复制代码 代码如下: — 建立测试表和数据 create table webuser (username varchar(10)); insert into webuser values (‘a1’),(‘a2’),(‘a3’),(‘b1’),(‘b2’),(‘b3’); commit; — 建立存储过程 drop procedure if exists dynamic_cursor;
复制代码 代码如下:– 建立测试表和数据create table webuser (username varchar(10));insert into webuser values (‘a1’),(‘a2’),(‘a3’),(‘b1’),(‘b2’),(‘b3’);commit;– 建立存储过程drop procedure if exists dynamic_cursor;delimiter //CREATE PROCEDURE dynamic_cursor (IN p_name varchar(10))BEGIN DECLARE done INT DEFAULT 0; DECLARE v_username varchar(10); DECLARE cur CURSOR for( SELECT username from webuser_view); DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1; DROP VIEW IF EXISTS webuser_view; SET @sqlstr = “CREATE VIEW webuser_view as “; SET @sqlstr = CONCAT(@sqlstr , “SELECT username FROM webuser WHERE username like ‘”, p_name,”%'”); PREPARE stmt FROM @sqlstr; EXECUTE stmt; DEALLOCATE PREPARE stmt; OPEN cur; f_loop:LOOP FETCH cur INTO v_username; IF done THEN LEAVE f_loop; END IF; SELECT v_username; END LOOP f_loop; CLOSE cur;END;//delimiter ;– 测试call dynamic_cursor(‘a’);
