Mysql 儲存過程的事務使用

一.建立表語句

delimiter $$

create
table
ifnot
exists spe_transaction_tab1 (
id int(11
)primary
keyauto_increment
notnull
,`name`
varchar(5
)null
,  age int(3
)null
,  created datetime(0
)null
)$$create
table
ifnot
exists spe_transaction_tab2 (
id int(11
)primary
keyauto_increment
notnull
,`name`
varchar(5
)null
,  age int(3
)null
,  created datetime(0
)null
)$$delimiter
;

2.1 無新增任務事務

delimiter $$

drop
procedure
ifexists
`proc_transaction_test`$$
create
procedure
`proc_transaction_test`()
begin
insert
into spe_transaction_tab1 (
`name`
,age,created)
values
('張三111111111111張三張三張三張三',12
,now()
);insert
into spe_transaction_tab2 (
`name`
,age,created)
values
('張三2',12
,now()
);end$$
delimiter
;

> 1406 - data too long for column 'name' at row 1

mysql> select * from spe_transaction_tab1 ;

empty set (0.00 sec)

mysql> select * from spe_transaction_tab2 ;

empty set (0.00 sec)

2.2 無新增任務事務

delimiter $$

drop
procedure
ifexists
`proc_transaction_test`$$
create
procedure
`proc_transaction_test`()
begin
insert
into spe_transaction_tab2 (
`name`
,age,created)
values
('張三2',12
,now()
);insert
into spe_transaction_tab1 (
`name`
,age,created)
values
('張三111111111111張三張三張三張三',12
,now()
);end$$
delimiter
;

> 1406 - data too long for column 'name' at row 1

database changed

mysql> select * from spe_transaction_tab1 ;
empty set (0.00 sec)
mysql> select * from spe_transaction_tab2 ;
+----+---------+------+---------------------+
| id | name | age | created |
+----+---------+------+---------------------+
| 1 | 張三2 | 12 | 2020-06-24 15:23:57 |
+----+---------+------+---------------------+

2.3 新增事務

delimiter $$

drop
procedure
ifexists
`proc_transaction_test`$$
create
procedure
`proc_transaction_test`()
begin
start
transaction
;##整個儲存過程指定為乙個事務 
insert
into spe_transaction_tab2 (
`name`
,age,created)
values
('張三2',12
,now()
);insert
into spe_transaction_tab1 (
`name`
,age,created)
values
('張三111111111111張三張三張三張三',12
,now()
);commit
;end$$
delimiter
;

> 1406 - data too long for column 'name' at row 1

mysql> select * from spe_transaction_tab1 ;

empty set (0.00 sec)
mysql> select * from spe_transaction_tab2 ;
empty set (0.00 sec)

在處理事務時，使用sqlexception捕獲sql錯誤，然後處理在mysql儲存過程中捕獲sql錯誤，最後判斷是回滾(rollback)還是提交(commit)。

delimiter $$

drop
procedure
ifexists
`proc_transaction_test`$$
create
procedure
`proc_transaction_test`()
begin
declare t_error integer
default0;
declare
continue
handler
for sqlexception set t_error=1;
start
transaction
;##整個儲存過程指定為乙個事務 
insert
into spe_transaction_tab2 (
`name`
,age,created)
values
('張三2',12
,now()
);insert
into spe_transaction_tab1 (
`name`
,age,created)
values
('張三111111111111張三張三張三張三',12
,now()
);if t_error =
1then
rollback
;else
commit
;endif;
select t_error;
##返回標識位的結果集；
end$$
delimiter
;

mysql> call proc_transaction_test() ;

+---------+
| t_error |
+---------+
| 1 |
+---------+
1 row in set (0.01 sec)

mysql> select * from spe_transaction_tab1 ;

empty set (0.00 sec)
mysql> select * from spe_transaction_tab2 ;
empty set (0.00 sec)

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