Background documentationEXPORT SCHEMA Locate this document in the navigation structure

 

You can use the EXPORT SCHEMA command to export the data belonging to the application of the specified schema. Only the owner of the schema may execute the EXPORT SCHEMA command.

Prerequisites

You can use all of the demo data in database DEMODB. Start the Loader and log onto demo database DEMODB as database administrator MONA with the password RED. Use the session mode: loadercli -d demodb -u mona,red.

Activities

The data of the HOTEL schema is to be exported. You can make entries after the keyword CATALOG and/or DATA to select what is to be exported, the database catalog and/or the data belonging to the application.

Exporting the Database Catalog of a Schema

You can export the database catalog information belonging to the application of the schema.

EXPORT SCHEMA hotel

  CATALOG OUTSTREAM 'hotel_ddl.catalog'

The database catalog (CATALOG) is exported in the DDL (default value) format.

See also: Loader, Data Stream

Exporting the Application Data of a Schema

You can export the application data of the schema.

EXPORT SCHEMA hotel

  DATA OUTSTREAM 'hotel_pages.data'

The application data (DATA) is exported in the PAGES format (default value).

EXPORT SCHEMA hotel

  DATA OUTSTREAM 'hotel_records.data' RECORDS

The application data (DATA) is exported in the RECORDS format.

A PAGES export uses a database format (based on a page), and is therefore faster than an export that uses the RECORDS format of the Loader.

You may not change a data file in either case as the binary format is specific to the Loader.

See also: Loader, PAGES, RECORDS

Exporting the Database Catalog and the Application Data of a Schema

You can export the data belonging to the application of the specified schema.

EXPORT SCHEMA hotel

  CATALOG OUTSTREAM 'hotel_ddl.catalog'

  DATA OUTSTREAM 'hotel_pages.data'

Note the sequence of the syntax elements. Always enter the syntax element for exporting the database catalog first, and then the syntax element for exporting the application data.

Excluding Tables from the Export

By specifying a data stream after the keyword CONFIGURATION, you can exclude the application data of tables specified in this data stream. The tables must be identified in the data stream by specifying the schema and table name.

The CITY and HOTEL tables are to be excluded from the export. Create the hotel_table.configuration file with the following contents:

HOTEL,CITY

HOTEL,HOTEL

Specify the following export command in the Loader session mode. Note the sequence of the syntax elements. First, enter the syntax element that excludes the table from the export.

EXPORT SCHEMA hotel

  CONFIGURATION INSTREAM 'hotel_table.configuration'

  CATALOG OUTSTREAM 'hotel_ddl.catalog'

  DATA OUTSTREAM 'hotel_records.data'

The database catalog entries of all tables are always imported, regardless of the restrictions stipulated in hotel_table.configuration.

Additional Log Functions

If you specify a data stream after the keyword PACKAGE, the command entries from the SYSLOADER.TRANSFORMATIONMODEL table are exported to the specified data stream. This is an additional logging option. Always enter the PACKAGE syntax element as the last syntax element.

EXPORT SCHEMA hotel

  CATALOG OUTSTREAM 'hotel_ddl.catalog'

  PACKAGE OUTSTREAM 'hotel_csv.package'

See also: Loader, Additional Log Functions (package_spec)

Complete Syntax of the EXPORT SCHEMA Command

Combining the syntax options can result in correspondingly complex commands. Note the sequence of the syntax elements.

EXPORT SCHEMA hotel

  CONFIGURATION INSTREAM FILE 'hotel_table.configuration' CSV ASCII

  CATALOG OUTSTREAM FILE 'hotel_ddl.catalog' DDL

  DATA OUTSTREAM FILE 'hotel_pages.data' PAGES

  PACKAGE OUSTREAM FILE 'hotel_csv.package' CSV

For a complete syntax description, see EXPORT SCHEMA Command in the Loader documentation.

More Information

Other commands for Exporting

Corresponding Import command IMPORT SCHEMA

Session Mode