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学习mysql中call语句调用函数的例子。
代码：
mysql> delimiter $$
mysql> CREATE FUNCTION isodd(input_number int) //创建函数
-> RETURNS int
-> BEGIN
-> DECLARE v_isodd INT;
->
-> IF MOD(input_number,2)=0 THEN
-> SET v_isodd=FALSE;
-> ELSE
-> SET v_isodd=TRUE;
-> END IF;
->
-> RETURN(v_isodd);
->
-> END$$
Query OK, 0 rows affected (0.01 sec)
mysql> CREATE PROCEDURE myProc(aNumber int) //创建mysql存储过程
-> Begin
-> IF (isodd(aNumber)) THEN
-> SELECT ' is odd';
-> ELSE
-> SELECT ' is even';
-> END IF;
-> END$$
Query OK, 0 rows affected (0.02 sec)
mysql> delimiter ;
mysql> call myProc(2); //call 调用存储过程
+----------+
| is even |
+----------+
| is even |
+----------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.01 sec)
mysql> call myProc(1); //call 调用存储过程
+---------+
| is odd |
+---------+
| is odd |
+---------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
mysql> call myProc(4); //调用mysql存储过程
+----------+
| is even |
+----------+
| is even |
+----------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
mysql> drop procedure myProc; //删除mysql存储过程
Query OK, 0 rows affected (0.00 sec)
mysql> drop function isodd; //删除mysql函数
Query OK, 0 rows affected (0.00 sec)
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