s?e?t? ?x?a?c?t?_?a?b?o?r?t ?用?法

时间:2014-04-28 12:55:42   收藏:0   阅读:522

默认行为

  默认为SET XACT_ABORT OFF,没有事务行为。

SET XACT_ABORT ON

  SET XACT_ABORT ON分为两种:

  1、总体作为一个事务,整体提交或整体回滚,格式为:

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SET XACT_ABORT ON
BEGIN TRAN
--要执行的语句
COMMIT TRAN
GO
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  2、每个语句作为一个事务,事务在错误行终止,错误行回滚,错误行之前的不回滚,格式为:

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SET XACT_ABORT ON
BEGIN
--要执行的语句
END
GO
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测试

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--创建测试表
use MyDB
CREATE TABLE student
(
stuid int NOT NULL PRIMARY KEY,
stuname varchar(50)
)
CREATE TABLE score
(
stuid int NOT NULL REFERENCES student(stuid),
score int
)
GO

--插入测试数据
INSERT INTO student VALUES (101,zhangsan)
INSERT INTO student VALUES (102,wangwu)
INSERT INTO student VALUES (103,lishi)
INSERT INTO student VALUES (104,maliu)
GO

---------------测试事务提交------------------
use MyDB
--只回滚错误行,语句还继续执行
SET XACT_ABORT OFF
BEGIN TRAN
INSERT INTO score VALUES (101,90)
INSERT INTO score VALUES (102,78)
INSERT INTO score VALUES (107,76) /* Foreign Key Error */
INSERT INTO score VALUES (103,81)
INSERT INTO score VALUES (104,65)
COMMIT TRAN
GO
/*
stuid score
----------- -----------
101 90
102 78
103 81
104 65

(4 row(s) affected)
*/

use MyDB
--事务终止并全部回滚
SET XACT_ABORT ON
BEGIN TRAN
INSERT INTO score VALUES (101,90)
INSERT INTO score VALUES (102,78)
INSERT INTO score VALUES (107,76) /* Foreign Key Error */
INSERT INTO score VALUES (103,81)
INSERT INTO score VALUES (104,65)
COMMIT TRAN
GO
/*
stuid score
----------- -----------
(0 row(s) affected)
*/

use MyDB
--事务在错误行终止,错误行回滚,错误行之前的不回滚
SET XACT_ABORT ON
BEGIN
INSERT INTO score VALUES (101,90)
INSERT INTO score VALUES (102,78)
INSERT INTO score VALUES (107,76) /* Foreign Key Error */
INSERT INTO score VALUES (103,81)
INSERT INTO score VALUES (104,65)
END
GO
/*
stuid score
----------- -----------
101 90
102 78
(2 row(s) affected)
*/
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