Methods for Processing Disk Files

EXAMPLE

PROGRAM

2

(Sequential-by-Key Using READ):

This

example

is

the

same

as

the

previous example except that

the

EMPL1 file

is

defined a

procedural file, and the reading of the file is done by the READ o

*****************************************************************

*

PROGRAM NAME:

YTDRPT2

 

 

*

* RELATED FILES:

EMPL1

(Logical

File)

*

*

 

PRINT

(Printer

File)

*

*

DESCRIPTION:

This program shows an example of processing

*

*

 

records using the

read operation code.

*

*

 

This program prints out each employee's

*

*

 

information and weekly hours worked.

*

*****************************************************************

FPRINT

O

F

80

PRINTER

FEMPL1

IF

E

 

K DISK

*The two records (EMPREC and RCWEEK) are contained in the sam￿e

*file, and a record-identifying indicator is assigned to ea￿ch

*record. The record-identifying indicators are used to control

*processing for the different record types. No control levels

*or match fields can be specified for a full-procedural fil￿e.

IEMPREC

01

I*

 

IRCWEEK

02

I*

 

*The READ operation code reads a record from the EMPL1 file￿. An

*end-of-file indicator is specified in positions 58 and 59. If

*the end-of-file indicator 99 is set on by the READ operation￿,

*the program branches to the EOFEND tag and processes the e￿nd-of-

*file routine.

C

 

SETOFF

 

 

12

C

 

READ

EMPL1

 

99

C

99

GOTO

EOFEND

 

 

C*

 

 

 

 

 

C

01

MOVE

ENUM

EMPNO

5 0

C*

 

 

 

 

 

C

 

IF

(*IN02='1') AND (ENUM=EMPNO)

 

C

 

SETON

 

 

12

C

 

ENDIF

 

 

 

*Since EMPL1 is defined as a full-procedural file, indicato￿r

**INLR has to be seton to terminate the program after proces￿sing

*the last record.

C

EOFEND

TAG

 

C

99

SETON

LR

 

 

 

 

Figure

148 (Part

1 of 2).

Sequential-by-Key Processing, Example 2

296 ILE RPG for AS/400 Programmer's Guide

Page 319 Page 321
Page 320
Image 320
IBM AS/400 manual YTDRPT2 Related Files EMPL1, Setoff Read EMPL1 Goto Eofend Move Enum Empno, Seton Endif, Eofend TAG Seton
Page 319 Page 321

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.
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