Micro Focus Visual COBOL 2.3 Update 2 for Eclipse (UNIX) > Programming > Data Access > Database Connectors for Visual COBOL > Database Connectors User's Guide > Working with COBOL > Examples of Preparing and Compiling a Program > Example 3 - Using Additional XFD Directives

Example 3 - Using Additional XFD Directives

Restriction: This topic applies only when a Database Connectors license has been installed via the Micro Focus License Management System.

This example (order3.cbl) demonstrates how to streamline the code to introduce the following changes:

Apply the USE GROUP XFD directive to the notes to group them, which improves execution speed and clarity. Accessing each note line individually from the database side is not required.
Rename the notes field for convenience.
Apply the USE GROUP and DATE XFD directives to the date, to give it all the properties of a date on the database side.

fd p-o-file.
$xfd when p-o-record-type = "h"
 01  p-o-record.
     03  p-o-division-number                      pic 9(3).
     03  p-o-record-type                          pic x.
         88  header-record                        value "h".
         88  detail-record                        value "d".
     03  p-o-number                               pic 9(10).
     03  p-o-number-detail redefines p-o-number.
         05  picking-ticket-number                pic 9(6).
         05  shipping-region                      pic 9(2).
         05  p-o-customer-type                    pic 9(2).
         05  p-o-customer-breakdown redefines 
               p-o-customer-type.
             07  customer-category                pic x.
                 88  p-o-customer-retail          value "r".
                 88  p-o-customer-whlsale         value "w".
             07  customer-pay-format              pic x.
                 88  is-net-30                    value "3".
                 88  is-net-10                    value "1".
$xfd use group, date
     03  p-o-date.
         05  p-o-yy                               pic 9(2).
         05  p-o-mm                               pic 9(2).
         05  p-o-dd                               pic 9(2).
$xfd when p-o-record-type = "d"
 01  p-o-detail-record.
     03  p-o-dept-number                          pic 9(3).
     03  p-o-record-type                          pic x.
     03  detail-p-o-number                        pic 9(10).
     03  p-o-shipping-info.
         05  p-o-quantity-to-ship                 pic s9(4) comp.
         05  p-o-total-quantity                   pic s9(4) comp.
$xfd use group, name = notes
     03  p-o-notes.
         05  notes-line occurs 3 times            pic x(40).

Note: p-o-record-type is entered only once into the table. The detail-p-o-number field is not part of the table, because the key overlays this area.

The following table is built in the database:

Column Name	Type
p_o_division_number	number(3)
p_o_record_type	char(1)
p_o_number	number(10)
p_o_date	date
p_o_dept_number	number(3)
p_o_quantity_to_ship	number(4)
p_o_total_quantity	number(4)
notes	char(120)