尽管条件不满足，如何停止执行 oracle 触发器

Question

我根据批准级别创建了 3 个触发器。表格-> p_it_people,p_it_issues,p_it_Departments 1 个部门有 2 个审批人 -> p_it_people.approver='审批人 1' 和 p_it_people.approval_level='审批人 2' 还有 p_it_departments.approval_status=2（对于 2 个审批者）

第一个触发器通过设置 p_it_issues.approve_This=Y1'' 向 p_it_people.approver='Approver 1' 发送电子邮件以批准问题 然后 Approver 1 登录到 applicationn 并设置approve_this='Y1'

第二个触发器触发，当approve_this='Y1'（前置条件）时，设置p_it_issues.approved=1 并发送电子邮件到p_it_people.approver='Approver 2' 现在，当 Approver 2 登录并设置approve_this='Y2'--这应该触发第三个触发器。 但是，它在应用程序页面上没有发现数据异常。 没有 Approver 3，但如果没有找到 Approver 3，我也不希望触发器执行，并且 ***只需更新 p_it_issues.approved=2。

附：该方法是非常静态的，我正在寻找动态解决方案，但目前这需要通过硬编码批准级别来完成。

Code for Trigger 3:

    CREATE OR REPLACE EDITIONABLE TRIGGER  "P_IT_ISSUES_AIU_Notify_Approver_3" 
    BEFORE 
    update on P_IT_ISSUES
    for each row 
         WHEN (new.APPROVE_THIS ='Y2') declare
    v_person_id number;
    v_email varchar2(255);
    v_dept_name varchar2(50);

    begin
    :new.APPROVED :=2 ;


    select p.person_id ,p.person_email,i.dept_name into v_person_id,v_email,v_Dept_name from p_it_people p,p_it_departments i 
    where p.assigned_dept=i.dept_id and i.dept_id=:new.related_dept_id and p.approver='Approver 3' and i.approval_level!=:new.approved ;

                 APEX_MAIL.SEND( 
                     p_to => v_email, 
                     p_from => v_email, 
                     p_body =>  
                     'You have been assigned a new issue for third level approval.  ' ||chr(10)|| 
                     'The details are below. ' ||chr(10)|| 
                     chr(10)|| 
                     ' Department:'|| v_dept_name ||chr(10)|| 
                     ' Summary: '||:new.issue_summary ||chr(10)|| 
                     ' Status: '||:new.status ||chr(10)|| 
                     'Priority: '||nvl(:new.priority,'-'), 
                      p_subj => 'New Issue for Third Level Approval'); 


    end;

In case required, codes for Trigger 1 and 2 are also below:

Trigger 1:

    CREATE OR REPLACE EDITIONABLE TRIGGER  "P_IT_ISSUES_AIU_Notify_Approver_1" 
    AFTER 
    insert on P_IT_ISSUES 
    for each row 
    FOLLOWS P_IT_ISSUES_AIU_EMAIL
    declare
    v_person_id number;
    v_email varchar2(255);
    v_dept_name varchar2(50);
    begin
    select p.person_id ,p.person_email,i.dept_name into v_person_id,v_email,v_Dept_name from p_it_people p,p_it_departments i 
    where p.assigned_dept=i.dept_id and i.dept_id=:new.related_dept_id and p.approver='Approver 1' and i.approval_level!=:new.approved ;

                 APEX_MAIL.SEND( 
                     p_to => v_email, 
                     p_from => v_email, 
                     p_body =>  
                     'You have been assigned a new issue for first level approval.  ' ||chr(10)|| 
                     'The details are below. ' ||chr(10)|| 
                     chr(10)|| 
                     ' Department:'|| v_dept_name ||chr(10)|| 
                     ' Summary: '||:new.issue_summary ||chr(10)|| 
                     ' Status: '||:new.status ||chr(10)|| 
                     'Priority: '||nvl(:new.priority,'-'), 
                      p_subj => 'New Issue for First Level Approval'); 


    end;

Trigger 2:

CREATE OR REPLACE EDITIONABLE TRIGGER  "P_IT_ISSUES_AIU_Notify_Approver_2" 
BEFORE 
update on P_IT_ISSUES
for each row 
   WHEN (new.APPROVE_THIS ='Y1'  ) declare
v_person_id number;
v_email varchar2(255);
v_dept_name varchar2(50);

begin
:new.APPROVED :=1 ;


select p.person_id ,p.person_email,i.dept_name into v_person_id,v_email,v_Dept_name from p_it_people p,p_it_departments i 
where p.assigned_dept=i.dept_id and i.dept_id=:new.related_dept_id and p.approver='Approver 2'  and i.approval_level!=:new.approved;

             APEX_MAIL.SEND( 
                 p_to => v_email, 
                 p_from => v_email, 
                 p_body =>  
                 'You have been assigned a new issue for second level approval.  ' ||chr(10)|| 
                 'The details are below. ' ||chr(10)|| 
                 chr(10)|| 
                 ' Department:'|| v_dept_name ||chr(10)|| 
                 ' Summary: '||:new.issue_summary ||chr(10)|| 
                 ' Status: '||:new.status ||chr(10)|| 
                 'Priority: '||nvl(:new.priority,'-'), 
                  p_subj => 'New Issue for Second Level Approval'); 


end;

Answer 1

如果我理解正确，并且如果是第三次触发no_data_found，那么处理它；请参阅触发器底部的 exception 部分。

(...)
begin
  :new.APPROVED :=2;

  select p.person_id, p.person_email, i.dept_name 
    into v_person_id, v_email, v_Dept_name 
  from p_it_people p join p_it_departments i on p.assigned_dept = i.dept_id
  where i.dept_id = :new.related_dept_id 
    and p.approver = 'Approver 3' 
    and i.approval_level != :new.approved;

  APEX_MAIL.SEND(...);

exception
  when no_data_found then 
    -- set APPROVED anyway
    :new.APPROVED :=2;
end;