我试图在sql中执行一个过程,但是我在使用日期参数时遇到了一些问题
DELIMITER #
CREATE PROCEDURE conso(IN p_upcNameId VARCHAR(20), IN p_dateFrom DATE, IN p_dateTo DATE)
BEGIN
DECLARE done int default false;
DECLARE v_cumule FLOAT;
DECLARE v_reserve VARCHAR(40);
DECLARE v_kg VARCHAR(40);
DECLARE v_date DATETIME;
DECLARE v_reserve_1 VARCHAR(40);
DECLARE v_kg_1 VARCHAR(40);
DECLARE v_date_1 DATETIME;
DECLARE cur1 CURSOR FOR
SELECT reserve, kg, date
FROM
(
( SELECT event_param_3 as reserve, event_param_4 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 50 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_2 as reserve, event_param_3 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 54 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_2 as reserve, event_param_3 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 52 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_1 as reserve, event_param_2 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 56 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_2 as reserve, event_param_3 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 53 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_1 as reserve, event_param_2 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 57 ORDER BY event_datetime DESC )
) as diffusion_programs
ORDER BY date DESC;
DECLARE cur2 CURSOR FOR
SELECT reserve, kg, date
FROM
(
( SELECT event_param_3 as reserve, event_param_4 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 50 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_2 as reserve, event_param_3 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 54 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_2 as reserve, event_param_3 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 52 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_1 as reserve, event_param_2 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 56 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_2 as reserve, event_param_3 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 53 ORDER BY event_datetime DESC )
UNION
( SELECT event_param_1 as reserve, event_param_2 as kg, event_datetime as date FROM events WHERE upcNameId = p_upcNameId AND event_code = 57 ORDER BY event_datetime DESC )
) as diffusion_programs
WHERE date >= p_dateFrom;
AND date <= p_dateTo;
ORDER BY date DESC;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN cur1;
OPEN cur2;
/* Create temporary table */
CREATE TEMPORARY TABLE tmp
(
date DATE,
kg FLOAT
);
SET v_cumule = 0;
FETCH cur2 INTO v_reserve_1, v_kg_1, v_date_1;
forLoop: LOOP
/* Actual row */
FETCH cur1 INTO v_reserve, v_kg, v_date;
/* Next row */
FETCH cur2 INTO v_reserve_1, v_kg_1, v_date_1;
/* Reserves differents TODO */
/*IF v_reserve != v_reserve_1
END IF;*/
IF DATE(v_date) = DATE(v_date_1) THEN SET v_cumule = v_cumule + (v_kg_1 - v_kg);
ELSE
INSERT INTO tmp VALUES (DATE(v_date), v_cumule);
SET v_cumule = 0;
END IF;
IF done THEN LEAVE forLoop;
END IF;
END LOOP;
CLOSE cur1;
CLOSE cur2;
END#
您可以看到p\u datefrom和p\u dateto是调用函数时要传递的参数:
DELIMITER ;
CALL conso('Name','2017-01-01','2018-01-01');
SELECT * FROM tmp;
如你所见,这是一个日期间隔。但我有个错误:
1064年-erreur de Syntax près de'和日期<=p_dateto;按日期说明订购;'声明继续处理程序'à 拉利尼53
你能帮帮我吗?
2条答案
按热度按时间rjee0c151#
“date”是mysql中的保留字。请使用其他别名。
另外,您应该考虑使用case语句来摆脱多个union语句(您可以在一个查询中生成所有union语句)。
编辑:这个错误是因为斯宾塞7593已经指出,您有多余的分号。
event_param_x列被声明为varchar列,但是您正在对这些列执行算术运算(+-)。
3hvapo4f2#
有一些假分号(语句终止符)。
把那些拿走
原始(错误)答案:
这个
CONTINUE HANDLER
必须在变量声明之后,但必须在游标声明之前(我认为这在mysql参考手册中有模糊的记录。mysql存储程序非常讲究语句的顺序。)要纠正这个错误,只需移动
DECLARE CONTINUE HANDLER
在第一个DECLARE CURSOR
.