About Exports

When an Export is configured to run as part of a job, the export may be enabled or disabled (allowing you to retain a Job definition but to enable or disable the export of data temporarily), and you can specify how you want to write data to the target Data Store, from the following options:

Delete current data and insert (default)

EDQ deletes all the current data in the target table or file and inserts the in-scope data in the export. For example, if it is writing to an external database it will truncate the table and insert the data, or if it is writing to a file it will recreate the file.

Append to current data

EDQ does not delete any data from the target table or file, but adds the in-scope data in the export. When appending to a UTF-16 file, use the UTF-16LE or UTF-16-BE character set to prevent a byte order marker from being written at the start of the new data.

Replace records using primary key

EDQ deletes any records in the target table that also exist in the in-scope data for the export (determined by matching primary keys) and then inserts the in-scope data.

Note:

• When an Export is run as a standalone task in Director (by right-clicking on the Export and selecting Run), it always runs in Delete current data and insert mode.

• Delete current data and insert and Replace records using primary key modes perform Delete then Insert operations, not Update. It is possible that referential integrity rules in the target database will prevent the deletion of the records, therefore causing the Export task to fail. Therefore, in order to perform an Update operation instead, Oracle recommends the use of a dedicated data integration product, such as Oracle Data Integrator.