RE: Data Pump over NETWORK_LINK

From: Goulet, Richard <Richard.Goulet_at_parexel.com>
Date: Tue, 21 Apr 2009 11:45:04 -0400
Message-ID: <23C4836D8E9C5F4280A66C0C247BC16F272E2B83_at_US-BOS-MX011.na.pxl.int>

Oh Ian, it's not that long. Here is a stored procedure that I like:

   procedure schema_refresh(schema in varchar2, link in varchar2) as    h1 NUMBER := 0;
   h2 varchar2(1000);
   dmy number := 0;
   ex boolean := TRUE;
   fl number := 0;
   stmt varchar2(1000);
   schema_exp varchar2(100);
   blksz number := 0;
   bad_purge exception;
   bad_link exception;
   begin

      schema_exp := 'in('''||upper(schema)||''')';
      utl_file.fgetattr('DATA_PUMP_DIR', schema||'.log', ex, fl, blksz);
      if(ex = TRUE) then
utl_file.fremove('DATA_PUMP_DIR',schema||'.log');
      end if;
      h1 := purge_schema(schema);
      if(h1 != 0) then raise bad_purge;
      end if;
      select count(*) into dmy from user_db_links
      where db_link = upper(link);
      if(dmy = 0) then raise bad_link;
      end if;
      h1 := dbms_datapump.open (operation => 'IMPORT', job_mode =>

'SCHEMA', remote_link => link, job_name => upper(schema)||'_EXP', version => 'COMPATIBLE');

     dbms_datapump.set_parallel(handle => h1, degree => 2);
     dbms_datapump.add_file(handle => h1, filename => schema||'.log',
directory => 'DATA_PUMP_DIR', filetype => 3);
     dbms_datapump.set_parameter(handle => h1, name => 'KEEP_MASTER',
value => 0);
     dbms_datapump.set_parameter(handle => h1, name => 'ESTIMATE', value


=> 'STATISTICS');

     dbms_datapump.set_parameter(handle => h1, name =>
'INCLUDE_METADATA', value => 1);
     dbms_datapump.metadata_filter(handle => h1, name=>
'SCHEMA_EXPR',value => schema_exp);
     dbms_datapump.start_job(handle => h1, skip_current => 0, abort_step


=> 0);

     dbms_datapump.wait_for_job(h1, h2);
     mail_log('DATA_PUMP_DIR', schema||'.log', initcap(schema)||'.log');
     /*

utl_mail.send(sender=>'richard.goulet_at_parexel.com',recipients=>'richard. goulet_at_parexel.com', subject=>'CoreTST Dump',message=>h2);

      */
   exception

      when bad_purge then
         send_mail('richard.goulet_at_parexel.com','Failed Refresh','Schems
'||schema||' did not flush out properly. ORA-'||h1);
      when bad_link then
         send_mail('richard.goulet_at_parexel.com','Failed
Refresh','Database link '||link||' does not exist');
      when others then
         h2 := sqlerrm;
         if(h1 != 0) then dbms_datapump.stop_job(h1,1,0,0);
         end if;
         mail_log('DATA_PUMP_DIR', schema||'.log',

initcap(schema)||'.log');  

utl_mail.send(sender=>'richard.goulet_at_parexel.com',recipients=>'richard. goulet_at_parexel.com', subject=>schema||'Dump',message=>h2);

   end;

Dick Goulet
Senior Oracle DBA
PAREXEL International

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Ian Cary Sent: Tuesday, April 21, 2009 10:40 AM
To: Roger.Xu_at_dpsg.com
Cc: oracle-l_at_freelists.org; oracle-l-bounce_at_freelists.org Subject: Re: Data Pump over NETWORK_LINK

Hi Roger,

You can actually do this directly using the datapump API without the need
for an intermediary dmp file.

All you need to do is create a dblink (called e.g. mydblink) on the test database that points to the production one and run the following PL/SQL (again from the test database)

declare
  h1 number;
begin
  h1 := dbms_datapump.open(operation=>'IMPORT',

                           job_mode=>'SCHEMA',
                           remote_link=>'MYDBLINK');
  dbms_datapump.metadata_filter(handle=>h1,
                                name=>'SCHEMA_LIST',
                                value=>'''HR''');

  dbms_datapump.metadata_remap(h1,'REMAP_SCHEMA','HR','TESTHR'); end;
/

I've deliberately kept the example short but this can be expanded on to produce log information if needed.

Cheers,

Ian

|---------+----------------------------->
|         |           Roger.Xu_at_dpsg.com |
|         |           Sent by:          |
|         |           oracle-l-bounce_at_fr|
|         |           eelists.org       |
|         |                             |
|         |                             |
|         |           20/04/2009 21:05  |
|         |           Please respond to |
|         |           Roger.Xu          |
|         |                             |
|---------+----------------------------->
 
>-----------------------------------------------------------------------
---------------------------------------|

  |
|
  | To: oracle-l_at_freelists.org |
  | cc: oracle-l_at_freelists.org |
  | Subject: Data Pump over NETWORK_LINK |  

>-----------------------------------------------------------------------
---------------------------------------|

Here is how I currently copy a schema from production to dev in 10gR2 -

1. expdp system/password1 schemas=HR directory=pump_dir1 dumpfile=hr.dmp
2. FTP the dump file (hr.dmp) to the dev box
3. drop user TESTHR in the dev box
4. impdp system/password2 schemas=TESTHR directory=pump_dir2 dumpfile=hr.dmp remap_schema=HR:TESTHR
5. reset password for TESTHR (alter user TESTHR identified by ??????)

Now my question is: how do I do this over the NETWORK_LINK? What kind of DB
link I need?

Would the command looks like this?

impdp system/password2 schemas=TESTHR directory=pump_dir2 network_link=mydblink remap_schema=HR:TESTHR

Thanks

Roger

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Received on Tue Apr 21 2009 - 10:45:04 CDT