Question

当我尝试创建如下所示的触发器时，

CREATE TRIGGER FiscalYearTable1_bi 
BEFORE INSERT  
ON FiscalYearTable1 
FOR EACH ROW  
     IF ( 
             ( EXTRACT (YEAR FROM FiscalYearTable1.start_date) !=  FiscalYearTable1.fiscal_year - 1) OR
            (EXTRACT (MONTH FROM FiscalYearTable1.start_date) != 04) OR
            (EXTRACT (DAY FROM FiscalYearTable1.start_date) != 01) 
       ) 
          SET FiscalYearTable1.fiscal_year = 1/0;

我收到以下错误，

错误1064（42000）：您的SQL语法有错误;检查与MySQL服务器版本对应的手册，以便在'FROM FiscalYearTable1.start_date'附近使用正确的语法！= FiscalYearTable1.fiscal_year - 1）或（第1行的EXTRA'

我无法弄清楚错误是什么。有任何想法吗？感谢

Answer 1

类似的东西：

delimiter #

create trigger FiscalYearTable1_before_ins_trig before insert on FiscalYearTable1
for each row
begin

declare y smallint unsigned default 0;
declare m tinyint unsigned default 0;
declare d tinyint unsigned default 0;

  set y = year(new.start_date);
  set m = month(new.start_date);
  set d = day(new.start_date);

  -- whatever logic you require...
  if y != new.fiscal_year-1 or m != 4 or d != 1 then
    set new.fiscal_year = null; 
  end if;

end#

delimiter ;

使用提取函数创建触发器时出现mysql错误

1 个答案: