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MySQL 存储过程的异常处理
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mysql>
mysql> delimiter $$
mysql>
mysql>
CREATE
PROCEDURE
myProc
-> (p_first_name
VARCHAR
(30),
-> p_last_name
VARCHAR
(30),
-> p_city
VARCHAR
(30),
-> p_description
VARCHAR
(30),
->
OUT
p_sqlcode
INT
,
->
OUT
p_status_message
VARCHAR
(100))
->
BEGIN
->
->
/* START Declare Conditions */
->
->
DECLARE
duplicate_key CONDITION
FOR
1062;
->
DECLARE
foreign_key_violated CONDITION
FOR
1216;
->
->
/* END Declare Conditions */
->
->
/* START Declare variables and cursors */
->
->
DECLARE
l_manager_id
INT
;
->
->
DECLARE
csr_mgr_id
CURSOR
FOR
->
SELECT
id
->
FROM
employee
->
WHERE
first_name=p_first_name
->
AND
last_name=p_last_name;
->
->
/* END Declare variables and cursors */
->
->
/* START Declare Exception Handlers */
->
->
DECLARE
CONTINUE
HANDLER
FOR
duplicate_key
->
BEGIN
->
SET
p_sqlcode=1052;
->
SET
p_status_message=
‘Duplicate key error‘
;
->
END
;
->
->
DECLARE
CONTINUE
HANDLER
FOR
foreign_key_violated
->
BEGIN
->
SET
p_sqlcode=1216;
->
SET
p_status_message=
‘Foreign key violated‘
;
->
END
;
->
->
DECLARE
CONTINUE
HANDLER
FOR
not
FOUND
->
BEGIN
->
SET
p_sqlcode=1329;
->
SET
p_status_message=
‘No record found‘
;
->
END
;
->
->
/* END Declare Exception Handlers */
->
->
/* START Execution */
->
->
SET
p_sqlcode=0;
->
OPEN
csr_mgr_id;
->
FETCH
csr_mgr_id
INTO
l_manager_id;
->
-> IF p_sqlcode<>0
THEN
/* Failed to get manager id*/
->
SET
p_status_message=CONCAT(p_status_message,
‘ when fetching manager id‘
);
->
ELSE
->
INSERT
INTO
employee (first_name,id,city)
->
VALUES
(p_first_name,l_manager_id,p_city);
->
-> IF p_sqlcode<>0
THEN
/* Failed to insert new department */
->
SET
p_status_message=CONCAT(p_status_message,
->
‘ when inserting new department‘
);
->
END
IF;
->
END
IF;
->
->
CLOSE
csr_mgr_id;
->
->
/* END Execution */
->
->
END
$$
Query OK, 0
rows
affected (0.02 sec)
mysql>
mysql> delimiter ;
mysql>
set
@myCode = 0;
Query OK, 0
rows
affected (0.00 sec)
mysql>
set
@myMessage = 0;
Query OK, 0
rows
affected (0.00 sec)
mysql>
mysql> call myProc(
‘Jason‘
,
‘Martin‘
,
‘New City‘
,
‘New Description‘
,@myCode,@myMessage);
Query OK, 1 row affected (0.00 sec)
mysql>
mysql>
select
@myCode, @myMessage;
+
---------+------------+
| @myCode | @myMessage |
+
---------+------------+
| 0 |
NULL
|
+
---------+------------+
1 row
in
set
(0.00 sec)
mysql>
mysql>
drop
procedure
myProc;
Query OK, 0
rows
affected (0.00 sec)
http://www.oschina.net/code/snippet_54100_27
MySQL 存储过程的异常处理
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本文系统来源:http://www.cnblogs.com/seasonzone/p/4794945.html
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