Default value? Trigger?

Question

Hi all,
I got one Oracle 10g problem here, not sure you can help me or not.
If a table has a column which has "default value" setup.
Example
CREATE TABLE KENTEMP
refno number(10),
user_create varchar2(30) Default USER not null
And it also has a trigger with following contents:
If :new.user_create is Null then
:new.user_create := 'TEST';
end if;
If I going insert a record with null value on user_create column.
In some Oracle database, the create_user will become USER, some will become "TEST".
Do you understand why?
Thanks

Answer 1

In some Oracle database, the create_user will become USER, some will become "TEST". Are you running the same INSERT statement on all these databases? Because the default value gets applied before the trigger fires, and I would expect that to be consistent across all databases.
SQL>  create table defval (col1 number, col2 varchar2(30) default user)
  2  /
Table created.
SQL> insert into defval (col1) values (1)
  2  /
1 row created.
SQL> select * from defval
  2  /
      COL1 COL2
         1 APC
SQL> create trigger defval_trg before insert on defval for each row
  2  begin
  3    if :new.col2 is null then
  4       :new.col2 := 'TEST';
  5    end if;
  6  end;
  7  /
Trigger created.
SQL> insert into defval (col1) values (2)
  2  /
1 row created.
SQL> select * from defval
  2  /
      COL1 COL2
         1 APC
         2 APC
SQL> insert into defval (col1,col2) values (3, null)
  2  /
1 row created.
SQL> select * from defval
  2  /
      COL1 COL2
         1 APC
         2 APC
         3 TEST
SQL> Cheers, APC
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