Creates a writable external web table, campaign_out, that pipes output data received by the segments to an executable script, to_adreport_etl.sh:

    1. =# CREATE WRITABLE EXTERNAL WEB TABLE campaign_out
    2. (LIKE campaign)
    3. EXECUTE '/var/unload_scripts/to_adreport_etl.sh'
    4. FORMAT 'TEXT' (DELIMITER '|');

    Parent topic: Examples for Creating External Tables