Oracle Data Pump Export/Import

Oracle Data Pump Export :-
Oracle Data Pump utility is used for exporting data and metadata into set of operating system files and it is newer, faster and flexible alternative to “export/import” utilities.

1. Create directory object as SYS user.
SQL> create or replace directory export_dir as '/oradata/export’;

2. Grant Read/Write privilege on the directory to the user, who invokes the Data pump export.
SQL> grant read,write on directory export_dir to test_user;

3. Take Data Pump Export

Click here to see Roles/privileges required for Export modes.

Oracle data pump export examples for all 5 modes.

(i) Full Database Export
$ expdp test_user/test123 full=y directory=export_dir dumpfile=expdp_fulldb.dmp logfile=expdp_fulldb.log

(ii) Schema Export
$expdp test_user/test123 schemas=test_user directory= export _dir dumpfile=expdp_test_user.dmp logfile=expdp_test_user.log

If you want to export more than one schema then specify the schema names separated by comma.

(iii)Table Export
$ expdp test_user/test123 tables=emp,dept directory= export _dir dumpfile=expdp_tables.dmp logfile=expdp_tables.log

You can specify more than one table.

(iv) Tablespace Export
$ expdp test_user/test123 tablespaces=test_user_tbs directory= export _dir dumpfile=expdp_tbs.dmp logfile=expdp_tbs.log

You can specify more than one tablespace.

(v) Transportable tablespace
$ expdp test_user/test123 transport_tablespaces=test_user_tbs transport_full_check=y directory= export _dir dumpfile=expdp_trans_tbs.dmp logfile=expdp_trans_tbs.log

Click here to learn more on Transportable Tablespace with examples.

Oracle Data Pump Import :-
Data Pump Import utility is used for loading an export dump files into a target system and we can load one or more files.

Copy the dump file to the target system where you to import.

1. Create directory object as SYS user.
SQL> create directory import_dir as '/oradata/import';

2. Grant Read/Write privilege on the Directory to the user, who invokes the Data Pump import.
SQL> grant read,write on directory import_dir to test_user;

3. Import the data using Data Pump Import.

Oracle data pump import examples for all 5 modes.

(i) Full Database Import
$ impdp test_user/test123 full=Y directory=imp_dir dumpfile=expdp_fulldb.dmp logfile=imp_fulldb.log

(ii) Schema Import
$impdp test_user/test123 schemas=test_user directory=imp_dir dumpfile=expdp_test_user.dmp Logfile=impdp_test_user.log

(iii) Table Import
$ impdp test_user/test123 tables=emp,dept directory=imp_dir dumpfile=expdp_tables.dmp logfile=impdp_tables.log

(iv) Tablespace Import
$ impdp test_user/test123 tablespaces=test_user_tbs directory=imp_dir dumpfile=expdp_tbs.dmp logfile=impdp_tbs.log

Above example imports all tables that have data in tablespaces test_user_tbs and it assumes that the tablespaces already exist.

(v) Transportable Tablespace
Click here to to import data using Transportable Tablespace method.

Common Errors with Data pump import (impdp) utility:-

1. ORA-31631: privileges are required
   ORA-39122: Unprivileged users may not perform REMAP_SCHEMA remapping
Cause: A user attempted to remap objects during an import but lacked the IMPORT_FULL_DATABASE privilege.
Action: Retry the job from a schema that owns the IMPORT_FULL_DATABASE privilege.

2. ORA-31631: privileges are required
    ORA-39161: Full database jobs require privileges
Cause: Either an attempt to perform a full database export without the EXP_FULL_DATABASE role or an attempt to perform a full database import over a network link without the IMP_FULL_DATABASE role.
Action: Retry the operation in a schema that has the required roles.

3. ORA-01950: no privileges on tablespace "string"
    Cause: User does not have privileges to allocate an extent in the specified tablespace.
   Action: Grant the user the appropriate system privileges or grant the user space resource on the tablespace.

Click here to learn Roles/ privileges required for Data pump Export and Import.

4. import done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
    IMP-00017: following statement failed with ORACLE error 3113:
    "BEGIN "
    "SYS.DBMS_RULE_ADM.GRANT_SYSTEM_PRIVILEGE   SYS.DBMS_RULE_ADM.CREATE_EVALUATIO" "N_CONTEXT_OBJ, 'SYS',TRUE);"
Cause: Import fails while executing the following command.
Action: Login as sys and run the following scripts
$ORACLE_HOME/rdbms/admin/dbmsread.sql
$ORACLE_HOME/rdbms/admin/prvtread.plb

Please see the Data pump Export and Import related documents:
Click here for Data Pump Export modes and Interfaces.

Regards,
Satishbabu Gunukula
http://www.oracleracexpert.com/