If the cursor is not positioned in a subfile, the function key affects the upper subfile. Subfiles are specified in the dds for a display file to allow you to handle multiple records of the same type on the display. The displayed data is equal to the maximum number of records which can be displayed at a time. In this chapter well create a subfile which will show all the cards from a client given its id. To view or download the pdf version of this document, select dds concepts about 1170 kb. There is a single character field that will be used so that the user can enter a value to, for example, edit, view, delete, etc. How to create basic load all subfile in as400 ibm i. The block of records processed with a list screen is contained in a subfile. How to create basic load all subfile in as400 ibm i youtube. This manual describes how to design, code, enter, compile, test, and run rpg iii programs. With the help of readc opcode we can read only changed records from subfile. Users of the ibm i information center must first read and agree with the terms and conditions for downloading and printing publications.
Redisplaying the first page of a subfile is a major annoyance to users. A subfile is nothing but just displaying records in tabular format on a display device. Laying the foundation for subfile usage requires familiarization with underlying concepts and basic definitions. Sfldrop can be specified on the same subfilecontrol record format as the sflfold keyword. Aug 05, 2012 deject d d recommended indicator usage for display files d d d indicator description d d 01 turns off the overlay when writing msgct d 10 subfile record dspatrhi d 20 subfile foldunfold mode d 21 subfile 1 end and enable rollup key d 22 subfile 2 end and enable rollup key d 23 subfile 3 end and enable rollup key d 24 subfile 4 end and.
Rpg400 report program generator is a structural programming language originated in s36 and s38 systems. The following is an rpg subfile example with a selection option. The control format may have information of its own to display to the user e. 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. Displaying the data from subfile buffer to the display device. With subfiles you can create a display file with lists of items. Ibmi, iseries, as400 tutorial dsplog display history log qhst duration. Refer to rpg subfile that loads subfile one page at a time. This utility can write subfile code for any given sql select statement with little or no user interaction. Your knowledge of subfiles is an important part of your professional development. The subfile first of all loads the data in subfile buffer. This file is a millionplus file of cities of the world it is easily obtained on the internet.
For example, a program reads records from a database file and creates a subfile of output records. Indicators allow us to manipulate the status of the subfile from the rpg code. 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. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques using freeformat rpg.
Kevin vandevers subfiles in rpg iv mc press, 2000 offered easytounderstand explanations of subfile concepts plus a bounty of practical examples, advanced techniques, and other cool stuff never before seen in subfile books. Once i added the overlay to the footer it worked fine. Twenty years ago these are the kind of things you had to know to work on the old as400 systems. Sub files in as400 handling rrn in load all sub file. If the cursor is not located on a subfile record, this field is zero. Interview question and answer as400 subfiles nick litten. After all the changed records have been read, or there are no changed records, the end of file indicator is set on. As400 programming languages and application development tools offers a rich set of tools to create new clientserver applications on the host or workstation. The code accompanying this article is available for download here. Ile concepts in ibm i rpg programming in single video for. The operating system of os400 includes database managers to compilers, editors, etc. Sfldrop can be specified on the same subfile control record format as the sflfold keyword. This is the full source code for the subfile sort program that appeared in the may 2004 issue of the iseries extra newsletter. So, with sflpag10, you can fetch 10 rows at a time going forward.
The list of members that you can see in the pdm is an example of a subfile. A single page subfile is a screen of displayed data loaded at a one time in one go. Sorting data is something rpg programs often need to do. Basic coding figure 5 rpg program code indicator usage. At the time of this writing, the latest version of ibm i is 6. This view explains the basic steps to create your first load all sub file in as400 ibm i.
The programs first task is to load the subfile with one page of records in this case, nine. What is screen design aidsda in as400, strsda command, display file. Introduction to subfiles by kevin vandever the code for this article is available for download. Rpg subfiles pdf this next technique came to me when i was asked to create a subfile applica tion that works. Online library ibm rpg manual as400 ibm rpg manual as400 thank you for reading ibm rpg manual as400. Sep 24, 2017 this video explains the basic ile concepts in rpg programming in ibm i. It only reads changed subfile records, which will be the ones where the user has entered a value in the option field, as that is the only field in the subfile that can receive input. To use a subfile for a display device file in an rpg program, you must specify the sfile keyword on a file description specification for the workstn file. Essentials of subfile programming and advanced topics in rpg. Sfl, sflctl, sfldsp, sflsiz, sflpag are the mandatory key words. Subfile record format a subfile s process can be divided mainly into 3 parts. After clearing the subfile buffer, records equal to the size of sflpag is written. It also tells it to find the fields and attributes of the fields using the database definition of the cust file.
Rpg400 tutorial rpg400 report program generator is a. But the real fun begins when you combine the features. Since 2008 20 years later, we know the as400 as the ibm i. Tivoli management framework users guide, tivoli management framework reference manual, and tivoli management framework release notes provide detailed conceptual and procedural information about planning, configuring, maintaining, and managing tivoli installations from the tivoli desktop of the command line. Indicators are checked at the time the subfile is displayed.
