我在创建触发器时遇到了问题。我的“tb_pessoa”表存储我的用户数据。我希望在创建一个新插入时,它会在“tb_email”表中存储用户的电子邮件,检查它是否已经存在,但是当用光标执行查询时,表示光标未打开,而且是。它会是什么?触发错误1326 MySQL
CREATE DEFINER=`root`@`localhost` TRIGGER `db_agenda`.`tb_pessoa_AFTER_INSERT` AFTER INSERT ON `tb_pessoa` FOR EACH ROW
BEGIN
declare id_email, id_tipo_email int(11);
declare nm_email varchar(100);
declare cr_email cursor for
select id_email, nm_email, id_tipo_email
from tb_email
where nm_email like new.nm_email;
declare continue handler for sqlstate '02000'
open cr_email;
lp_email: loop
fetch cr_email into id_email, nm_email, id_tipo_email;
if (id_email = null) then
insert into tb_email set
id_email = (select max(id_email)+1 from tb_email),
nm_email = nm_email,
id_tipo_email = 1;
close cr_email;
leave lp_email;
end if;
end loop lp_email;
close cr_email;
END
'id_email'是一个自动增量列吗? – Barmar
不,它是通过max(id_email)+ 1的子查询插入的 –
为什么不将它更改为auto_increment?然后它会自动完成。 – Barmar