Rollback the inner transaction of nested transaction

Question

suppose I have following sql statement in sql server 2008:

BEGIN TRANSACTION    
SqlStatement1    
EXEC sp1    
SqlStatement3
COMMIT TRANSACTION

Answer 1

Nested transactions can be used. To only rollback the inner transaction, use a savepoint and rollback to the savepoint. In case the inner transaction does not whether it is nested or not, IF statements can be used to find out whether to set a savepoint and whether to rollback or to rollback to a savepoint:

BEGIN TRAN

    DECLARE @WILL_BE_NESTED_TRANSACTION BIT = CASE WHEN (@@TRANCOUNT > 0) THEN 1 ELSE 0 END
    IF @WILL_BE_NESTED_TRANSACTION = 1
        SAVE TRAN tran_save
    BEGIN TRAN
        -- do stuff

    IF @WILL_BE_NESTED_TRANSACTION = 1
        ROLLBACK TRAN tran_save
    ELSE
        ROLLBACK

ROLLBACK