RE: Using DBMS_METADATA/DBMS_REDFINITION to move all objects to another TS
- From: "Patterson, Joel" <jpatterson@xxxxxxxxxx>
- To: "mark.powell2@xxxxxx" <mark.powell2@xxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 24 Jun 2013 13:31:12 -0400
I was wondering after you have moved everything to the new tablespace, if you
cannot simply rename the tablespace? And of course rename the datafiles on
disk and in the database as well?
It seems to be faster -- so just wondering if there is some benefit not already
gained.
Joel Patterson
Database Administrator
904 928-2790
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From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Powell, Mark
Sent: Thursday, June 20, 2013 1:02 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: RE: Using DBMS_METADATA/DBMS_REDFINITION to move all objects to
another TS
Why not just issue Alter table move t_a tablespace new_t followed by alter
index i_1 rebuild tablespace new_1 ? This would be good for any tables without
long and long raw columns though this would take a down window. Otherwise
using dbms_redefiniton for online moves should work but it is a lot more work.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Rich Jesse
Sent: Thursday, June 20, 2013 12:26 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Using DBMS_METADATA/DBMS_REDFINITION to move all objects to another TS
Howdy,
In 11.2.0.3, we're archiving a good portion of data from Production ERP DB to
Production Archive DB. All tables are in one tablespace, all indexes in
another, as designed by 3rd party ERP. In order to recover the 100s of GB of
disk post-archive, my plan is to:
1) Create new TS big enough to handle all tables and indexes.
2) Use DBMS_METADATA to create new tables and indexes in new TS
3) Use DBMS_REDEFINITION to online move data to new TS
4) Drop/recreate old TS
5) Use DBMS_METADATA to create new tables and indexes in original TSs
6) Use DBMS_REDEFINITION to online move data to original TSs
7) Drop new TS
The reason I need to use DBMS_METADATA is for the requirement to move the
tables and indexes to a new TS. DBMS_REDEFINITION will not do that.
The problem I'm having is how to remap each index name to a new name in
DBMS_METADATA. Basically, I'm trying to use this to grab the remapped DDL for
each index on a given table:
v_idx_handle := DBMS_METADATA.OPEN('INDEX');
DBMS_METADATA.SET_FILTER(v_idx_handle, 'BASE_OBJECT_SCHEMA', v_schema);
DBMS_METADATA.SET_FILTER(v_idx_handle, 'BASE_OBJECT_NAME', v_source_table);
v_ddl_xform := DBMS_METADATA.ADD_TRANSFORM(v_idx_handle,'MODIFY');
DBMS_METADATA.SET_REMAP_PARAM(v_ddl_xform, 'REMAP_TABLESPACE', v_source_idx_ts,
v_dest_ts); --DBMS_METADATA.SET_REMAP_PARAM(v_ddl_xform, 'REMAP_NAME', ???,
???||'_NEW'); v_ddl_xform := DBMS_METADATA.ADD_TRANSFORM(v_idx_handle,'DDL');
LOOP
v_ddl := DBMS_METADATA.FETCH_DDL(v_idx_handle);
...
But how does one remap the name in the transform (commented out) when it's not
known until it's DDL is fetched? Or am I looking at some regexp in the
post-FETCH_DDL?
Thanks!
Rich
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