Arg4 description iseries as400 rpg subfile programming is a selfpaced, multimedia course providing comprehensive, practical training in the design and coding of subfile programs. Pdf document contains command syntax for using podge also included in the. 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. Essentials of subfile programming and advanced topics in rpg essentials of subfile programming and advanced topics in rpg iv rpg ii, rpg iii, and rpg 400 with business applications 2nd edition rpg ii, rpg iii and rpg 400 the shellycashman series rpg programming success in a day. Subfiles programming latest final file format reserved. Error message subfile rpgle applications on the iseries. In this chapter, you will learn step by step how to create a subfile record using sda. Some basic rpg programming experience is recommended. Rules, examples, techniques, and other cool stuff written by kevin vandever and published by mc press. Sorting data is something rpg programs often need to do.
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. Someone asked me if i could recommend an example simple subfile program written in rpg free. 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. A subfile is nothing but just displaying records in tabular format on a display device. Essentials of subfile programming teaches you to design and program subfiles, offering stepbystep instructions and realworld programming exercises that build from chapter to chapter. Displaying the data from subfile buffer to the display device. You can follow any responses to this entry through the rss 2. Subfile relative record number in rpgle solutions experts. Dec 05, 2010 controlling subfiles there are several areas of programming which make up a successful subfile program. Interactive programs present data to the user in an organized manner. You can leave a response, or trackback from your own site. Controlling subfiles there are several areas of programming which make up a successful subfile program. The number of records that actually fit in the subfile depends on the.
This keyword is used with the option indicator to control the display. I worked for a software development house that wanted the ibm look and feel on. A subfile is one type of record format allowed in a display file. This view explains the basic steps to create your first load all sub file in as400 ibm i. Beginners guide to fast, easy and efficient learning of rpg. This chapter introduces you to rpg online programming. This chapter teaches you how to write an online rpg program using subfile record. As neil points out, fields named or constant in the control record all have to appear either above or below the subfile area. Technically, each record that has the modify data tag set on is returned with the readc operation. Essentials of subfile programming and advanced topics in. Reads postoptimal analyses, parametric programming and related topics free books. On their own, each feature is simple to code in an rpg subfile program.
One more substantial difference introduced in free format is the use of alternatives to a key list in. Your knowledge of subfiles is an important part of your professional development. Chain, readc, update, or write operation codes can be used for subfile record format to transfer data between the program and the subfile. But the real fun begins when you combine the features. Cobol subfile example loading one page at a time ibm. This entry was posted on saturday, may 2nd, 2009 at 6. You can use them as your reference when creating rpg programs. If the last subfile record written to the subfile fits exactly into the subfile, a status message cpf5003 is returned to your program. 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 cursor is not positioned in a subfile, the function key affects the upper subfile. Rpg subfiles pdf this next technique came to me when i was asked to create a subfile applica tion that works. Essentials of subfile programming and advanced topics in rpg. As400 subfiles are equivalent to windows list boxes. The modify data tag is a 5250 datastream flag that is switched on when the workstation user types data into a field that is displayed on the workstation.
Best practice for displaying an empty subfile ahh yes. That is, im sure that its possible to change the value of a variable that holds the rrn. This bookboth learning tool and handy reference guideprovides the information you need to learn this powerful way of coding. 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. Subfile definition of subfile by the free dictionary. There are ddsspecifications which define certain keywords to govern page initialization and positioning. O ile rpg for as400 programmers guide version 4 sc09250702. Subfiles programming latest final free download as powerpoint presentation. Levinsonaccess books essentials of subfile programming and advanced topics in rpg full access. Sfldrop can be specified on the same subfile control record format as the sflfold keyword. You will also learn how to test subfile record using sda. 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.
For each record added to the subfile, field rrn is incremented by 1. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques using freeformat rpg. If there are no records to display on the subfile, we simply turn this indicator off so that the subfile is not displayed. The rpg programs workstn fspecs define the subfile s relative record number field. In the expandable subfile the subfile size must be at least one greater than the page size. Youll need to use two keywords in the subfile control format. Similar to labeling folders in a traditional filing cabinet, each artifact needs to have a specific title, description, and purpose and needs to be uploaded to a specific file or subfile for easy access. The reason that you are having the problem is because the program is using rrn field as relative record of subfile sfileformat. Use screen design aid to create and maintain display files that contain subfiles.
