触发器上的MySQL语法错误

Question

我无法在MySQL 5.3上编译这个触发代码：

CREATE TRIGGER crmenq_bur 
BEFORE UPDATE 
ON crmenquiries
FOR EACH ROW
BEGIN
   IF (    NEW.feedback = OLD.feedback 
       AND NEW.notes = OLD.notes
       AND NEW.estatus = OLD.estatus )
   THEN
      SET NEW.update_type = 'NN';
   ELSE
      SET NEW.update_type = 'SEN';
      SET new.last_update2 = now();
   END IF;
   CASE 
      WHEN NEW.estatus != OLD.estatus AND NEW.estatus = 'FP3' THEN
         SET NEW.uid_follow_up = NEW.uid_last_update_by;
         SET NEW.follow_up_date = DATE_ADD ( date(), INTERVAL 3 MONTH );
      WHEN NEW.estatus != OLD.estatus AND NEW.estatus = 'FP6' THEN
         SET NEW.uid_follow_up = NEW.uid_last_update_by;
         SET NEW.follow_up_date = DATE_ADD ( date(), INTERVAL 6 MONTH );
      WHEN NEW.estatus != OLD.estatus AND NEW.estatus = 'FP9' THEN
         SET NEW.uid_follow_up = NEW.uid_last_update_by;
         SET NEW.follow_up_date = DATE_ADD ( date(), INTERVAL 9 MONTH );
      WHEN NEW.estatus != OLD.estatus AND NEW.estatus = 'FP12' THEN
         SET NEW.uid_follow_up = NEW.uid_last_update_by;
         SET NEW.follow_up_date = DATE_ADD ( date(), INTERVAL 12 MONTH );
      WHEN NEW.estatus NOT IN ( 'FP3', 'FP6', 'FP9', 'FP12' ) THEN
         SET NEW.uid_follow_up = NULL;
         SET NEW.follow_up_date = NULL;
   END CASE;
END;

当我运行这个程序时，我会得到以下错误：

[You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '), INTERVAL 3 MONTH ); WHEN NEW.estatus != OLD.estatus AND NEW.estatus = ' at line 18]

最初，我嵌套了IF，但更改为CASE，以查看这是否产生了任何不同。当前的表单并不是我最初使用它的方式(嵌套IF以避免重复相同的条件)，但是每次尝试失败，代码都被更改了，但是我尝试过的任何东西都没有起作用。

列/表名是正确的。

Answer 1

引发的错误是由于调用MySQL date()函数造成的。它被误用了。

我不确定你是否打算用现在的日期。

如果是，您可以对代码中的所有date()用法使用以下任何建议。

http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html#function_curdate --返回当前日期 http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html#function_current-date -- CURDATE()的同义词 http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html#function_current-date -- CURDATE()的同义词

示例：

mysql> select curdate(), current_date(), current_date;
+------------+----------------+--------------+
| curdate()  | current_date() | current_date |
+------------+----------------+--------------+
| 2014-07-01 | 2014-07-01     | 2014-07-01   |
+------------+----------------+--------------+

您也可以使用http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html#function_date函数，但它接受date、datetime或timestamp类型的输入参数。

示例：

mysql> select date( sysdate() ), date( now() ), date( curtime() ), date( curdate() );
+-------------------+---------------+-------------------+-------------------+
| date( sysdate() ) | date( now() ) | date( curtime() ) | date( curdate() ) |
+-------------------+---------------+-------------------+-------------------+
| 2014-07-01        | 2014-07-01    | 2014-07-01        | 2014-07-01        |
+-------------------+---------------+-------------------+-------------------+

指的是文档：

• http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html

Answer 2

在启动之前使用类似于Delimiter $$的内容更改分隔符，并使用新的分隔符结束触发器。当你完成任务后，把它改回来，就像这样：

Delimiter $$
CREATE TRIGGER crmenq_bur 
BEFORE UPDATE 
ON crmenquiries
FOR EACH ROW
BEGIN
 /* Body of code here */
END $$
Delimiter ;