Re: Relocate indexes during datapump import

From: Mayen Shah <mshah_at_travelclick.com>
Date: Tue, 3 Mar 2015 12:22:46 +0000
Message-ID: <3A6DC8AA-9C73-4E31-87F5-BBF23B01F1B2_at_travelclick.com>

Haven't tried this but may be worth testing. You can do import with exclude=index and then second import only for indexes with remap tablespace.

• Mayen

On Mar 3, 2015, at 4:03 AM, John Dunn <JDunn_at_sefas.com<mailto:JDunn_at_sefas.com>> wrote:

Thanks for all your suggestions.

I think what I will do is use alter index to move the indexes after the import.

Seems simpler!

Thanks again

John

From: Alexey B. Danchenkov [mailto:dabron_at_hotmail.com] Sent: 02 March 2015 19:05
To: Kim Berg Hansen; John Dunn
Cc: oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Subject: RE: Relocate indexes during datapump import

Actually, that is the reason why I have advised Jogn about using Data Pump API for this purpose ;)

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Date: Mon, 2 Mar 2015 19:53:51 +0100
Subject: Re: Relocate indexes during datapump import From: kibeha_at_gmail.com<mailto:kibeha_at_gmail.com> To: JDunn_at_sefas.com<mailto:JDunn_at_sefas.com> CC: dabron_at_hotmail.com<mailto:dabron_at_hotmail.com>; oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Interesting difference (maybe) between command line impdp and dbms_datapump.

Take a look at TRANSFORM:

DBMS_DATAPUMP.METADATA_TRANSFORM (    handle IN NUMBER,

   name IN VARCHAR2,

   value IN VARCHAR2,

   object_type IN VARCHAR2 DEFAULT NULL); Command line version for impdp:

TRANSFORM = transform_name:value[:object_type] The command line has the optional object_type corresponding to the optional function parameter.

Now look at REMAP:

DBMS_DATAPUMP.METADATA_REMAP (    handle IN NUMBER,

   name IN VARCHAR2,

   old_value IN VARCHAR2,

   value IN VARCHAR2,

   object_type IN VARCHAR2 DEFAULT NULL); The function has the same optional object_type as TRANSFORM, but that does not exist in command line:

REMAP_TABLESPACE=source_tablespace:target_tablespace It may not be quite comparable, as function METADATA_REMAP handles the functionality of several METADATA_* parameters of impdp. But still a bit funny that the functionality of remapping tablespaces for a specific object type seems to be available in datapump, but only when using the API and not the command line?

You might just for fun try in a test environment to do REMAP_TABLESPACE=from_tablespace:to_tablespace:INDEX and see if it works even if undocumented ;-) (Don't get your hopes high - it's a long shot...)

Alternatively consider if you can use the DBMS_DATAPUMP api? If you need it to be scriptable, couldn't you as alternative to scripting a call to impdp, instead script a call to sqlplus executing a DBMS_DATAPUMP anonymous block? That would give you the option to use all of the functionality of the API.

If that's not an option for some reason, I guess the alternative would be two impdp jobs - one that uses EXCLUDE=index without remap tablespace and then one that uses INCLUDE=index and has REMAP_TABLESPACE.

Regards

Kim Berg Hansen

http://dspsd.blogspot.com
kibeha_at_gmail.com<mailto:kibeha_at_gmail.com> _at_kibeha

On Mon, Mar 2, 2015 at 4:17 PM, John Dunn <JDunn_at_sefas.com<mailto:JDunn_at_sefas.com>> wrote: Thanks for the quick response.
Can I do the same using the command line impdp command?

I am struggling to find an example of that.

John

From: Alexey B. Danchenkov [mailto:dabron_at_hotmail.com<mailto:dabron_at_hotmail.com>] Sent: 02 March 2015 14:17
To: John Dunn; oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Subject: RE: Relocate indexes during datapump import

Hi John,

Yes, it is possible to relocate indexes separately to a different tablespace using Data Pump. For example, you can use a PL/SQL code which uses Data Pump API. This sample code moves only indexes from OLDTABLESPACE' to NEWTABLESPACE:

DECLARE
  hd NUMBER;
BEGIN
  hd := DBMS_DATAPUMP.OPEN(operation => 'IMPORT',job_mode => 'FULL',remote_link => NULL,job_name => 'DDD',version => 'COMPATIBLE' );

  DBMS_DATAPUMP.ADD_FILE( handle => hd, filename => 'dumpfile.dmp', directory => 'EXPDIR', filetype => DBMS_DATAPUMP.KU$_FILE_TYPE_DUMP_FILE  );
  DBMS_DATAPUMP.ADD_FILE( handle => hd, filename => 'logfile.log', directory => 'EXPDIR', filetype => DBMS_DATAPUMP.KU$_FILE_TYPE_LOG_FILE  );
  DBMS_DATAPUMP.SET_PARAMETER( handle => hd, name => 'REUSE_DATAFILES', value => 0 );
  DBMS_DATAPUMP.SET_PARAMETER( handle => hd, name => 'SKIP_UNUSABLE_INDEXES', value => 0 );
  DBMS_DATAPUMP.METADATA_REMAP ( handle => hd, name => 'REMAP_TABLESPACE', old_value => 'OLDTABLESPACE', value => 'NEWTABLESPACE', object_type => 'INDEX' );
  DBMS_DATAPUMP.SET_PARAMETER( handle => hd, name => 'TABLE_EXISTS_ACTION', value => 'SKIP' );
  DBMS_DATAPUMP.START_JOB(handle => hd);

END;
/

cheers,
Alexey Danchenkov

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From: JDunn_at_sefas.com<mailto:JDunn_at_sefas.com> To: oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org> Subject: Relocate indexes during datapump import Date: Mon, 2 Mar 2015 14:04:38 +0000
During a datapump import is it possible to relocate indexes to a separate tablespace?

Or I do I need to do that before doing the original export?

John

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Received on Tue Mar 03 2015 - 13:22:46 CET