mysql函数中使用repeat循环的例子

mysql中repeat循环的例子，代码如下：

mysql> delimiter $$
mysql> CREATE FUNCTION test(n INT) RETURNS TEXT //创建带返回值的函数
    -> BEGIN
    ->     DECLARE i INT DEFAULT 0;
    ->     DECLARE s TEXT DEFAULT '';
    ->     myloop: REPEAT
    ->       SET i = i+1;
    ->       SET s = CONCAT(s, "*");
    ->     UNTIL i>=n END REPEAT;
    ->     RETURN s;
    -> END$$
Query OK, 0 rows affected (0.00 sec)

mysql> delimiter ;
mysql> SELECT test(5);
+---------+
| test(5) |
+---------+
| *****   |
+---------+
1 row in set (0.00 sec)

mysql> drop function test; //删除mysql自定义函数
Query OK, 0 rows affected (0.00 sec)