Question

我正在尝试创建一个触发器来自动更新数据库中用户的状态级别。状态级别基于用户生成的收入金额。这就是我到目前为止所提出的。

create or replace trigger update_hirer_status
after insert or update of payment_id, status_id on payments
for each row
declare 
user_id_temp number := 0;
total_amount number := 0;

begin
select external_users.external_user_id into user_id_temp
from external_users
join financial_accounts
using (external_user_id)
join payments
on financial_accounts.account_number = payments.sending_account_number
where financial_accounts.account_number = payments.sending_account_number;

select sum(amount) into total_amount
from payments
join
financial_accounts
on payments.sending_account_number = financial_accounts.account_number
join external_users
on financial_accounts.external_user_id = external_users.external_user_id
where payments.status_id = 1
and financial_accounts.external_user_id = user_id_temp;

if total_amount >= 2000
then update external_users
set status_id = 4
where external_user_id = user_id_temp;

elsif total_amount >= 500
then update external_users
set status_id = 3
where external_user_id = user_id_temp;

elsif total_amount >= 100
then update external_users
set status_id = 2
where external_user_id = user_id_temp;

end if;
end;

尝试创建此触发器时，我收到以下错误消息：

第6行出错：PL / SQL：忽略SQL语句

declare
user_id_temp number := 0;
total_amount number := 0;
begin
select external_users.external_user_id into user_id_temp

有谁知道问题可能是什么？这是我第一次尝试创建触发器，因此非常感谢您的反馈。

Answer 1

问题在于以下陈述

select external_users.external_user_id into user_id_temp
  from external_users
  join financial_accounts
    using (external_user_id)
  join payments
    on financial_accounts.account_number = payments.sending_account_number
  where financial_accounts.account_number = payments.sending_account_number;

USING子句将EXTERNAL_USERS.EXTERNAL_USER_ID和FINANCIAL_ACCOUNTS.EXTERNAL_USER_ID合并到一个EXTERNAL_USER_ID字段中，因此您无法再说EXTERNAL_USERS.EXTERNAL_USER_ID。将语句更改为

select external_user_id
  into user_id_temp
  from external_users
  join financial_accounts
    using (external_user_id)
  join payments
    on financial_accounts.account_number = payments.sending_account_number
  where financial_accounts.account_number = payments.sending_account_number;

并尝试一下。

分享并享受。

触发器 - SQL语句忽略错误

1 个答案: