mysql动态sql，存储过程动态tablename，存储过程参数为表名

DELIMITER $$
DROP PROCEDURE IF EXISTS `proc`$$
CREATE
    PROCEDURE `ondutystatisticdb`.`proc`(tablename VARCHAR(50))
    BEGIN
    
    SET @STMT :=CONCAT(" ALTER TABLE ",tablename," DROP PRIMARY KEY;");   
    PREPARE STMT FROM @STMT;   
    EXECUTE STMT;
    
    END$$

DELIMITER ;