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impdp command tips

Oracle Database Tips by Donald BurlesonMay 21, 2015

 

Question:  I want to know how to use all of the impdp options.  I am familiar with all of the older imp directives, but I need to understand how to use impdp commands.

Answer:  The impdp (data pump import) has superseded the older imp utility but the base functionality remains much the same, but with different impdp syntax and enhancements.  Here are some of the most common impdp functions:

How do I read and write files in import?

You need to create a directory for both expdp and impdp to be able to write to the OS:

create directory dmp_dir as 'c:\Users\Don\Wm';
grant read, write on directory dmp_dir to wm;

How do I do a parameter file in impdp?

impdp ... PARFILE=my_imp.par  

How do I display the table and index definitions from a database?

expdp ... CONTENT=metadata_only DUMPFILE=my_metadata  

How do I display the table and index definitions from a expdp .dmp file?

impdp ... SQLFILE=myddl.sql DUMPFILE=my_metadata  

What is the equivalent of the "ignore-y" imp utility command.  I want to pre-create the tables and indexes.

impdp . . . content=data_only

 

 

 

 

 

 

How do I see all of the impdp commands?


impdp help=y

Import: Release 10.1.0.2.0 - Production on Saturday, 11 September, 2004 17:22

Copyright (c) 2003, Oracle.  All rights reserved.


The Data Pump Import utility provides a mechanism for transferring data objects
between Oracle databases. The utility is invoked with the following command:

     Example: impdp scott/tiger DIRECTORY=dmpdir DUMPFILE=scott.dmp

You can control how Import runs by entering the 'impdp' command followed
by various parameters. To specify parameters, you use keywords:

     Format:  impdp KEYWORD=value or KEYWORD=(value1,value2,...,valueN)
     Example: impdp scott/tiger DIRECTORY=dmpdir DUMPFILE=scott.dmp

USERID must be the first parameter on the command line.

Keyword               Description (Default)
------------------------------------------------------------------------------
ATTACH                Attach to existing job, e.g. ATTACH [=job name].

CONTENT               Specifies data to load where the valid keywords are:
                      (ALL), DATA_ONLY, and METADATA_ONLY.

DIRECTORY             Directory object to be used for dump, log, and sql files.


DUMPFILE              List of dumpfiles to import from (expdat.dmp),

                      e.g. DUMPFILE=scott1.dmp, scott2.dmp, dmpdir:scott3.dmp.

ESTIMATE              Calculate job estimates where the valid keywords are:

                      (BLOCKS) and STATISTICS.

EXCLUDE               Exclude specific object types, e.g. EXCLUDE=TABLE:EMP.


FLASHBACK_SCN         SCN used to set session snapshot back to.


FLASHBACK_TIME        Time used to get the SCN closest to the specified time.


FULL                  Import everything from source (Y).


HELP                  Display help messages (N).


INCLUDE               Include specific object types, e.g. INCLUDE=TABLE_DATA.


JOB_NAME              Name of import job to create.


LOGFILE               Log file name (import.log).


NETWORK_LINK          Name of remote database link to the source system.


NOLOGFILE             Do not write logfile.


PARALLEL              Change the number of active workers for current job.


PARFILE               Specify parameter file.


QUERY                 Predicate clause used to import a subset of a table.


REMAP_DATAFILE        Redefine datafile references in all DDL statements.


REMAP_SCHEMA          Objects from one schema are loaded into another schema.


REMAP_TABLESPACE      Tablespace object are remapped to another tablespace.


REUSE_DATAFILES       Tablespace will be initialized if it already exists (N).


SCHEMAS               List of schemas to import.


SKIP_UNUSABLE_INDEXES Skip indexes that were set to the Index Unusable state.


SQLFILE               Write all the SQL DDL to a specified file.


STATUS                Frequency (secs) job status is to be monitored where

                      the default (0) will show new status when available.

STREAMS_CONFIGURATION Enable the loading of Streams metadata


TABLE_EXISTS_ACTION   Action to take if imported object already exists.

                      Valid keywords: (SKIP), APPEND, REPLACE and TRUNCATE.
TABLES                Identifies a list of tables to import.

TABLESPACES           Identifies a list of tablespaces to import.


TRANSFORM             Metadata transform to apply (Y/N) to specific objects.

                      Valid transform keywords: SEGMENT_ATTRIBUTES and STORAGE.
                      ex. TRANSFORM=SEGMENT_ATTRIBUTES:N:TABLE.

TRANSPORT_DATAFILES   List of datafiles to be imported by transportable mode.


TRANSPORT_FULL_CHECK  Verify storage segments of all tables (N).


TRANSPORT_TABLESPACES List of tablespaces from which metadata will be loaded.

                      Only valid in NETWORK_LINK mode import operations.

VERSION               Version of objects to export where valid keywords are:

                      (COMPATIBLE), LATEST, or any valid database version.
                      Only valid for NETWORK_LINK and SQLFILE.

The following commands are valid while in interactive mode.
Note: abbreviations are allowed

Command               Description (Default)11g
------------------------------------------------------------------------------
CONTINUE_CLIENT       Return to logging mode. Job will be re-started if idle.

EXIT_CLIENT           Quit client session and leave job running.


HELP                  Summarize interactive commands.


KILL_JOB              Detach and delete job.


PARALLEL              Change the number of active workers for current job.

                      PARALLEL=.

START_JOB             Start/resume current job.

                      START_JOB=SKIP_CURRENT will start the job after skipping
                      any action which was in progress when job was stopped.

STATUS                Frequency (secs) job status is to be monitored where

                      the default (0) will show new status when available.
                      STATUS=[interval]

STOP_JOB              Orderly shutdown of job execution and exits the client.

                      STOP_JOB=IMMEDIATE performs an immediate shutdown of the
                      Data Pump job.


 
 
 
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