Question

我正在尝试在收到此错误时写入触发器，它是第一次遇到此类错误，并且我的搜索都没有导致我的情况，请检查这是触发器：

create or replace trigger TR_new_student    
for insert on Students
compound trigger
    IDs                 students.ID%type;
    ID_user             students.ID_u%type;
    password            users.password%type;
    cand_m1             master.ID_master%type;
    cand_m2             master.ID_master%type;
    cand_m3             master.ID_master%type;
    cand_password_m1    users.password%tyPe;
    cand_password_m2    users.password%type;
    cand_password_m3    users.password%type;
    cand_password_m4    users.password%type;
    username            users.username%type;
    type class_type     is TABLE OF class%rowtype index by PLS_integer;
    class_tab           class_type;
    part1 varchar2(12);
before each row 
is
begin
    :new.classes_accepte:='N';
    :new.n_download:=0;
    :new.n_msg_adm:=0;
    :new.n_msg_res:=0;
    :new.date_last_download:=sysdate;
    :new.date_last_m_a:=sysdate;
    :new.date_last_m_r:=sysdate;
    :new.year_insc:=get_annee_scolaire;
    :new.current_year:=get_annee_scolaire;
    select ID_M1,ID_M2,ID_M3,password_m1,password_m2,password_m3,password_m4
    into cand_m1,cand_m2,cand_m3,cand_password_m1,cand_password_m2,cand_password_m3,cand_password_m4
    from candidate c
    where c.ID_c=:new.ID_c and c.year=:new.year_insc;
    password :=
                CASE 
                        when cand_M1=:new.current_master    then    cand_password_m1
                        when cand_M2=:new.current_master    then    cand_password_m2
                        when cand_M3=:new.current_master    then    cand_password_m3
                        else cand_password_m4
                end;
    if password != :new.first_pass then raise_application_error(-20003,'Le mot de passe n''est pas valide');
    end if;
    SELECT SUBSTR(:new.Fname, 1, 12) into part1 FROM DUAL;
    username:=part1||TO_CHAR(:new.ID);
    ID_user:=ID_u_seq.currval;
    :new.ID_u:=ID_user;
    ID_s:=ID_seq.nextval;
    :new.ID:=ID_s;
    insert          
    into users 
    values (ID_user,username,password,1);

    insert 
    into inscriptions (year,date_insc,old_new,ID,master_ID,succeeded,password)
    values (:new.year_insc,sysdate,'N',:new.ID,:new.current_master,:new.current_master,'P',password);
    select *
    BULK COLLECT INTO   class_tab   
    from class d
    where d.ID_master=:new.current_master and d.optionnel='N' and d.available='Y';

    forall i in indices of class_tab
    insert into Grades
    values (class_tab(i).ID_class,:new.current_master,:new.ID,:new.year_insc,class_tab(i).graded,class_tab(i).credit,class_tab(i).semestre,class_tab(i).partial_flag,class_tab(i).final_1_flag,class_tab(i).project_flag,class_tab(i).final_2_flag,class_tab(i).partial_percent,class_tab(i).final_percent,class_tab(i).project_percent,'N','N','N','N','N',0,0,0,0,0,sysdate,:new.ID_u,'P',class_tab(i).description);
end before each row;
after statement 
is  
begin
    execute immediate 'Create or replace view vue_stu'||IDs||'
                    as select province,circonscription,city,region,fam_status,cur_province,cur_cir,cur_region,cur_city,street,property,floor,phone,picture
                    from students
                    where ID_u='||ID_user||'';
    execute immediate 'Grant update on vue_stu'||IDs||' to C##'||username||'';
end after statement;
end TR_new_student;
/

这是我收到的错误：
ORA-01775：同义词的循环链

任何人都可以告诉我这个错误的可能来源或我如何解决它？提前谢谢你：）

Answer 1

在编译触发器之前，您应该执行以下语句：

alter session set events '1775 trace name errorstack level 3;

然后编译触发器。这将创建一个跟踪文件。提供指向创建的跟踪文件的链接。

什么循环的同义词链意味着什么？

1 个答案: