Pathmaker Programming Guide

Creating a DB Requester Application
Pathmaker Application Development Overview
3–18 067868 Tandem Computers Incorporated
Limitations for DB
Requester Applications
If you choose to use a DB requester, you can use the same DDL source code that you
would use with any Pathmaker requester with the following restrictions:
If you identify the entire record as a key field, the Pathmaker application will use
the first group or elementary item in the record as the key.
If you use an OCCURS DEPENDING ON clause, the Pathmaker application will
use the maximum number of occurs items.
Pathmaker DB requesters can handle the maximum Enscribe record length of 4000
bytes.
Using a DB Requester
Application
A DB requester application displays a screen to the end user that consists of a title,
data fields, labels that identify those fields, and function key prompts.
Figure 3-7 illustrates such a screen. (The asterisk (*) and plus sign (+) symbols are
explained in the next few pages.)
Figure 3-7. DB Requester Application Screen
Department 905 Employee Information Page 1/1
================================================================================
+ Employee Name ________________________________________________
* Employee Number __________________
Street ________________________________________________
City __________________ State __ Zip _____
Telephone ___ ___ ____
Job Title _____________________________
Salary Grade _____
Hire Date __ __ __
================================================================================
F3-Help F4-Read First F5-Read Next F6-Read Approximate
F7-Read Exact F8-Read Generic F10-Insert F12-Delete F14-Update
SF13-Undo SF16-Exit
The series of events that occurs when the end user uses a DB requester application is
as follows:
1. The screen is displayed.
2. The end user fills in the necessary information.
3. The end user presses a function key associated with an operation on the database
such as INSERT.