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If a view is created by using a 'SELECT *' statement, the view is not updated when a new column is added to the base table. An example:
create table dm_tab(N integer, M integer) organize by row;
insert into dm_tab(N, M) values (1, 2);
create view dm_vw1 as select * from dm_tab;
alter table dm_tab add column K integer default 3;
-- The new column K is not part of the view:
select * from dm_vw1;
This means that we need to re-create our views if an underlying table has changed. Because we have more than 30,000 views along with table alterations on a regular basis in our software release life cycle, we ask you to introduce a feature to automate the re-creation of the affected views.
The feature could be implemented in DB2 via an additional procedure similar to the ADMIN_REVALIDATE_DB_OBJECTS procedure. Alternatively it could be embedded in SQL via a 1st level construct of the language like for example a new optional clause in the CREATE VIEW statement.
Please notice that the feature which we are asking for would correspond to the standard behavior of Oracle databases.
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