我正在尝试在 sql 中执行一个过程,但我在日期参数方面遇到一些问题
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#
您会看到 p_datefrom 和 p_dateto 是我在调用函数时想要传递的一些参数:
DELIMITER ;
CALL conso('Name','2017-01-01','2018-01-01');
SELECT * FROM tmp;
如您所见,这是一个日期间隔。 但我收到此错误:
1064 - 'AND date <= p_dateTo; 语法错误 按日期 DESC 排序; 声明 CONTINUE HANDLER' à la ligne 53
你能帮我吗?
最佳答案
'date'是MySQL中的保留字。使用另一个别名。
此外,您应该考虑使用 CASE 语句来消除多个 UNION 语句(您可以在一个查询中进行所有 UNION 语句)。
编辑: 该错误来自以下事实:您有多余的分号,正如 spencer7593 已经指出的那样。
event_param_X 列被声明为 varchar,但您正在对它们进行算术运算 (+-)。
关于mysql - SQL 过程参数,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50003974/