MySQL 简单存储过程实现Redis的INCR功能

USE test;

DROP PROCEDURE IF EXISTS pro_testincrement;
DELIMITER &&
CREATE PROCEDURE pro_testincrement(IN inr int)
BEGIN
DECLARE i INT DEFAULT 0;
select max(id) into i from test.testpro;
update test.testpro set id = id+inr where id = i;
select max(id) from test.testpro;
END &&
DELIMITER ;

mysql> call pro_testincrement (3);
+---------+
| max(id) |
+---------+
| 68 |
+---------+
1 row in set (0.01 sec)

Query OK, 0 rows affected (0.01 sec)

mysql> call pro_testincrement (3);
+---------+
| max(id) |
+---------+
| 71 　　  |
+---------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

mysql> call pro_testincrement (1);
+---------+
| max(id) |
+---------+
| 72      |
+---------+
1 row in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)