Subfile is a group of records of same record format and can be read from or write to the display in a single operation. How to create a subfile program without using any native i. Mar 28, 2001 this book is the perfect book for you if you are writing sql on the as400 or using a odbcjdbc to submit sql to the as400. Errsfl err or subfile keywor d for display files 1 18 fldcsrprg cursor pr ogr ession field keywor d for display files. The subfile first of all loads the data in subfile buffer. Log and monitor database activity including inserts, updates or deletes. Example rpg program using a physical, display, and printer file. The compilation of embedded sql is different than the normal. If your trying to run an sql statement on the as400, but are getting errors because one of your column names is an db2400 sql reserved word, try the following. Let me show you how sql can enhance your subfile inquiries. Originally, sql was primarily a query language and we used other techniques to modify our data, most often some form of indexed sequential access method isam like the one built into the ibm i now known as. The first problem to overcome is that if i code two subfiles, one to occupy the left side of the screen and the other the right, whichever subfiles control record i write last will overlay the other.
Interview question and answer as400 subfiles nick litten. After clearing the subfile buffer, records equal to the size of sflpag is. Users of the ibm i information center must first read and agree with the terms and conditions for downloading and printing publications. However, rather than specify the window attributes with this keyword, ive specified that display management should reference format window1 making rcdctl a window reference format when displaying. A subfile is nothing but just displaying records in tabular format on a display device. Write complete subfile code in less than 20 seconds. Subfile in sql hi all, i was searching the archives for single page subfile ideas and ran across an old thread about using sql in subfiles. Nov 27, 2016 perhaps because a subfile represents a set of data and that is where sql shines. Sqlrpgle select statement for db2 in iseries as400.
This close cooperation lets you easily take advantage of the capabilities of sql in your everyday rpg programs. Perhaps because a subfile represents a set of data and that is where sql shines. The row is the horizontal part containing one or more columns. As a registered member of, youre entitled to a complimentary copy of chapter 7 of subfiles in rpg iv.
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. The only down side with these being a view and table function is. Commitment control commit specifies whether sql statements are run under commitment control. If sql statement ends in error, rpg program does not stop. 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. The subfile record is very simple with just four fields. Creating a screen at a time subfile program using sql for the file io. 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.
Embedded sql and dynamic sorting subfiles sql programming. 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. Aug 21, 2003 for each topic, the book offers concepts, explanations, and practical examples you can use as templates for further development. The operating system for as400 also got renamed with the rebranding. In addition, it shows both the common and uncommon uses. So, with sflpag10, you can fetch 10 rows at a time going forward. The control format may have information of its own to display to the user e. Sql query of multimember file on as400 stack overflow. 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. When the entire subfile has been written, the program sends the entire subfile to the display device in one write operation. In this the sql statement is hard coded in the program. I was not able to find any examples of anyone actually implementing any of the techniques suggested unless i missed some threads. When the subfile is displayed on an output operation to the subfile control record, all records in the subfile are displayed with the same value.
Basic coding figure 2 display file xrd002df a dspsiz24 80 ds3 a refcustmst a print a ca0303 a ca1212 a r detail sfl a select 1a i 12 6 a csnum r o 12 11 a csname r o 12 23 a cscrlt r o 12 56edtcde1 a r header sflctldetail a overlay a sflsiz0050 a sflpag0010 a 31 sfldsp a 32 sfldspctl a 33 sflclr a 34 sflend a 1 31work with customers a. Overlapping conditioned subfile fields hi andy, iirc, if the sflpag sflsiz, you can actually use field conditioning indicators, e. The first problem to overcome is that if i code two subfiles, one to occupy the left side of the screen and the other the right, whichever subfile s control record i write last will overlay the other. Basic coding figure 2 display file xrd002df a dspsiz24 80 ds3 a refcustmst a print a ca0303 a ca1212 a r detail sfl a select 1a i 12 6 a csnum r o 12 11 a csname r o 12 23 a cscrlt r o 12 56edtcde1 a r header sflctldetail a overlay a sflsiz0050 a sflpag0010 a 31 sfldsp a 32 sfldspctl a 33 sflclr a 34 sflend a 1 31work. In this method all objects are referenced by one virtual address which is translated in to. And set the previoussflrows to be twice that number, but make it negative. Combining embedded sql and subfile programming allows you to take your applications to new heights.
Trying to use my procedure from a pgm complied with crtbndrpg bob cozzi 6. Jun 05, 2019 using data areas with sql the latest technology refresh, ibm i 7. It contains all the littleused gems that make your job easier. Rules, examples, techniques, and other cool stuff written by kevin vandever and published by mc press. All objects are stored on as400 in a single level storage.
International technical support organization who knew you could do that with rpg iv. When i was asked about a screen with two subfiles, sidebyside, i was intrigued how to do it. The code accompanying this article is available for download here. Subfile record format, subfile control record format, relative record number, subfile record number, associated subfile keywords. A subfile is a group of records that is read from or written to a displaydevice file. Youll set the sflrows variable to be the number of subfile rows you have on a single page. I only ever use totally free format rpg these days line 2. These templates are fully functioning programs that include both dds and rpg iv code from basic singlepage display subfiles to powerful techniques like recursion, data queues, and embedded sql.
