The following subfile example uses dds from t1520ddg and t1520ddh to display a list of names and telephone numbers. If its just a simple single field array youre sorting in order to use the much faster binary search possible with %lookup, for example, then sorta works well and is simple. Brmsbased saverestore software encryption and dasdbased asp encryption. What is the maximum number of subfiles that can specified in a display file. I hope you dont mind another question about the old stuff. In display routine, afer writing the subfile ctl part, when it comes to read there it will not at all display the screen, just it will go to next statement. Example sort subfile your partner in iseries education. David this is a good technique to know, david, and its not hard to do.
Lets start with a simple subfile of 10 records per page. After clearing the subfile buffer, records equal to the size of sflpag is written. Two new lowend ibm z15 mainframes and security software aim to help users better prevent internal attacks, as well. Subfiles sample program in rpgle,cobol subfile program with read, write, update and delete fuctions. With pageatatime subfiles, you have to clear and build one new page of subfile records every time the user pages and uses a.
I do this because not all of you readers are seasoned veterans. Whats the difference between the three types of subfiles as in the dds. Expandable subfiles in rpgle an expandable subfile is one in which ideally one page of records are loaded at a time. View notes 45633633 as400 subfileprogrammingpartiibasiccoding from computers 101 at iit kanpur. The platform was first introduced as the as400 application system400 in june 1988 and later renamed to the eserver iseries in 2000. Intermediate rpg iv programming workshop interactive. A subfile driven by podge can be written in as little as 10 seconds. The values of each must match value of each sflpag keyword.
It can be an editable tabular format due to which it can be used in data entry screen, inquiry static screen or combination of both i. Indicators allow us to manipulate the status of the subfile from the rpg code. How do i program for the dup key in a data entry subfile. Screen for sample application work with customers date 61692 time 21. Establish values for all snpage variables for all subfiles used in the program. How do i determine which subfile record the user clicked on if they click on one of the nonactive subfiles. Interview question and answer as400 things you should know. You can use subfiles to read or write a number of records to and from a display in one operation. Subsequent pages are added to the subfile as per the user demand. Students will create, debug and maintain numerous interactive rpg iv programs of increasing complexity.
As part of ibms rebranding initiative in 2006, it was again renamed to system i. Cl this program illustrates how to write a cl program that adds or subtracts a given number of days for the current system date or any ccyymmdd year. Cobol iseries as400 code examples iseries as400 sample cobol programs several sample iseries as400 cobol programs. Should mqt update automatically as soon as tables involved in selectstatement gets updated. Each subfile holds up to 100 records all loaded at once so its possible and likely the user has scrolled the subfiles before clicking on them. As400 iseries and others iprodeveloper magazine as400 security as400 services as400 security software as400 training, system i and iseries security and iseries audit services and security software ibm i manifest americas welcome iseries as400 programming tips, support, sql, rpg, subfiles, consultants, books, software, atlanta. Every time the record is written in the buffer, buffer is cleared before writing. The code accompanying this article is available for download here. The list of members that you can see in the pdm is an example of a subfile.
Toggle navigation as400 tutorial as400 chapters as400 faq as400 ebooks as400 course contact. Interview question and answer operating system os400. Darrell fitzhugh iseries rpgile software engineer amr. The subfile first of all loads the data in subfile buffer. Basic coding figure 5 rpg program code indicator usage. Rpg subfiles pdf this next technique came to me when i was asked to create a subfile applica tion that works. Subfiles with subfiles you can create a display file with lists of items. Users of the ibm i information center must first read and agree with the terms and conditions for downloading and printing publications if you are looking for a specific pdf that is not listed in the table, see the list of additional reference manuals. Visit the itknowledge exchange and get answers to your developing questions fast. Tivoli software distribution users guide, tivoli software distribution reference manual, and tivoli software distribution release notes provide concepts and procedures necessary to effectively install and use tivoli software distribution from the tivoli desktop and from the command line interface to distribute software over networks. If you are a professional member of iseries network, you can read an article about using keyed data queues to sort subfiles in rpg in the november 2004 edition of the iseries news magazine. Update the subfile record using readc the difference between chaining the subfile with rrn is that you will read all the records, providing you increment the rrn readc will only read the changed subfile unless you use sflnxtchg.
Basic coding figure 1 screen for sample application figure 1. Ibm as400 manuals manuals and user guides for ibm as400. For a zip file containing all the sources, click here. This is the full source code for the subfile sort program that appeared in the may 2004 issue of the iseries extra newsletter. A subfile is a display file where you can place a listing of values and process changes on the list. Darrell fitzhugh iseries software engineer at insight global phoenix, arizona area 73 connections. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. To take advantage of these control fields for new subfile programming, in addition to other fields related to the programming logicpattern established to use these fields, the following copy member is created to be copied into all subfile programs so that they are included during the program. In this case sub file size sflsiz must be equal to subfile page sflpag.
The 400 school live training for ibm i iseries and as400. Back to basics introduction to subfiles back to basics. Cobol400 subfiles the screen will come but only the footer will display and it will be in a it will end up abnormally. After a few minutes of googling most of the examples i found were in rpgiii, a few were in fixed format rpgle, and a couple had free format calculations. Ibm i software developer, digital dad, as400 anarchist, rpg. With subfiles in freeformat rpg, you will learn how to.
I just had a brief look at this code and i think you are not using the write subfile command. The source for the display file and the product file used in the example follow the rpg source. Robert murphy highland park, illinois professional. If we are writing more records in the subfile buffer than the sflsiz declared and sflsiz sflsiz is extended to accommodate all records till the size of 9999. Over 20 years experience with as400 systems programming in rpg iv, cl400, sql and subfiles. In the expandable subfile the subfile size must be at least one greater than the page size. Mastering subfiles is often the defining moment in an rpg programmers career. Posts about iseries subfile programming written by ben. Introduction to subfiles by kevin vandever the code for this article is available for download. This newsletter normally covers cuttingedge technology, but every once in a while, either by request or by choice, i decide to write a back to basics article. At the 400 school, we have been training it professionals for over 20 years in ibm i, iseries and as400 technologies including computer operations, system administration, system security, and programming in rpg, cobol, and control language. Whats the difference between the three types of subfiles.
Way to get the same results using rpg and subfile processing. Sorting data is something rpg programs often need to do. The rpgfree template rpgle applications on the iseries. System i iseries i5 as400 programming tips, support. Hi gary, i have a screen with 3 subfiles but not in windows. This workshop focuses on the technology and programming needed to write and maintain interactive display screen programs in the ile rpg iv language used on the ibm i iseries, as400. Using subfiles in ibmile tutorial 17 april 2020 learn.
I worked for a software development house that wanted the ibm look and feel on all of its screens. The net result is that subfiles make presenting columns of information easier with their own syntax and structure that you must understand to use subfiles. Example subfile program using modern rpg someone asked me if i could recommend an example simple subfile program written in rpgfree. Podge uses ibm iseries db2 sql and a few basic parameters to generate dynamic subfiles. Categories software mainframe ibm as400 ibm as400 allother. A subfile is nothing but just displaying records in tabular format on a display device. This book gives you the concepts, styles, and advanced techniques using freeformat rpg that will enable you to become a subfile master in your own right. If i move the cursor to one of this subfiles, and then press pageup or pagedown, the subfile under the cursor scrolls. The thinking was that users familiar with the as400 would be. Sfl keyword example in as400, use of sfl when creating a subfile.
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