Oracle Database 11 g - Online Public Access Catalog

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326 CHAPTER 7 ■ DATA PUMPExport and Import of PartitionsOracle Database 11g adds the ability to allow partitions to be exported and imported with DataPump using the TRANSPORTABLE=ALWAYS option. In previous releases, the transportable tablespacemechanism of Data Pump could be specified only at the tablespace level.Now, Oracle Database 11g provides the mechanism to export/import partitions/subpartitionswithout having to move an entire table or exchange partitions by introducing the PARTITION_OPTIONS parameter. The default behavior is to departition a partitioned table export to a newtable at import time. If the TRANSPORTABLE option is not set during export or the partition nameis not specified as a filter, the expected behavior would be none.Allowable values for PARTITION_OPTIONS are as follows:• none: Creates the table as it was on the source database. This option cannot be used if thetransportable option was set with the partition/subpartition filter during the export.• departition: Creates each partition/subpartition as a new table. The new table namewill be a derived name from the table and partition name. If the export was performedwith the TRANSPORTABLE option and partition/subpartition was specified, the importmust be done using the departition option.• merge: Combines all partitions/subpartitions into a single table. This option cannot be usedif the TRANSPORTABLE option was set with the partition/subpartition filter during the export.Let’s take a look at an example of how to use the departition option to import a singlepartition of a table. Here we have a list-partitioned table called KB:SQL> create table kb2 (doc_id number,3 category varchar2(55),4 note varchar2(4000))5 partition by list (category)6 (7 partition p_dg values ('DG') tablespace kb1,8 partition p_plsql values ('PLSQL') tablespace kb2,9 partition p_default values (default) tablespace kb310* )/Table created.By querying the DBA_TAB_PARTITIONS view, you can confirm that the P_PLSQL partitionresides on the KB2 tablespace. We will perform a single row insert into the P_PLSQL partitionwith the DOC_ID of 1001:SQL> insert into kb2 values3 (1001, 'PLSQL', 'PL/SQL in Oracle Database 11g is faster and better!')4 /1 row created.
CHAPTER 7 ■ DATA PUMP 327Document identifier 1001 will be established as the baseline data for this demonstration.Behind the scenes, the KB2 tablespace is converted into a read-only tablespace. Next, we unloadthe P_PLSQL partition of the KB table using Data Pump export with the TRANSPORTABLE=ALWAYSoption, as shown here:DBA11g > expdp tables=sh.kb:p_plsql userid=sh/sh \directory=dbadir dumpfile=p_plsql.dmp \logfile=logdir_p_plsql.log \reuse_dumpfiles=Y \transportable=alwaysExport: Release 11.1.0.6.0 - Production on Saturday, 01 September, 2007 23:46:03Copyright (c) 2003, 2007, Oracle. All rights reserved.Connected to: Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsStarting "SH"."SYS_EXPORT_TABLE_01": tables=sh.kb:p_plsql userid=sh/********directory=dbadir dumpfile=p_plsql.dmp logfile=logdir_p_plsql.logtransportable=alwaysProcessing object type TABLE_EXPORT/TABLE/PLUGTS_BLKProcessing object type TABLE_EXPORT/TABLE/TABLEProcessing object type TABLE_EXPORT/TABLE/END_PLUGTS_BLKMaster table "SH"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded******************************************************************************Dumpfile set for SH.SYS_EXPORT_TABLE_01 is:/home/oracle/p_plsql.dmp******************************************************************************Datafiles required for transportable tablespace KB2:+DATA/dba11g/datafile/kb2.294.632183817Job "SH"."SYS_EXPORT_TABLE_01" successfully completed at 23:46:14The Data Pump export log indicates that the KB2 tablespace datafile resides in the DATAdiskgroup in the ASM instance. The datafile, +DATA/dba11g/datafile/kb2.294.632183817, isrequired to transport the KB2 tablespace.We will now take the Data Pump export file p_plsql.dmp and the +DATA/dba11g/datafile/kb2.294.632183817 datafile and perform a copy of the datafile followed by an import intoanother database. The easiest way to take a datafile out of ASM is to copy the datafile out ofASM to the file system using the cp command (another Oracle Database 11g new feature,discussed in detail in Chapter 9). Here the +DATA/dba11g/datafile/kb2.294.632183817 file iscopied to the /tmp directory on the operating system:ASMCMD [+] > cp -irf +DATA/dba11g/datafile/kb2.294.632183817 /tmp/kb2.dbfsource +DATA/dba11g/datafile/kb2.294.632183817target /tmp/kb2.dbfcopying file(s)...file, /tmp/kb2.dbf, copy committed.
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The EXPERT’s VOIce ® IN ORACLEAl
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■CONTENTSixSQL*Plus New Features
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xxiv■INTRODUCTIONPerformance Mana
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266 CHAPTER 6 ■ BACKUP AND RECOVE
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416 CHAPTER 10 ■ DATA GUARD• Lo
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566 ■INDEXadvise failure command,
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