Tablespace shrink.

Question

hi
i m using oracle database 10gR2
one of my database size is 13GB and out of that used size is only 4GB. HWM has already reached to the end of datafile so i m unable to shrink the database upto 4GB(used space)
General solution to this problem is to take tablespace level export,drop tablespace ,create tablespace with 4 gb size and do import.
but i have doubt that above solution will invalid my dependent objects like synonyms and triggers, procedures and packeges in different schema
is there any other solution i can use which should not affect my dependent objects.

Answer 1

Hello User,
Yes that won't copy all the dependent object and you have manually create them. But you have a perfect solution of using dbms_redefinition packaage and it will create all the dependent objects (triggers/grants) without any extra manual work.
check this link
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_redefi.htm#CBBHFJAI
Here is specific example, create an emptry interim table under new tablespace
create table my_objects_interim as select * from my_objects where rownum < 1;
DECLARE
   v_num_errors   NUMBER;
BEGIN
   -- With Primary key
   -- README -- COMMENT OUT the one you don't need for the table either ROWID or PRIMARY KEY
   DBMS_REDEFINITION.can_redef_table (USER,
                                      'my_objects',
                                      DBMS_REDEFINITION.cons_use_pk,
                                      NULL
   -- without primary key
   DBMS_REDEFINITION.can_redef_table (USER,
                                      'my_objects',
                                      DBMS_REDEFINITION.cons_use_rowid,
                                      NULL
   -- dbms_redefinition.cons_use_pk
   -- dbms_redefinition.cons_use_rowid
   -- With Primary key
   DBMS_REDEFINITION.start_redef_table (USER,
                                        'my_objects',
                                        'my_objects_interim',
                                        NULL,
                                        DBMS_REDEFINITION.cons_use_pk,
                                        NULL,
                                        NULL
   -- without primary key
   DBMS_REDEFINITION.start_redef_table (USER,
                                        'my_objects',
                                        'my_objects_interim',
                                        NULL,
                                        DBMS_REDEFINITION.cons_use_rowid,
                                        NULL,
                                        NULL
   v_num_errors   :=
      DBMS_REDEFINITION.copy_table_dependents (USER,
                                               'my_objects',
                                               'my_objects_interim',
                                               DBMS_REDEFINITION.cons_orig_params,
                                               TRUE,
                                               TRUE,
                                               TRUE,
                                               FALSE,
                                               num_errors,
                                               FALSE
   DBMS_REDEFINITION.finish_redef_table (USER,
                                         'my_objects',
                                         'my_objects_interim',
                                         NULL
EXCEPTION
   WHEN OTHERS
   THEN
      DBMS_OUTPUT.put_line (SUBSTR (SQLERRM, 1, 200));
END;Regards
Edited by: OrionNet on Dec 23, 2008 2:10 AM