mysql 存储过程游标（Cursor）实例

DELIMITER $

USE `newtest`$

DROP PROCEDURE IF EXISTS `p1`$

CREATE DEFINER=`root`@`localhost` PROCEDURE `p1`()
BEGIN
	DECLARE dn VARCHAR(20);
	DECLARE stopFlag INT; 
	DECLARE v_fetch_status INT DEFAULT 1;
	-- 定义游标
	DECLARE get_sql CURSOR FOR SELECT dept_name FROM testtable GROUP BY dept_name;
	-- 下面这一块一定得紧随游标定义，不然就会报错
	DECLARE CONTINUE HANDLER FOR NOT FOUND
	BEGIN
		SET v_fetch_status = 0;
	END;
	
	SET @csql=CONCAT("create table if not exists test(dept_name varchar(20) NOT NULL)");
	PREPARE stm FROM @csql;
	EXECUTE stm;
	-- 循环游标---------get_sql---------start--------------
	OPEN get_sql;
	lab1:LOOP
	FETCH get_sql INTO dn ;
	BEGIN
		SET @csql=CONCAT("insert into test(dept_name) values('",dn,"')");
		PREPARE stm FROM @csql;
		EXECUTE stm;
	END;
	IF v_fetch_status = 0 THEN
		LEAVE lab1;
	END IF; 
	END LOOP lab1;
	CLOSE get_sql;
	-- 循环游标---------get_sql---------end--------------------------------------
	
	SELECT * FROM test;
    END$

DELIMITER ;