Displaying Descendant Segments: The CHILD, PARENT, and JUMP Commands

Syntax: How to Display a Child Segment

To display instances in a child segment relating to the current instance, enter

CHIld

or press PF5 or PF17. If the segment on the screen when you enter the command has only one child segment, FSCAN shows the child segment. If the segment on the screen has more than one child segment, FSCAN displays a menu of child segments. Select a segment by entering its number. (Note: The menu does not display segments restricted to you as a result of DBA restrictions.)

If you already know the number of the segment on the menu, you can skip the menu by entering

CHIld n

where:

n: is the number of the segment on the menu.

You can display the child instances of any instance on the screen by typing C in the prefix area next to the instance. You can skip the menu by typing C followed by the number of the segment on the menu.

Example: Displaying a Child Segment

For example, suppose you are displaying the root segment of the EMPLOYEE database and you want to see the monthly pay of Mary Smith. Monthly pay is contained in the segment SALINFO, a child of the root segment. First, make Mary Smith's instance the current instance. Then, enter the command:

CHILD

The following menu appears:

FSCAN FILE EMPLOYEEFOCUS A1               CHANGES :0
 
 
 Please enter the number of the child segment you want
 
 
 1)FUNDTRAN            2)PAYINFO
 3)ADDRESS             4)SALINFO
 
 
 
 
 
 
 
 =>
    Enter the number of the child you want
    Enter 0 to stay at parent.

Enter the number 4. The following screen appears:

 FSCAN FILE EMPLOYEEFOCUS A1            CHANGES :0
 
 EMP_ID : 112847612
 
          PAY_DATE      GROSS
          --------      -----
 
 ==       820831        1100.00
 ==       820730        1100.00
 ==       820630        1100.00
 ==       820528        1100.00
 ==       820430        1100.00
 ==       820331        1100.00
 ==       820226        1100.00
 ==       820129        1100.00
 
--------------------------------INPUT----------------------------------
 ==
 ==>

Note that the header displays the key field value of the parent instance. Since EMP_ID is the key field of the root segment, the header displays Mary Smith's employee ID.

Also, you could have gone directly from the EMPLOYEE root segment to the monthly pay segment by doing one of the following:

Typing CHILD 4 on the command line.
Typing C4 in the prefix area.

Syntax: How to Display the Parent Segment

To return to the parent segment, enter

Parent

or press PF4 or PF16. The current instance in the parent is the same as before you entered the CHILD command or C prefix area command.

Syntax: How to Display the First Child of the Next Parent Instance

To move to the first child of the next parent instance, enter

JUMP

or press PF12 or PF24 while FSCAN is displaying a child segment.

Example: Displaying the First Child of the Next Parent Instance

For example, if you enter JUMP while the PAYINFO segment is being displayed for a particular employee, the PAYINFO segment for the next employee in the EMP_INFO segment is displayed. JUMP may be issued anywhere.