To be a real pro, you need to handle them properly. Reading books essentials of subfile programming and advanced. The ile rpg program to process an expandable subfile has typically the following flow. 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. Indicators allow us to manipulate the status of the subfile from the rpg code. 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. When you read the subfile record, the system change the rrn to t. Not role playing games, but the rpg programming language and the craft of programming. Subfile processing is an integral part of rpgiv data entry and data display. Once i added the overlay to the footer it worked fine. 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 rpg programs workstn fspecs define the subfiles relative record number field.
I could have used the same indication to display the subfile control as i did for sfl01, but i decided that this subfile deserves its own indicators the last record format of the display file is the footer section, which i use to display the available function keys. Reading books essentials of subfile programming and. The source for the display file and the product file used in the example follow the rpg source. For a zip file containing all the sources, click here. Basic coding figure 5 rpg program code indicator usage. The readc operation line 4 reads each record of the subfile that has been modified. 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 sflcsrrrn keyword loads a fivedigit hidden field with the relative record number of the subfile record upon which the cursor is located.
Best practice for displaying an empty subfile rpg400l. Rpg and programming blog archive subfiles in rpgiv and me. The subfile first of all loads the data in subfile buffer. Then you can start reading kindle books on your smartphone, tablet, or computer no kindle device required. Rpg400 programming on the as400 download as 400 subfile programming part ii. They have the additional responsibility to inform the user about the state. Traditionally, three different methods are used to load subfiles. 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. 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.
This is the full source code for the subfile sort program that appeared in the may 2004 issue of the iseries extra newsletter. Initially the only the first one page of the subfile is loaded. August 1992 we begin examining the coding of the display file and hll program along with the logic and. When the subfile control record is written to the workstation file, the subfile detail records also are written. If the cursor is not located on a subfile record, this field is zero. There are any number of ways to build and maintain them. Com sql embedded and variables for beginners and not. Redisplaying the first page of a subfile is a major annoyance to users.
Managers and business analysts need to understand how to use this powerful technique. Using chain to access a subfile record in free format. This section lists some of the dds source codes as examples, including database files, dspf and subfile. The question should be, can you display a subfile at the same time as another record format. The program tosystem field must be defined with a length of 5 and data type s. July 1992 complete understanding of any subject begins with a starting point to build upon. Basic coding written by mc press contributing author friday, 31 july 1992 18. I remember there was not only programming, but thinks like machine learning and such, and the books were all free i think. How to create basic load all subfile in as400 ibm i. The answer is yes, but there are some things to consider. Way to get the same results using rpg and subfile processing. Adams subfile parameter can be specified in 2 ways. Find answers to using chain to access a subfile record in free format.
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. I was writing a footer before exfmt of the control record. The primary task of the rpg program is to load the subfile fill it with specific data, some portion of which will be displayed on the screen under the control of the subfile control record. Getting comfortable with subfile programming is essential for designing user friendly interfaces.
Unlike database files, subfiles can store data in hidden fieldsfields that will not be displayed but can be used when you process the file. 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. Online rpg400 programming on the as400 read download pdf. These examples can be used as reference when you design and create your online system. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques. Example loading subfile one page at a tim character in rpgle. In the program logic, there are certain principles that govern the type of logic required. When the subfile is displayed, each record can require a different number of display lines. The number of records that actually fit in the subfile depends on the fields selected for each record written to the subfile.
U sfldsp this keyword is used at record level to display the subfile. Subfile relative record number, page size and page. Rrn is linked to the subfile in the rpg program with a continuation fspec. Foundation figure 1 state code subfile lookup figure 1. Readc read next changed subfile record the modern rpg iv. This subfile, like the first, is a load all subfile of 30 rows, and displays six at a time. I remember there was some torrent, 15 gb in size, and it had book for almost every popular language and such. Thanks bryce martin programmeranalyst i 5705464777 jerry c. Pfields can be used for the size of the subfile when using sflend with the scrbar parameter. Laying the foundation for subfile usage requires familiarization with underlying concepts and basic definitions.
192 33 345 578 800 998 96 57 1289 1527 443 1231 65 154 1015 1355 372 782 993 1590 509 750 18 935 525 1466 806 298 54 864 1490 698 587 1184 1499