Question

我创建了以下存储过程但是我的Mysql抛出了ERROR 1064。我需要做的是对于表logbackup中存在的每个用户，找到他的第一个动作的日期，然后是他最后一个动作的日期并计算持续时间。虽然，我知道我可以用不同的方式轻松完成，但是我希望能帮助解决因为我是mysql新手而可能遇到的任何语法错误。

 EDIT:


            USE 'databasename'
            DROP procedure IF EXISTS `userEngagementCalc`;
            DELIMITER $$
            USE `databasename`$$
            CREATE DEFINER=`root`@`%localhost` PROCEDURE `userEngagementCalc`()
            CREATE PROCEDURE userEngagementCalc()
            BEGIN

            DECLARE v_username varchar(50);
            DECLARE startDate datetime;
            DECLARE endDate datetime;
            DECLARE duration int;
            DECLARE done INT DEFAULT FALSE;

            DECLARE cur1 cursor for 
                    select distinct username
                    from logbackup;
            DECLARE continue handler for not found set done=true;


                OPEN cur1;

                igmLoop: LOOP
                    fetch cur1 into v_username;
                    if done then leave igmLoop; end if;

                    set @startDate:=(select STR_TO_DATE(created_date, '%a %b %d %Y %H:%i:%s') from logbackup where username=v_username order by STR_TO_DATE(created_date, '%a %b %d %Y %H:%i:%s') asc LIMIT 1);
                    set @endDate:=(select STR_TO_DATE(created_date, '%a %b %d %Y %H:%i:%s') from logbackup where username=v_username order by STR_TO_DATE(created_date, '%a %b %d %Y %H:%i:%s') desc LIMIT 1);
                    set @duration:= TIME_TO_SEC(TIMEDIFF(@startDate,@endDate));

                    INSERT INTO  userengagement (username,startDate,endDate,duration) VALUES (v_username,@startDate,@endDate,@duration);
                END LOOP igmLoop;   

                CLOSE cur1;
            END$$
            DELIMITER;

我正在尝试在Ubuntu mysql终端上执行此scipt。是否需要任何特殊操作＆gt;？我从mysql收到的内容除了ERROR消息之外的内容如下：

Display all 813 possibilities? (y or n)
?                            DAY_MINUTE                   INNODB                            MULTILINESTRINGFROMWKB       SESSION_USER                 VARIANCE
ABS                          DAY_SECOND                   INOUT                        MULTIPOINT                   SET                          VARYING
ACOS                         DEALLOCATE                   INSENSITIVE                  MULTIPOINTFROMTEXT           SHA                          VAR_POP
ACTION                       DEC

感谢您的帮助。

带有游标问题的MySql-存储过程

0 个答案: