Qual

program/procedure		call(continued)	Reclaim Activation Group (RCLACTGRP) command
recursive	calls	130	deleting activation groups 112
returning from a called program			or procedure named152 activation		groups	110
returning	values	134	Reclaim	Resources	(RCLRSC)	command
returning	without	ending 154	ILE	program 26

static

calls

128

OPM-compatible program 24

using the CALL operation 148

free

storage

112

using the CALLB operation 148

RECNO

keyword

within

ILE 19

with relative-record-number processing 303

program/procedure

end

record

abnormal

end

153

limits

291

after

system

call

109

locking

276

normal

end

152

releasing

276

return

overview

152

valid

keys

285

returning

without

ending 154

record

address

file

using

bindable

APIs

155

conversion

problems

392,

400

programming

tips

relative-record number 290

creating

NOMAIN

module

sequential-within-limits 290

setting

subprocedure

breakpoints 196

with

limits

records

291

prologue section of compiler listing 424

with relative record numbers 290

prototype

record

address

limits

file

description

See record

address

file

using

133

record

address

relative

record number file

prototyped

call

See record

address

file

order of evaluation of parameters 146

record

format

prototyped

program

procedure

for a

subfile

335

prototyped

call

ignoring

266

PRTCTL (printer

control)

renaming

266

example

324

specifications for externally described file 282

general

information

323

record length of files, conversion considerations 380

record

locking 276

recursion

calling

condition

handlers 238

debug

command

recursive

calls

46,

130

definition

164

redirection,

file

ILE

RPG

208

definition

262

querying

names of

called

programs/procedures 149

description

262

general

reducing object size 88, 166

Call

Stack Entry

Termination User Exit

Procedure(CEERTX)

244

random-by-key

processing

ILE

Condition Handler (CEEHDLR) API 238

example

299

relative record number record address file

general

discussion 299

See record

address

file

RCLACTGRP

command

relative-record number 291

See Reclaim

Activation

Group (RCLACTGRP)

relative-record-number processing 303

command

releasing

locked record 276

RCLRSC

command

removing

breakpoints

See Reclaim

Resources

(RCLRSC)

command

about

177

reading

record

342

all

188

reading

record

conditional

job

breakpoints 181

with

WORKSTN

subfile 337

conditional

thread

breakpoints

187

REALLOC

(reallocate

storage with

new

length) opera-

job

breakpoints

178

tion

code

113

unconditional

thread

breakpoints

180

Reallocate

Storage

(CEECZST)

bindable

API 20

using

statement

numbers

185

rebinding

removing

objects from

debug

session 172

Index 459

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.

IBM AS/400 manual Qual

Models: AS/400

QUAL

AS/400 specifications