View and Instead of trigger

Question

Hi !
In my application I have two tables
tabA(col_A1,col_A2,col_A3) and tabB(col_B1,col_B2)I created a view
CREATE OR REPLACE VIEW  vt
AS SELECT  col_A1, col_A2, col_A3, col_B1, col_B2
     FROM  tabA  A
             LEFT OUTER JOIN  tabB  B
               ON (        A.ol_Achar = B.col_Bchar
                   OR 'A'||A.ol_Achar = B.col_Bchar ); and an instead of trigger
CREATE OR REPLACE TRIGGER vt_upd
  INSTEAD OF UPDATE ON vt
BEGIN
  UPDATE    tabA
     SET    col_A3 = :NEW.col_A3
     WHERE  col_A1 = :NEW.col_A1;
END;
/And now there are very strange behaviours on an update statement I've tried:
UPDATE vt SET col_A3=1 where col_A1=2;1.) If I try it on an Oracle instance version 10.2.0.1.0 it's OK, the update (and hence the instead of triggers) does the right thing.
2.) If I try it on an Oracle instance version 9.2.0.7.0 I get an error:
ORA-01031: insufficient privileges3.) If I change the the definition to:
CREATE OR REPLACE VIEW  vt
AS SELECT  col_A1, col_A2, col_A3, col_B1, col_B2
     FROM  tabA  A
             LEFT OUTER JOIN  tabB  B
               ON A.ol_Achar = B.col_Bchar;the update will work on 9.2.0.7.0 as well.
Any idea why there are such troubles ?
Thanks for any help,
Heinz

Answer 1

Don't have 9.2.0.7 at hand and your view definition is a bit screwed. But what I tried was
michaels>  create table taba(col_a1 varchar2(5),col_a2 varchar2(5),col_a3 varchar2(5))
Table created.
michaels>  create table tabb(col_b1 varchar2(5),col_b2 varchar2(5))
Table created.
michaels>  create or replace view vt
as
   select col_a1, col_a2, col_a3, col_b1, col_b2
     from taba a left outer join tabb b
          on (a.col_a1 = b.col_b1 or 'A' || a.col_a2 = b.col_b2)
View created.
michaels>  create or replace trigger vt_upd
   instead of update
   on vt
begin
   update taba
      set col_a3 = :new.col_a3
    where col_a1 = :new.col_a1;
end vt_upd;
Trigger created.
michaels>  update vt
   set col_a3 = 1
where col_a1 = 2
0 rows updated.
michaels>  select * from v$version
BANNER                                                         
Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
PL/SQL Release 9.2.0.8.0 - Production                          
CORE     9.2.0.8.0     Production                                      
TNS for HPUX: Version 9.2.0.8.0 - Production                   
NLSRTL Version 9.2.0.8.0 - Production Maybe time to upgrade?