提交中的mysql事务

Question

CREATE DEFINER=`root`@`localhost` PROCEDURE `PrcCopyQuestion_Admin`(in Param1,in Param2 varchar(45))
BEGIN

 DECLARE EXIT HANDLER FOR SQLEXCEPTION
  BEGIN
      ROLLBACK;

Select 'Fail' as 'Status' ;      

  END; 

   DECLARE EXIT HANDLER FOR sqlwarning
  BEGIN
      ROLLBACK;

 Select 'Fail' as 'Status' ;         

  END; 

Start transaction;

   Insert statement 1; 

   Insert statement 2; 


   SELECT 'Success' AS 'Status'; 

call PrcGetQuestionAndOption_Admin(@variable); 

 Commit;

END

I am using Mysql 5.7 . When in the commit block if the second (Insert statement 2) fails. It will go in the Rollback part and gives me output as 'Failed' . But when i am getting the output it still executes the Select 'Success' as Status in commit block. So my question is when the second insert statement fails. It should go directly in rollback and give me status as fail. It should not execute the status as 'success' in commit block.

Eg: On rollback I am getting two result set:

Select 'Fail'..1st result set

Select 'Success'....2nd result set

I need output as only

Select 'fail'

Any help appreciated!!

Answer 1

I can't reproduce the problem.

mysql> SELECT VERSION();
+-----------+
| VERSION() |
+-----------+
| 5.7.12    |
+-----------+
1 row in set (0.00 sec)

mysql> DROP TABLE IF EXISTS  `t1`, `t2`;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE TABLE IF NOT EXISTS `t1` (
    ->   `c0` INTEGER UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE TABLE IF NOT EXISTS `t2` (
    ->   `c0` INTEGER UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql> DELIMITER //

mysql> DROP PROCEDURE IF EXISTS `PrcCopyQuestion_Admin`//
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE PROCEDURE `PrcCopyQuestion_Admin`(Param1 INT, Param2 VARCHAR(45))
    -> BEGIN
    ->   DECLARE EXIT HANDLER FOR SQLEXCEPTION
    ->     BEGIN
    ->       ROLLBACK;
    ->       SELECT 'Fail' Status;
    ->     END; 
    ->   DECLARE EXIT HANDLER FOR SQLWARNING
    ->     BEGIN
    ->       ROLLBACK;
    ->       SELECT 'Fail' Status;
    ->   END;
    ->   START TRANSACTION;
    ->   INSERT INTO `t1` (`c0`) VALUES (0);
    ->   IF Param1 = 0 THEN
    ->     INSERT INTO `ERR_t2` (`c0`) VALUES (0);
    ->   ELSE
    ->     INSERT INTO `t2` (`c0`) VALUES (0);
    ->   END IF;
    ->   SELECT 'Success' Status;
    ->   COMMIT;
    -> END//
Query OK, 0 rows affected (0.00 sec)

mysql> DELIMITER ;

mysql> CALL `PrcCopyQuestion_Admin`(0, NULL);
+--------+
| Status |
+--------+
| Fail   |
+--------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

mysql> SELECT
    ->   `c0`
    -> FROM
    ->   `t1`;
Empty set (0.00 sec)

mysql> SELECT
    ->   `c0`
    -> FROM
    ->   `t2`;
Empty set (0.00 sec)

mysql> CALL `PrcCopyQuestion_Admin`(1, NULL);
+---------+
| Status  |
+---------+
| Success |
+---------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

mysql> SELECT
    ->   `c0`
    -> FROM
    ->   `t1`;
+----+
| c0 |
+----+
|  2 |
+----+
1 row in set (0.00 sec)

mysql> SELECT
    ->   `c0`
    -> FROM
    ->   `t2`;
+----+
| c0 |
+----+
|  1 |
+----+
1 row in set (0.00 sec)