Create LOV based on view with problem - repost

Hi,
I have the following scenario:
1. Create a view based on several tables from a remote database using db link.
2. Create a LOV based on the created view. In the LOV, I have the where clause
" where user_name = portal30.wwctx_api.get_user" because I only want individual
portal user to see his/her own choices.
However, when I try to test the LOV, it just hangs.
3. If I create a table based on the created view, and create a LOV based on the newly
created table, also use the same where clause -
"where user_name = portal30.wwctx_api.get_user". The LOV returns correctly.
Why is this happens? And what can I do to make the Lov works from a view instead of table?
Thanks;
Kelly.

Hi Erwin,
I have a similar situation.
Tabular form based on a view. The view contains a table in a another instance via dblink and everything works fine.
The only one difference between my and your view is that my "instead of" view is only for UPDATE. You must to have "intead of" trigger only for UPDATE. Insert and delete works fine withoust "instead of" trigger.
So, try to delete INSERT and DELETE words from your "INSTEADOFBUBA" trigger.
hope it helps,
Mzz

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    insert into table_1(id) values (2);
    insert into table_1(id) values (3);
    insert into table_1(id) values (4);
    insert into table_1(id) values (5);
    insert into table_2(id) values (10);
    insert into table_2(id) values (12);
    insert into table_2(id) values (13);
    insert into table_2(id) values (14);
    insert into table_2(id) values (15);
    update table_1 set val='Table1 val:'||id;
    update table_2 set val='Table2 val:'||id;
    create view v_table_all as
    select * from table_1
    view V_TABLE_ALL created.
    select * from v_table_all;
    ID                     VAL                                                                                                 
    0                      Table1 val:0                                                                                        
    2                      Table1 val:2                                                                                        
    3                      Table1 val:3                                                                                        
    4                      Table1 val:4                                                                                        
    5                      Table1 val:5                                                                                        
    select column_name, updatable, insertable, deletable
    from user_updatable_columns
    where table_name = 'V_TABLE_ALL'
    COLUMN_NAME                    UPDATABLE INSERTABLE DELETABLE
    ID                             YES       YES        YES      
    VAL                            YES       YES        YES      
    update v_table_all set val='XXX changed' where id = 3;
    1 row updated.
    select * from table_1;
    ID                     VAL                                                                                                 
    0                      Table1 val:0                                                                                        
    2                      Table1 val:2                                                                                        
    3                      XXX changed                                                                                         
    4                      Table1 val:4                                                                                        
    5                      Table1 val:5                                                                                        
    rollback;
    select * from table_1;
    ID                     VAL                                                                                                 
    0                      Table1 val:0                                                                                        
    2                      Table1 val:2                                                                                        
    3                      Table1 val:3                                                                                        
    4                      Table1 val:4                                                                                        
    5                      Table1 val:5                                                                                        
    create or replace view v_table_all as
    select * from table_1
    union select * from table_2;
    view V_TABLE_ALL created.
    select * from v_table_all;
    ID                     VAL                                                                                                 
    0                      Table1 val:0                                                                                        
    2                      Table1 val:2                                                                                        
    3                      Table1 val:3                                                                                        
    4                      Table1 val:4                                                                                        
    5                      Table1 val:5                                                                                        
    10                     Table2 val:10                                                                                       
    12                     Table2 val:12                                                                                       
    13                     Table2 val:13                                                                                       
    14                     Table2 val:14                                                                                       
    15                     Table2 val:15  
    select column_name, updatable, insertable, deletable
    from user_updatable_columns
    where table_name = 'V_TABLE_ALL'
    COLUMN_NAME                    UPDATABLE INSERTABLE DELETABLE
    ID                             NO        NO         NO       
    VAL                            NO        NO         NO       
    trying update:
    update v_table_all set val='XXX changed' where id = 3;
    SQL-Fehler: ORA-01732: Datenmanipulationsoperation auf dieser View nicht zulässig
    01732. 00000 -  "data manipulation operation not legal on this view"
    *Cause:   
    *Action:
    drop view v_table_all;
    view V_TABLE_ALL dropped.all is ok before this point.
    now we want create a new materialized view with some query
    create  materialized view v_table_all
    as
    select * from table_1
    union all select * from table_2 ;
    materialized view V_TABLE_ALL created.
    select column_name, updatable, insertable, deletable
    from user_updatable_columns
    where table_name = 'V_TABLE_ALL'
    COLUMN_NAME                    UPDATABLE INSERTABLE DELETABLE
    ID                             YES       YES        YES      
    VAL                            YES       YES        YES       it seems to be ok with update.
    but...
    update v_table_all set val='XXX changed' where id = 3;
    SQL-Fehler: ORA-01732: Datenmanipulationsoperation auf dieser View nicht zulässig
    01732. 00000 -  "data manipulation operation not legal on this view"
    *Cause:   
    *Action:How can solve this issue??
    Any suggestion

    Looks like user_updatable_columns sort of thinks the MV is just a table - I don't know about that...
    An MV on a single table can be updated - I tried that and it works:
    create materialized view mv_table_1 for update
    as
    select * from table_1;I noticed [url http://download.oracle.com/docs/cd/E11882_01/server.112/e16579/advmv.htm#sthref294]examples stating the UNION ALL needs a "marker" so Oracle can know from the data which source table a row in the MV originates from - like this:
    create materialized view v_table_all for update
    as
    select 'T1' tab_id, table_1.* from table_1
    union all
    select 'T2' tab_id, table_2.* from table_2 ;But that also fails (the "marker" requirement was specifically for FAST REFRESH, so it was just a long shot ;-) )
    What are you planning to do?
    <li>Create the MV.
    <li>Update records in the MV - which then is no longer consistent with the source data.
    <li>Schedule a complete refresh once in a while - thereby overwriting/losing the updates in the MV.
    If that is the case, I suggest using a true table rather than an MV.
    <li>Create table t_table_all as select ... .
    <li>Update records in the table - which then is no longer consistent with the source data.
    <li>Schedule a job to delete table and insert into table select ... once in a while - thereby overwriting/losing the updates in the table.
    In other words a kind of "do it yourself MV".
    I cannot see another way at the moment? But perhaps try in the data warehousing forum - the people there may have greater experience with MV's ;-)

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