Key Field Information, Cross-Reference Table

Compiler Listings

Key Field Information

The Key Field Information section shows information about key fields fo keyed file. It also shows information on any keys that are common to records (that is, common keys). Figure 223 shows an example.

		K e y	F i e l d		I n f o r m a t i o n
File		Internal		External
	Record	field name		field name		Attributes
2 KEYL6
	Common Keys:
						DATE	*ISO- 10
						CHAR	3
	REC1
		FLD12				DATE	*ISO- 10
		FLD13				CHAR	3
		FLD15				CHAR	5
		FLDC				UCS2	5	13488
		FLDCV				VUC2	5	13488
		FLDG				GRPH	5	835
	REC2
		FLD22				DATE	*ISO- 10
		FLD23				CHAR	3
* * * * *	E N D	O F	K E Y	F I E L D		I N F O R M A T I O N			* * * * *

Figure 223. Sample Key Field Information

Cross-Reference Table

The Cross-Reference table contains at least three lists:

¹files and records

¹global fields

¹indicators

In addition, it contains the local fields that are used by each sub table to check where files, fields and indicators are used within th module/program.

Note

that

the informational

message

RNF7031,

which

issued when

ide

not

referenced,

will only

appear

the

cross-reference section

the

the message summary. It does not appear

the

source

section

Names longer than 122 characters, will

appear in the cross-reference s

listing

split

across

multiple

lines.

The

entire

name

will

printed

with

'...' at the end of the lines. If

the

final

portion

the

name

ters, the attributes and line numbers

will be listed starting on the f

Figure 224

page 435

shows an

example

for

the

module

TRANSRPT,

which

two

subprocedures.

this example,

the

Cross-Reference

table shows the line numbers for

ence.

you

specify

OPTION(*SRCSTMT)

instead

OPTION(*NOSRCSTMT),

the

statement

numbers will be displayed for

each

reference

and the

cros

listing

can

extend

beyond

the first

columns

the

listing.

434 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.

IBM AS/400 manual Key Field Information, Cross-Reference Table

Models: AS/400