Question

我正在尝试在MySQL中创建一个过程。这是身体：

BEGIN

DECLARE _date_delivered datetime;
DECLARE _date_last_comment datetime;
DECLARE _buyer_id int;
DECLARE _date_finish_line datetime;

   SELECT o.date_delivered INTO _date_delivered,o.buyer_id INTO _buyer_id, h.date INTO 
       _date_las_comment, DATE_ADD( h.date, INTERVAL _hours HOUR ) 
       INTO _date_finish_line 
   FROM wpk9_kk_order o 
   LEFT JOIN 
       wpk9_kk_order_history h ON 
       o.order_id = h.order_id WHERE o.order_id = _order_id AND h.user_id = o.buyer_id 
   ORDER BY h.date DESC;

   select _date_delivered,_buyer_id, _date_last_comment, _date_finish_line;
END

但是当我保存它时，我收到了这个错误：

处理您的请求时发生了一个或多个错误：

以下查询失败：“CREATE DEFINER = root @ localhost PROCEDURE getAutoFinishTimeRemaining（IN _order_id INT，IN _hours INT）NOT DETERMINISTIC READS SQL DATA SQL SECURITY DEFINER BEGIN DECLARE _date_delivered datetime; DECLARE _date_last_comment datetime; DECLARE _buyer_id int; DECLARE _date_finish_line datetime; SELECT o.date_delivered INTO _date_delivered，o.buyer_id INTO _buyer_id，h.date INTO _date_las_comment，DATE_ADD（h.date，INTERVAL _hours HOUR）INTO _date_finish_line FROM wpk9_kk_order o LEFT JOIN wpk9_kk_order_history h ON o.order_id = h.order_id WHERE o .order_id = _order_id AND h.user_id = o.buyer_id ORDER BY h.date DESC; select _date_delivered，_buyer_id，_date_last_comment，_date_finish_line; END“

MySQL说：＃1327 - 未声明的变量：o

Answer 1

检查您的_date_last_comment列。在select语句中编写_date_last_comment列时出现错字。您已写过_date_las_comment（在错误消息中也清楚地看到了这一点。）

您的程序应该是：

BEGIN

DECLARE _date_delivered datetime;
DECLARE _date_last_comment datetime;
DECLARE _buyer_id int;
DECLARE _date_finish_line datetime;

   SELECT o.date_delivered INTO _date_delivered,o.buyer_id INTO _buyer_id, h.date INTO 
       _date_last_comment, DATE_ADD( h.date, INTERVAL _hours HOUR ) 
       INTO _date_finish_line 
   FROM wpk9_kk_order o 
   LEFT JOIN 
       wpk9_kk_order_history h ON 
       o.order_id = h.order_id WHERE o.order_id = _order_id AND h.user_id = o.buyer_id 
   ORDER BY h.date DESC;

   select _date_delivered,_buyer_id, _date_last_comment, _date_finish_line;
END

未定义的变量o

1 个答案: