Transaction Save Point (SET XACT_ABORT { ON | OFF })

 

ref:http://blog.csdn.net/wym3587/article/details/6940630

ref:http://www.cnblogs.com/jiajiayuan/archive/2011/07/13/2105398.html

 

当 SET XACT_ABORT 为 OFF 时，有时只回滚产生错误的 Transact-SQL 语句，而事务将继续进行处理。如果错误很严重，那么即使 SET XACT_ABORT 为 OFF，也可能回滚整个事务。OFF 是默认设置。

success code:

print @@trancount

begin tran

SET XACT_ABORT off

	CREATE TABLE ValueTable ([value] int)

	save transaction sp1

	begin try

			INSERT INTO ValueTable VALUES(1);

				--begin try

				--INSERT INTO ValueTable VALUES('ok');

				--end try

				--begin catch

				Raiserror('eeee',16,1)

				--end catch

	end try

	begin catch

	 select @@trancount

	 rollback transaction sp1

	end catch

commit

DROP TABLE ValueTable;

　　

failure code because error is so serious :

print @@trancount

begin tran

SET XACT_ABORT off

	CREATE TABLE ValueTable ([value] int)

	save transaction sp1

	begin try

			INSERT INTO ValueTable VALUES(1);

				begin try

				INSERT INTO ValueTable VALUES('ok');

				end try

				begin catch

				Raiserror('eeee',16,1)

				end catch

	end try

	begin catch

	 select @@trancount

	 rollback transaction sp1

	end catch

commit

DROP TABLE ValueTable;



Output Message:

0



(1 row(s) affected)



(0 row(s) affected)



(1 row(s) affected)

Msg 3931, Level 16, State 1, Line 19

The current transaction cannot be committed and cannot be rolled back to a savepoint. Roll back the entire transaction.

　　

 So, in catch block, we should rollbacck entire tran when(XACT_STATE()) = -1:

BEGIN CATCH

    -- Test XACT_STATE for 0, 1, or -1.

    -- If 1, the transaction is committable.

    -- If -1, the transaction is uncommittable and should 

    --     be rolled back.

    -- XACT_STATE = 0 means there is no transaction and

    --     a commit or rollback operation would generate an error.



    -- Test whether the transaction is uncommittable.

    IF (XACT_STATE()) = -1

    BEGIN

        PRINT 'The transaction is in an uncommittable state.' +

              ' Rolling back transaction.'

        ROLLBACK TRANSACTION;

    END;



    -- Test whether the transaction is active and valid.

    IF (XACT_STATE()) = 1

    BEGIN

        PRINT 'The transaction is committable.' + 

              ' Committing transaction.'

        COMMIT TRANSACTION;   

    END;

END CATCH;