MySQL存储过程带in和out参数_MySQL

[html] mysql> DELIMITER $$ mysql> USE test $$ Database changed mysql> DROP PROCEDURE IF EXISTS `sp_add`$$ Query OK, 0 rows affected (0.00 sec) mysql> CREATE PROCEDURE sp_add(a INT, b INT,OUT c INT) -> BEGIN -> SET c=a+ b; -> END$$ Query OK, 0 rows affected (0.00 sec) mysql> DELIMITER ; 

[html] mysql> CALL sp_add (1,2,@c); Query OK, 0 rows affected (0.00 sec)
mysql> SELECT @c; +------+ | @c | +------+ | 3 | +------+ 1 row in set (0.00 sec)

[html] mysql> show create table t_BillNo; +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table | +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | t_BillNo | CREATE TABLE `t_billno` ( `SaleNo` bigint(20) DEFAULT NULL, `bmh` varchar(20) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=DYNAMIC | +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> select * from t_BillNo; +--------+------+ | SaleNo | bmh | +--------+------+ | 1 | 2 | | 4 | 3 | | 4 | 5 | | 7 | 7 | | 12 | 8 | +--------+------+ 5 rows in set (0.00 sec) mysql> mysql> DELIMITER $$ mysql> USE test $$ Database changed mysql> DROP PROCEDURE IF EXISTS `sp_GetMaxNumber`$$ Query OK, 0 rows affected (0.01 sec) DELIMITER $$ USE test $$ DROP PROCEDURE IF EXISTS `sp_GetMaxNumber`$$ CREATE PROCEDURE sp_GetMaxNumber (IN v_bmh VARCHAR(6), OUT v_MaxNo INT) BEGIN START TRANSACTION; UPDATE t_BillNo SET SaleNo = IFNULL(SaleNo,0)+1 WHERE bmh = v_bmh; IF @@error_count = 0 THEN BEGIN SELECT Saleno INTO v_MaxNo FROM t_BillNo WHERE bmh = v_bmh; COMMIT; END; ELSE BEGIN ROLLBACK; SET v_MaxNo = 0; END; END IF; END$$ DELIMITER ; mysql> CREATE PROCEDURE sp_GetMaxNumber (IN v_bmh VARCHAR(6), OUT v_MaxNo INT) -> BEGIN -> START TRANSACTION; -> UPDATE t_BillNo -> SET SaleNo = IFNULL(SaleNo,0)+1 -> WHERE bmh = v_bmh; -> IF @@error_count = 0 THEN -> BEGIN -> SELECT Saleno INTO v_MaxNo FROM t_BillNo WHERE bmh = v_bmh; -> COMMIT; -> END; -> ELSE -> BEGIN -> ROLLBACK; -> SET v_MaxNo = 0; -> END; -> END IF; -> END$$ Query OK, 0 rows affected (0.00 sec) mysql> DELIMITER ; mysql> mysql> call sp_GetMaxNumber(8,@v_MaxNo); Query OK, 0 rows affected (0.00 sec) mysql> select @v_MaxNo; +----------+ | @v_MaxNo | +----------+ | 12 | +----------+ 1 row in set (0.00 sec)