Such a statement tells the computer that you are ready to use the file. Aug 21, 2003 this book begins with easytounderstand explanations of subfile concepts then goes on to offer a bounty of practical examples, advanced techniques, and other cool stuff never before seen in subfile books. Lansa as400 tutorial filetype pdf introduction to as iseries free download as pdf file. Best practice for displaying an empty subfile rpg400l. Sfldspctl, sflclr, sflinz, sflend are the optional key words used in subfile. July 1992 complete understanding of any subject begins with a starting point to build upon.
In other words in a single page subfile all loaded records are displayed at. It takes less than 20 seconds to write complete subfile code. As400 is a computational platform developed by ibm in 1988. This video explains the basic ile concepts in rpg programming in ibm i. For a zip file containing all the sources, click here. Single page subfiles nick litten is ibmi, as400 iseries. The subfile record is very simple with just four fields. The dds for the cities file used in this application note. This tutorial strives to teach network programming using sockets to as400 or. Check video at topbottom of this page for more details. Cobol400 subfiles the screen will come but only the footer will display and it will be in a it will end up abnormally. The ibm as400 a technical introduction by tom van looy january 2009 this paper was written for the as400s 20th anniversary.
In this case sub file size sflsiz must be equal to subfile page sflpag. Write complete subfile code in less than 20 seconds. 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. The ibm i information center offers portable document format pdf files for viewing or printing the following topics. Pdf using cpysplf and create zip file in as400 duration. Essentials of subfile programming and advanced topics in rpg iv teaches you to design and program subfiles, offering stepbystep instructions and realworld programming exercises that build from chapter to chapter.
Youll set the sflrows variable to be the number of subfile rows you have on a single page. Sep 10, 2017 this view explains the basic steps to create your first load all sub file in as400 ibm i. This video explains how to handle the cursor position using rrn in load all sub file type. In other words in a single page subfile all loaded records are displayed at a time.
May 09, 2016 the subfile record is very simple with just four fields. This article focuses on the typical logic flow of a subfile program, along with the coding of both the display file and the rpg400 program to control. Every time the record is written in the buffer, buffer is cleared before writing. The f specification tells the as400 to set up a way to read the cust file. 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. Whatissubfilea subfile is a group of records that are read from or written to a display device. It is also referred as system i5 and the term as400 is popular and widely used. And set the previoussflrows to be twice that number, but make it negative.
I found these on an old dusty corner of my homeserver. The sflcsrrrn keyword loads a fivedigit hidden field with the relative record number of the subfile record upon which the cursor is located. Thanks bryce martin programmeranalyst i 5705464777 jerry c. Rpgle write data to ifs using c apis open close write. Before using this information and the product it supports, be sure to read the general information under notices on page xi. Enjoy the trip down memory lane or to use old rpg lingo as400nerd cabeq 1 start subfiles what is a subfile.
Subfiles with subfiles you can create a display file with lists of items. Depending on your file, this may not be appropriate for your situation. Maybe you have knowledge that, people have search hundreds times for their favorite books like this ibm rpg manual as400, but end up in harmful downloads. Hi stiju, the input subfile is coded same as normal subfile you may design your subfile with input capable fields may be size greater than page and compile and no extra key words required other than as you normally design for normal subfile in your program as you load for a normal.
Jun 18, 2016 this utility can write subfile code for any given sql select statement with little or no user interaction. Back to basics introduction to subfiles back to basics. On their own, each feature is simple to code in an. Sub files in as400 handling rrn in load all sub file youtube. To display the subfile contents to the user, you write the records to be displayed into the subfile records, set the proper indicators and write the control record format to display them to the user.
A subfile is a display file where you can place a listing of values and process changes on the list. Application development toolset plus for as400 offers the easiest, most productive, and most costeffective tools for creating client and server applications. A subfile is a group of records that is read from or written to a displaydevice file. The source for the display file and the product file used in the example follow the rpg source. 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. Best practice for displaying an empty subfile ahh yes.
Below downloadable pdf from scott explains the concept even further and it is worth reading it. Posts about iseries subfile programming written by ben. It is a comprehensive resource you will use over and over as you advance from basic subfile usage to gurulike mastery of subfile programming. Should be familiar with the appropriate authority to the cl commands and objects and understanding of ile will be useful. In most other languages, you would need a statement to open the file. A subfile can be specified in the dds for a display file to allow a program to handle multiple records of the same type on a screen. 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. To learn this tutorial one must be aware of how to use applicable ibm i menus and displays, or control language cl commands. If both keywords are active, the sflfold keyword is used. When rpg400 was introduced in as400 it was the third version of the same also known as rpgiii. I was writing a footer before exfmt of the control record. As a prelude to the specific code used to implement a subfile. This book begins with easytounderstand explanations of subfile concepts then goes on to offer a bounty of practical examples, advanced techniques, and other cool stuff never before seen in subfile books.
167 134 477 713 1084 1050 1063 1347 1478 32 1067 633 486 667 308 320 190 816 363 686 560 1211 261 277 167 1047 251 1415 809