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Several of you are probably familiar with the interactive feature of the old export and import utilities. All you needed to do during an interactive export or import was type exp or imp at the command line, and Oracle would prompt you for the rest of the information. Interactive Data Pump is quite different from the interactive mode of the older utilities. As you ll see in the following sections, Data Pump s interactive mode isn t meant to be used in the same way as the exp/imp interactive mode you can t start an interactive job using the Data Pump Export (or Import) utility. You can use the interactive mode only to intervene during a running job. In Data Pump Export, you use the interactive method for one purpose only: to change some export parameters midstream while the job is still running. There are two ways to get into the interactive mode. The first is by pressing the Ctrl+C combination on your keyboard, which interrupts the running job and displays the export prompt (export>) on your screen. At this point, you can deal interactively with the Export utility, with the help of a special set of interesting commands, which I ll explain later in this chapter in the Interactive Mode Export Parameters section. The second way to enter the interactive mode of operation is by using the ATTACH command. If you are at a terminal other than the one where you started the job, you can attach to the running job by specifying the ATTACH parameter.

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In Data Pump, the interactive mode means that the export or import job stops logging its progress on the screen and displays the export> (or import>) prompt. You can enter the special interactive commands at this point. Note that the export or import job keeps running throughout, without any interruption.

You can also perform Data Pump Export and Import operations easily through the OEM Database Control interface. To use this feature, start the Database Control, select Maintenance, and then choose Utilities. On the Utilities page, you can see the various choices for exporting and importing of data.

When a scheduled cron task is run, it may or may not create output. Since there is no interactive session attached to the task, the output, if any, is sent to the owner of the crontab file via an e-mail that has the subject set to the cron entry, and the body of the message as the output of the job. This is the e-mail message I received from the example of a complex cron entry shown earlier:

As in the case of the regular export utilities, you can perform Data Pump Export jobs in several modes: Full export mode: You use the FULL parameter when you want to export the entire database in one export session You need the EXPORT_FULL_DATABASE role to use this mode Schema mode: If you want to export a single user s data and/or objects only, you must use the SCHEMAS parameter Tablespace mode: By using the TABLESPACES parameter, you can export all the tables in one or more tablespaces If you use the TRANSPORT_TABLESPACES parameter, you can export just the metadata of the objects contained in one or more tablespaces You may recall that you can export tablespaces between databases by first exporting the metadata, copying the files of the tablespace to the target server, and then importing the metadata into the target database.

Table mode: By using the TABLES parameter, you can export one or more tables The TABLES parameter is identical to the TABLES parameter in the old export utility Schema mode is the default mode for Data Pump Export and Import jobs If you log in as follows, for example, Data Pump will automatically perform a full export of all of SYSTEM s objects: $ expdp system/sammyy1 If you are the SYSTEM user, you can export another schema s objects by explicitly using the SCHEMAS parameter, as shown in Listing 14-1 Listing 14-1 A Data Pump Export Using the Schema Mode $ expdp system/sammyy1 DUMPFILE=scottdmp SCHEMAS=SCOTT EXPORT: Release 102000 - Beta on Wednesday, 16 March, 2005 18:24:58 With the Partitioning, OLAP and Data Mining options Master table "SCOTT""SYS_SQL_FILE_SCHEMA_01" successfully loaded/unloaded Starting "SYSTEM""SYS_EXPORT_SCHEMA_01": system/******** dumpfile=scott.