一个关于游标的有关问题-MySQL教程-爱易网页

一个关于游标的有关问题

日期：2014-05-16　浏览次数：20798 次

一个关于游标的问题
sql数据准备：

SQL code

DROP TABLE IF EXISTS T_User;
CREATE TABLE T_User(
    id INT PRIMARY KEY,
    age  INT,
    tname VARCHAR(20)
);
INSERT INTO T_User VALUE(1,11,'abc1');
INSERT INTO T_User VALUE(2,12,'abc2');
INSERT INTO T_User VALUE(3,13,'abc3');
INSERT INTO T_User VALUE(4,14,'abc4');
INSERT INTO T_User VALUE(5,15,'abc5');
INSERT INTO T_User VALUE(6,16,'abc6');

游标代码：

SQL code

CREATE PROCEDURE curdemo()
BEGIN
    DECLARE age1 INT;
    DECLARE id1 INT;
    DECLARE Cur CURSOR FOR SELECT id,age FROM T_User;
    OPEN Cur;
    FETCH Cur INTO id1,age1;
    WHILE @@fetch_status=0
    BEGIN
        UPDATE T_User SET age=age1+1 WHERE id=id1;
        FETCH Cur INTO id1,age1;
    END   
    CLOSE Cur;
    DEALLOCATE Cur;
END

############################################################################

CREATE PROCEDURE curdemo1()
BEGIN
    DECLARE age1 INT;
    DECLARE id1 INT;
    DECLARE Cur CURSOR FOR SELECT id,age FROM T_User;
    DECLARE EXIT HANDLER FOR NOT FOUND CLOSE Cur;
    OPEN Cur;
    REPEAT
    FETCH Cur INTO id1,age1;
    UPDATE T_User SET age=age1+1 WHERE id=id1;
    UNTIL done 
    END REPEAT;
    CLOSE Cur;
    DEALLOCATE;
END;

这两个游标都不对，我用的是Mysql5.1的数据库，老是报语句错误。
错误提示：
Query : CREATE PROCEDURE curdemo() BEGIN DECLARE age1 INT
Error Code : 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 3
Execution Time : 00:00:00:000
Transfer Time : 00:00:00:000
Total Time : 00:00:00:000

....

很多，都是这类的错误。

谁能帮我解决一下，谢谢！！！！

------解决方案--------------------
delimiter //
CREATE PROCEDURE curdemo()
BEGIN
DECLARE age1 INT;
DECLARE id1 INT;
DECLARE Cur CURSOR FOR SELECT id,age FROM T_User;
OPEN Cur;
FETCH Cur INTO id1,age1;
WHILE @@fetch_status=0
BEGIN
UPDATE T_User SET age=age1+1 WHERE id=id1;
FETCH Cur INTO id1,age1;
END
CLOSE Cur;
DEALLOCATE Cur;
END//
delimiter ;
------解决方案--------------------
DELIMITER $$
CREATE PROCEDURE curdemo()
BEGIN
DECLARE age1 INT;
DECLARE id1 INT;
DECLARE done INT DEFAULT 0;
DECLARE Cur CURSOR FOR SELECT id,age FROM T_User;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN Cur;
FETCH Cur INTO id1,age1;
WHILE done=0 DO

UPDATE T_User SET age=age1+1 WHERE id=id1;
FETCH Cur INTO id1,age1;
END WHILE ;
CLOSE Cur;
END$$
DELIMITER ;

其它的自行修改
------解决方案--------------------

SQL code

delimiter //
CREATE PROCEDURE curdemo()
BEGIN
  DECLARE age1 INT;
  DECLARE id1 INT;
  DECLARE Cur CURSOR FOR SELECT id,age FROM T_User;
  OPEN Cur;
  FETCH Cur INTO id1,age1;
  WHILE @@fetch_status=0
  BEGIN
  UPDATE T_User SET age=age1+1 WHERE id=id1;
  FETCH Cur INTO id1,age1;
  END   
  CLOSE Cur;
  DEALLOCATE Cur;
END//
delimiter ;

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