How to create a subfile program without using any native io. I was writing a footer before exfmt of the control record. A subfile is nothing but just displaying records in tabular format on a display device. After some research, i recommended to my programming group that we use data queues to add the necessary flexibility to our subfile applications. 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. Rules, examples, techniques, and other cool stuff written by kevin vandever and published by mc press. That is, im sure that its possible to change the value of a variable that holds the rrn.
Basic coding figure 5 rpg program code indicator usage. The source for the display file and the product file used in the example follow the rpg source. The following is an rpg subfile example with a selection option. Once i added the overlay to the footer it worked fine. This class is intended for the rpg iv programmer who needs a better understanding of interactive programming in rpg iv. The ile rpg program to process an expandable subfile has typically the following flow. Use screen design aid to create and maintain display files that contain subfiles. Refer to rpg subfile that loads subfile one page at a time. Data queues are the way to get the features and flexibility youre looking forwithout having to learn uim. In the expandable subfile the subfile size must be at least one greater than the page size. In that situation the records will not be placed at contiguous memory location. You can leave a response, or trackback from your own site. You will learn what is rpg online programming and what are the basic requirements to write rpg online program in iseries and as400 program development environment.
If the last subfile record written to the subfile overflows the subfile, a notify message cpf5043 is returned to your program. The subfile first of all loads the data in subfile buffer. Indicators allow us to manipulate the status of the subfile from the rpg code. Modern rpg for the modern programmer december 2016 sg24540201. You can use them as your reference when creating rpg programs. Adams inputoutput using free format most input and output functions are the same in freeformat rpg iv as in fixed format except for the location of the code within the source line. Traditional fixedformat rpg programmers everywhere are embracing the increased productivity, better readability, and easier program maintenance that comes with the freeformat style of programming in rpg iv. The number of records that actually fit in the subfile depends on the. For a zip file containing all the sources, click here. Then you can start reading kindle books on your smartphone, tablet, or computer no kindle device required.
Youll need to use two keywords in the subfile control format. Aug 05, 2012 interactive programs present data to the user in an organized manner. 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. Essentials of subfile programming and advanced topics in. Get your kindle here, or download a free kindle reading app. Thanks bryce martin programmeranalyst i 5705464777 jerry c. Adams in seeing code that could change the rrn of a subfile record. When d the subfile is cleared, s1rrn should be reset to zero. This is the full source code for the subfile sort program that appeared in the may 2004 issue of the iseries extra newsletter. Fixed format and free format rpg iv are taught in this class with the most modern language enhancements.
I worked for a software development house that wanted the ibm look and feel on. Like most modern programming languages free format rpg use double forward slash to add comments. Pdf document contains command syntax for using podge also included in the binaries file. Intermediate rpg iv programming workshop interactive. He starts with one subfile and then takes that same subfile program almost the entire way. The specified sflpag value is increased to equal the maximum number of records that fit on the display if the number of subfile records to be displayed do not occupy a full display.
A subfile driven by podge can be written in as little as 10 seconds. A load all subfile is one in which we generally specify the subfile size as 9999 in the record format itself. Below are some websites for downloading free pdf books where you can acquire. Best practice for displaying an empty subfile ahh yes. Essentials of subfile programming and advanced topics in rpg. And that is a good thing that helps rpg position itself as a legitimate language with people who didnt break in on rpg iii. 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. The amount of time you want to put into the code should vary based upon the importance of a particular program to the subfles.
D d the s1linenbr fields are initialized differently. The code accompanying this article is available for download here. For this application to have the necessary flexibility, the rpg program and not os400must completely control the subfile. This chapter, subfiles and data queues a perfect combination, looks at how to incorporate all the features in the program development manager pdm into a subfile application. How to create a subfile program without using any native i. This was rather disappointing as rpgle is over 21 years old, free format calculations 14 years old, even free format definitions rpg is in its. Reading books essentials of subfile programming and. Depending on your file, this may not be appropriate for your situation.
For this to happen, the subfile page sflpag and subfile size sflsiz values must be equal. This entry was posted on saturday, may 2nd, 2009 at 6. Redisplaying the first page of a subfile is a major annoyance to users. Online library ibm rpg manual as400 ibm rpg manual as400 thank you for reading ibm rpg manual as400. Your knowledge of subfiles is an important part of your professional development. Pressing the function key affects the subfile containing the cursor. Error message subfile rpgle applications on the iseries. Way to get the same results using rpg and subfile processing. Foundation figure 5 rpg program xrd001rg indicators used. Sfldrop can be specified on the same subfile control record format as the sflfold keyword. A working knowledge of rpg iv programming, or the class introduction to rpg iv programming workshop. This bookboth learning tool and handy reference guideprovides the information you need to learn this powerful way of coding. But the real fun begins when you combine the features.
