Will issue the RNQ1222 inquiry Message, CPF502D, or

Differences Between OPM RPG/400	and	ILE RPG
In ILE RPG, the total number					of	program	devices	that can be	acqui
program		cannot	be	different	from	the maximum number of devices			defi
the	device		file.	OPM RPG/400	allows this		through	the NUM option.

7.In ILE RPG, the ACQ and REL operation codes can be used with sing files.

8.In ILE RPG, the relative record number and key fields in the dat feedback section of the INFDS are updated on each input operation doing blocked reads.

9. When a referential constraint error occurs		in	OPM RPG/400, the		status
set to	"01299" (I/O error). In ILE RPG, the		status code	is	set
"01222", or "01299", depending on the type		of	referential	constraint
occurs:

¹If data management is not able to allocate a record due to a constraint error, a CPF502E notify message is issued. ILE RPG will status code to "01222" and OPM RPG/400 will set the status code "01299".

you

have

error

indicator,

'E'

extender,

INFSR

error

RPG

will issue the RNQ1222 inquiry

message,

and

OPM

RPG/400

will

issue

the

RPG1299

inquiry

message.

The main

difference

between

two

messages is that RNQ1222 allows

you

retry

the

operation.

¹ If

data management detects a referential constraint error

that

issue

either

CPF503A,

CPF502D, or

CPF502F

notify

message, ILE

RPG

will set the status code to

"01022"

and OPM

RPG/400

will

set

status

code

"01299".

you

have

error

indicator,

'E'

extender,

INFSR

error

RPG

will issue the RNQ1022 inquiry

message,

and

OPM

RPG

will

issue

the

RPG1299

inquiry

message.

¹All referential constraint errors detected by data management tha

data	management	to issue an	escape	message will cause both OPM a
ILE	RPG to set	the status	code to	"01299".

10.In ILE RPG, the database-specific feedback section of the INFDS regardless of the outcome of the I/O operation. In OPM RPG/400, th

section is not updated if the record-not-found condition is encounter

11. ILE RPG relies more on data-management error

handling

than does

OPM

RPG/400.

This

means

that

some

cases

you

will

find

certain

error m

the

job log

ILE

RPG

program,

but not

OPM

RPG/400

program.

Some differences

you

will

notice

error

handling

are:

When

doing

UPDATE

on

record

database file that has n

locked

input operation, both

ILE RPG and OPM RPG/400

the status code to "01211". ILE RPG

detects

this

situation

whe

agement

issues

CPF501B

notify

message

and

places

the

job

When

handling

WORKSTN

files

and

trying

I/O

device

tha

not been acquired or defined, both ILE and OPM

RPG

will

set

the

"01281". ILE RPG detects this situation

when

data

management issue

CPF5068

escape message and places it

the

job

log.

12. When

doing

READE,

REDPE

(READPE

ILE),

SETLL

on

database

file,

when doing sequential-within-limits processing by a record-address-file, RPG/400 does key comparisons using the *HEX collating sequence. This ma

376 ILE RPG for AS/400 Programmer's Guide

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.