mysql之常见存储过程书写

CREATE DEFINER=`root`@`localhost` PROCEDURE `2019,2030`(IN `yearStart` int,IN `yearEnd` int)
BEGIN
    #Routine body goes here...
DECLARE tableName VARCHAR(32);
DECLARE mon varchar(2);
DECLARE i int;
DECLARE j int;
set j=0;
set i=1;


while yearStart<=yearEnd DO

        while i<13 DO
                if i<10 THEN
                    set mon=CONCAT(‘0‘,i);    
                ELSE
                    set mon=CONCAT(i,‘‘);
                end if;
            
                set tableName=CONCAT(`yearStart`,mon);
                while j<3 DO
                            set @d=concat(‘DROP TABLE IF EXISTS t_api_log_‘,tableName,‘_‘,j,‘;‘);
                            prepare del from @d; 
                            execute del; 
                            SET @s=CONCAT(‘CREATE TABLE t_api_log_‘,tableName,‘_‘,j,‘ (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `type` int(11) DEFAULT NULL COMMENT \‘枚举(0：top订购请求，1：top退订请求，2：请求boss订购，3：请求boss退订；4：boss请求订购,5:boss请求退订)\‘,
  `create_time` datetime DEFAULT NULL,
  `user_id` varchar(50) DEFAULT NULL,
  `req_info` varchar(255) DEFAULT NULL,
  `resp_info` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8;‘);

                  prepare stmt from @s; 
          execute stmt; 
                
                    set j=j+1;
                end while;
                set j=0;
                set i=i+1;
        end while;
        set i=1;
        set yearStart=yearStart+1;
end while;

END