Question

功能

delimiter $$
    create function my_calculation( s1_ia_att decimal, s1_t1 decimal, s1_t2 decimal, s1_t3 decimal, s2_ia_att decimal, s2_t1 decimal, s2_t2 decimal, s2_t3 decimal, s3_ia_att decimal, s3_t1 decimal, s3_t2 decimal, s3_t3 decimal, s4_ia_att decimal, s4_t1 decimal, s4_t2 decimal, s4_t3 decimal, s5_ia_att decimal, s5_t1 decimal, s5_t2 decimal, s5_t3 decimal, s6_ia_att decimal, s6_t1 decimal, s6_t2 decimal, s6_t3 decimal, s7_ia_att decimal, s7_t1 decimal, s7_t2 decimal, s7_t3 decimal, s8_ia_att decimal, s8_t1 decimal, s8_t2 decimal, s8_t3 decimal )
    returns int
    deterministic 
    begin 
      RETURN
      (s1_t1 + s1_t2 + s1_t3 - LEAST(s1_t1, s1_t2, s1_t3)) / 2
      +
      CASE 
        WHEN s1_ia_att > 95 THEN 5
        WHEN s1_ia_att BETWEEN 81 AND 95 THEN 4
        WHEN s1_ia_att BETWEEN 76 AND 80 THEN 3
        WHEN s1_ia_att BETWEEN 61 AND 75 THEN 2
        WHEN s1_ia_att < 60 THEN 0 

       (s2_t1 + s2_t2 + s2_t3 - LEAST(s2_t1, s2_t2, s2_t3)) / 2
      +
      CASE 
        WHEN s2_ia_att > 95 THEN 5
        WHEN s2_ia_att BETWEEN 81 AND 95 THEN 4
        WHEN s2_ia_att BETWEEN 76 AND 80 THEN 3
        WHEN s2_ia_att BETWEEN 61 AND 75 THEN 2
        WHEN s2_ia_att < 60 THEN 0 
       END;
    END $$
    DELIMITER ;

这就是我的触发器

delimiter $$
create trigger abc before insert 
on `test` for each row
begin
   declare `value` decimal;

   SET NEW.s1_ia_tot = my_calculation( NEW.s1_ia_att, NEW.s1_t1, NEW.s1_t2, NEW.s1_t3 );
   SET NEW.s2_ia_tot = my_calculation( NEW.s2_ia_att, NEW.s2_t1, NEW.s2_t2, NEW.s2_t3 );
   SET NEW.s3_ia_tot = my_calculation( NEW.s3_ia_att, NEW.s3_t1, NEW.s3_t2, NEW.s3_t3 );
   ......
end $$
delimiter ;

我已经调整了触发器和功能并且ia_att_tot字段仍然只发生null 我无法找到此代码中的问题。有人可以告诉我的代码有什么问题吗？

我的表

CREATE TABLE IF NOT EXISTS `test` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`s1_ia_att` DECIMAL(12, 2) NULL,
....
....
`s1_t1` DECIMAL(12, 2) NULL,
`s1_t2` DECIMAL(12, 2) NULL,
`s1_t3` DECIMAL(12, 2) NULL,
....
....
`s1_ia_tot` DECIMAL(12, 2) NULL,
 ......
 .....
PRIMARY KEY (`id`)
);

Answer 1

可能是您将超出范围的值传递给函数中的CASE语句。由于case语句中没有ELSE子句，因此默认情况下返回NULL。定义ELSE子句并设置非NULL值。然后看看会发生什么。

在我的sql中调用触发器中的函数

1 个答案: