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Databases and Refreshing Test Data


1. Export Prod Database

The procedure SCHEMA_REFRESH.EXPORT_PROD creates the export file. This procedure is the API for the export Data Pump.This is where Data Pump export utility is executed from the Test server against the production database remotely. The export dump file is saved on the Test server; see Listing 1.


procedure export_prod
as   
  ind NUMBER;              -- Loop index
  h1 NUMBER;               -- Data Pump job handle
  percent_done NUMBER;     -- Percentage of job complete
  job_state VARCHAR2(30);  -- To keep track of job state
  le ku$_LogEntry;         -- For WIP and error messages
  js ku$_JobStatus;        -- The job status from get_status
 -- jd ku$_JobDesc;          -- The job description from get_status
  sts ku$_Status;          -- The status object returned by get_status

begin

h1 := dbms_datapump.open (operation => 'EXPORT', remote_link => 'ESCIS.ETA.DIR.LABOR.GOV', job_mode => 'SCHEMA',  version => 'COMPATIBLE');

dbms_datapump.set_parallel(handle => h1, degree => 1);

dbms_datapump.add_file(handle => h1, filename => 'EXPDAT.LOG',  filetype => 3);

DBMS_DATAPUMP.metadata_filter (HANDLE =>h1,NAME => 'EXCLUDE_PATH_EXPR',VALUE=>'IN(''JOB'')'); 
DBMS_DATAPUMP.metadata_filter (HANDLE =>h1,NAME => 'EXCLUDE_PATH_EXPR',VALUE=>'IN(''SYNONYM'')'); 

dbms_datapump.metadata_filter(handle => h1, name => 'NAME_EXPR', value =>'!=''MULTIMEDIA''' , object_type => 'TABLE');
dbms_datapump.add_file(handle => h1, filename => 'refresh.dmp', filetype => 1);
dbms_datapump.metadata_filter(handle => h1, name => 'SCHEMA_EXPR', value => 'IN(''WEB_USER'', ''R11'' )');
dbms_datapump.start_job(handle => h1, skip_current => 0, abort_step => 0);

  percent_done := 0;
  job_state := 'UNDEFINED';
  while (job_state != 'COMPLETED') and (job_state != 'STOPPED') loop
    dbms_datapump.get_status(h1,
           dbms_datapump.ku$_status_job_error +
           dbms_datapump.ku$_status_job_status +
           dbms_datapump.ku$_status_wip,-1,job_state,sts);
    js := sts.job_status;

    if js.percent_done != percent_done
    then
      dbms_output.put_line('*** Job percent done = ' ||
                           to_char(js.percent_done));
      percent_done := js.percent_done;
    end if;

-- If any work-in-progress (WIP) or error messages were received for the job,
-- display them.

   if (bitand(sts.mask,dbms_datapump.ku$_status_wip) != 0)
    then
      le := sts.wip;
    else
      if (bitand(sts.mask,dbms_datapump.ku$_status_job_error) != 0)
      then
        le := sts.error;
      else
        le := null;
      end if;
    end if;
    if le is not null
    then
      ind := le.FIRST;
      while ind is not null loop
        dbms_output.put_line(le(ind).LogText);
        ind := le.NEXT(ind);
      end loop;
    end if;
  end loop;

Listing 1: Export Prod

Note: The command below shows how the export is performed remotely:


 h1 := dbms_datapump.open (operation => 'EXPORT', remote_link =>        'ESCIS.ETA.DIR.LABOR.GOV', job_mode => 'SCHEMA',  version => 'COMPATIBLE');

where 'ESCIS.ETA.DIR.LABOR.GOV' is name of the database link that's linked to the Production database.

Note: The following excerpt from Listing 1 shows how to list schemas to be exported:


dbms_datapump.metadata_filter(handle => h1, name => 'SCHEMA_EXPR', value => 'IN(''WEB_USER'', ''R11'' )');

where the schema names to be exported are "WEB_USER" and "R11".

Note: The following excerpt from Listing 1 shows how to exclude tables from the export:


dbms_datapump.metadata_filter(handle => h1, name => 'NAME_EXPR', value =>'!=''MULTIMEDIA''' , object_type => 'TABLE');
	

where "MULTIMEDIA" is the name of my table to be excluded.


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