Question reg. Types

Question

hi,
when I am creatating type as under:
create or replace type sop_record_journal_file as object
service_request_id sop_service_request.service_request_id%TYPE
It gives me:
SQL> show err
Errors for TYPE SOP_RECORD_JOURNAL_FILE:
LINE/COL ERROR
0/0 PL/SQL: Compilation unit analysis terminated
8/24 PLS-00201: identifier 'SOP_SERVICE_REQUEST.SERVICE_REQUEST_ID'
must be declared
How can i create type to be like the one above so that whenever i change datatype of service_request_id column in sop_service_request table, My type takes it transparently and hence i dont have to go and change it in type..
Btw, my oracle version is :
SQL> select * from v$version;
BANNER
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
PL/SQL Release 9.2.0.6.0 - Production
CORE 9.2.0.6.0 Production
TNS for Linux: Version 9.2.0.6.0 - Production
NLSRTL Version 9.2.0.6.0 - Production
thx

Answer 1

>Object Type OR Table are static things that cannot change during their life.
Understand what you are trying to say, but the above statement is incorrect.
Object types and tables are not dynamic. Nor should one be tempted to hack this and try and treat these "definitions" as dynamic.
However, they can be modified using the ALTER TYPE and ALTER TABLE commands. For example, the ALTER TYPE can be used to add a new property to the type and this can automatically be applied also to any tables based on that type definition.