Screen at a time subfile using sql in my last post i gave an example of how to write a screen at a time subfile in rpg. When i finished writing that post i thought to myself how would it be possible to do the same using sql. Sorting data is something rpg programs often need to do. These as400 books convers as400 system operations as well as excel to as400 data migration with examples. U single pagenonelastic subfile in this case sub file size sflsiz must be equal to subfile page sflpag. Now, this popular manual has been updated from beginning to end to teach subfile concepts and programming techniques using freeformat rpg. It is multiuser, multitasking and very secure system and hence is used for the industry which requires sensitive data to be stored and processed simultaneously. Sql audit tracks and monitors modifications made to any ibm iseries as400 database using sql. This is the rpg programming on the as400 iseries rpg400l mailing list to post a message email.
To compile an sqlrpgle source member, use the create sql ile rpg object crtsqlrpgi command. The column is the vertical part containing one or more rows of data of one data type. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. Advanced subfile topics figure 1 subfile display with field selection figure 1. The as400 application system400 was first introduced by ibm on june 21st, 1988 and later renamed to as eserver iseries in 2000, then in 2006, it was renamed as system i. For a zip file containing all the sources, click here. For example, a program reads records from a database file and creates a subfile of output records. Modern rpg for the modern programmer december 2016 sg24540201. If you are using pdm, option 14 will create a bound program, and.
A table in sql is a keyed or nonkeyed physical file. The embedded sql support for rpg allows me to write sql statements that interact directly and seamlessly with host variables, something i wish could do in my java programming. A subfile with paging by ibm i and highlevel language. Mar 16, 2006 subfile in sql hi all, i was searching the archives for single page subfile ideas and ran across an old thread about using sql in subfiles. This is the 2nd video about wrtsfl utility which can write subfile code for any given sql select statement.
As i have defined the path variable to be variable length, see line 4, it is only as long as the length of the data within it. You can create a table using the create table statement. To view or download the pdf version of this document, select dds concepts about 1170 kb. The dftactgrp is a giveaway that the program uses a procedure line 3. Latest ibm as400 interview questions and answers for freshers and experienced pdf free download ibm as400 interview questions and answers list 1. Every time the record is written in the buffer, buffer is cleared before writing. In order to create an rpgle source member that can use embedded sql, you must use a source type of sqlrpgle. The article uses an example of a subfile with position to capability and presents the techniques and logic changes required to code a modified loadall, expanding or page. On your pc unzip this zip file and upload to ibm iiseriesas400. The closest thing we have had to this before is the retrieve data area command, rtvdtaara, but these gives us more than just the value held in the data area. How do i call an as400 program from command prompt of windows. Jun 18, 2016 this utility can write subfile code for any given sql select statement with little or no user interaction. The following is an rpg subfile example with a selection option.
How to create a subfile program without using any native io. Chg or ur specifies the objects referred to in sql alter, call, comment on, create, drop, grant, label on, rename, and revoke statements and the rows updated, deleted, and inserted are locked until the end of the unit of work transaction. Popular as400 books showing 16 of 6 inside the as400. But surely it was intended as a demonstration of how sql can be used in subfile operations. Jan 02, 2019 i have written about subfiles, and even a screen with two subfiles on it. Check video at topbottom of this page for more details. Oct 01, 2002 rcdctl is the format used as the subfile control format for subfile rcdsfl, and it appears next. August 1992 we begin examining the coding of the display file and hll program along with the logic and structure of typical subfile programs. The source for the display file and the product file used in the example follow the rpg source. 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. May 09, 2016 the subfile record is very simple with just four fields. Each time an entry is received, the data is run through a select routine to deter.
The ibm i information center offers portable document format pdf files for viewing or printing the following topics. I have written about subfiles, and even a screen with two subfiles on it. After clearing the subfile buffer, records equal to the size of sflpag is written. References and related materials db2 for as400 sql programming sc41561103, cdrom qb3aq803 a dspsiz24 80 ds3 a print errsfl. This book is the perfect book for you if you are writing sql on the as400 or using a odbcjdbc to submit sql to the as400. What are the two record formats that a subfile contains. This is a utility to create subfile code for given sql select statement. It takes less than 20 seconds to write complete subfile code. Its a way of embedding the sql statements in our rpg source code. In 2008 system i got unified with system p to become power system. Rpg does not support all of db2 for i data types, if i need to use one of these data types i have to define it with the sqltype keyword and the sql precompiler translate it into a rpg data structure. If journaling is not active on the system, sql audit automatically journals the before and after image of the data updated with sql.
In addition, it shows both the common and uncommon uses of sql in clear, practical examples you can easily repeat. An sqlrpgle program with update, insert, delete capability. 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. This is the full source code for the subfile sort program that appeared in the may 2004 issue of the iseries extra newsletter. Here is a skelton program that uses dynamic sql to load up a subfile. 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. 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. Sfllin subfile line keywor d for display files 212 sflml tchc subfile multiple choice selection list keywor d for display files. This utility can write subfile code for any given sql select statement with little or no user interaction. Rcdctl is the format used as the subfile control format for subfile rcdsfl, and it appears next. Example number of rows returned used to load subfile.
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