Arg4 description iseries as400 rpg subfile programming is a selfpaced, multimedia course providing comprehensive, practical training in the design and coding of subfile programs. Reading books essentials of subfile programming and advanced. During d subfile loading, s1rrn is to be incremented by one for each subfile d record written. Also as subfile as400 subfiles basically determines the amount of data that can be stored in subfile. No around the rrn thanks, jeff davis dental network of america booth martin sent by. Going through it you would understand how to manage subfiles and how to hide.
This chapter introduces you to rpg online programming. Cl programs or any iseries ile program can generate interactive subfile displays using podge. If the cursor is not positioned in a subfile, the function key affects the upper subfile. The sflcsrrrn keyword loads a fivedigit hidden field with the relative record number of the subfile record upon which the cursor is located. The parameter value you specify should be large enough to accommodate the maximum number of records you normally have in the subfile. As400 subfiles indicators allow us to as400 subfiles the status of the subfile from the rpg code. This section lists some of the dds source codes as examples, including database files, dspf and subfile. Sfldrop can be specified on the same subfilecontrol record format as the sflfold keyword.
These examples can be used as reference when you design and create your online system. One technique that i have used in the past and is even easier with the size increases of v6 is to use a load all approach but to store the subfile record images in memory. Unlike fixed format where you need to add asterisk at 7th position to add comment, in free format you can add comment at any position. Rules, examples, techniques, and other cool stuff enter your mobile number or email address below and well send you a link to download the free kindle app.
Sorting data is something rpg programs often need to do. With downloadable templates that include both the dds and rpg iv code, this resource provides the techniques and styles. In this case pageup and pagedown is taken care by system. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques. Rpg subfiles pdf this next technique came to me when i was asked to create a subfile applica tion that works. They have the additional responsibility to inform the user about the state of the data being accessed or about an event which took place when manipulating the data.
Mar 01, 2016 like most modern programming languages free format rpg use double forward slash to add comments. When the subfile is built, the records can vary in length depending on which fields are selected, and each output operation places records into successive positions within the subfile. Some basic rpg programming experience is recommended. 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. If the cursor is not located on a subfile record, this field is zero. You can follow any responses to this entry through the rss 2.
International technical support organization who knew you could do that with rpg iv. Free and easy development of web sites with your os400 rpg via cgi. Initially the only the first one page of the subfile is loaded. Write complete subfile code in less than 20 seconds. However, you may define the subfile size to be less than 9999 in the record format and still load all your subfile at a time.
When the subfile is displayed, each record can require a different number of display lines. Inputoutput using free format most input and output functions are the same in freeformat rpg iv as in fixed format except for the location of the code within the source line. 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 programs compile phase. Makes it trivial to add sorting capability to the subfile and doesnt suffer from the where did that record go. If we are writing more records in the subfile buffer than the sflsiz declared and sflsiz, then the sflsiz is extended to accommodate all records till the size of 9999. Subfile page d loading is performed with a doloop at which time s1line is zero. Before i get to the rpg, i need to say a few things about the dds and cl. The next event is to load the record format subfile and an exit. 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. Interactive programs present data to the user in an organized manner. A comprehensive resource that can be used by rpg programmers as they advance from basic subfile usage to more advanced programming, this manual offers concepts, explanations, and practical examples that reflect current trends.
Best practice for displaying an empty subfile rpg400l. Intermediate rpg iv programming workshop interactive programs. 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. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques using freeformat rpg. Get a program to work with ok, enough posturing, lets start by creating a.
Rpg and programming blog archive subfiles in rpgiv and me. As a registered member of, youre entitled to a complimentary copy of chapter 7 of subfiles in rpg iv. One more substantial difference introduced in free format is the use of alternatives to a key list in database i0 for chain, set, and similar operations. Rules, examples, techniques, and other cool stuff ebook. If both keywords are active, the sflfold keyword is used. Rpg free subfile architecture on rpgle development. Someone asked me if i could recommend an example simple subfile program written in rpg free. One more substantial difference introduced in free format is the use of alternatives to a key list in. They have the additional responsibility to inform the user about the state. 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. The term application programming interface api can be applied in many instances. 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.
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