public class Publish extends Object
Publish is invoked after the External Table has been defined, and writes the
configuration information into each of the
specified in the External Table definition. The External Table definition
must contain a
PREPROCESSOR clause which refers to the
Preproc program. When a
SELECT is invoked on
the relevant External Table, the preprocessor is run and the configuration
read from the location file (the preprocessor is invoked separately for each
location file in the External Table). The preprocessor connects to the NoSQL
Database, reads records according to the restrictions specified in the
configuration, formats them using either default formatting or a
user-supplied Binding class, and writes the records to stdout where the
Oracle server reads them and imports them into the External Table.
The Publish utility may be re-run anytime the relevant NoSQL Database connection or query information changes.
public static void main(String args)
: Specifies the pathname of the configuration file containing information about the Oracle Database instance, the External Table, the Oracle NoSQL Database, the (optional) Formatter class, and any query restrictions. -publish: writes the config data to the External Table Location file(s). -noexecute: verify connectivity to the Oracle Database and Oracle NoSQL Database, but do not write configuration information to the Location file(s). -verbose: Writes debugging output to the console.
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