading: http://msdn.microsoft.com/en-us/library/ms181299.aspx
ROLLBACK TRANSACTION without a
savepoint_name or transaction_name
rolls back to the beginning of the
transaction. When nesting
transactions, this same statement
rolls back all inner transactions to
the outermost BEGIN TRANSACTION
statement. In both cases, ROLLBACK
TRANSACTION decrements the ##TRANCOUNT
system function to 0. ROLLBACK
TRANSACTION savepoint_name does not
decrement ##TRANCOUNT.