IBM AS/400 manual Files

SRTSEQ/ALTSEQ

in

an

RPG

Program

versus a DDS

File . . . . . . . . .279.

Chapter

16.

Accessing

Database

Files

. . . . . . . . . . . . . . . .

281. . . .

Database Files . . . . . . . . . . . . . . . . . 281

Physical

Files

and

Logical. .Files. . . . . . . . . . . . . . . . . .281

Data Files and Source .Files. . . . . . . . . . . . . . . . . . . .281

Using Externally Described Disk. . .Files

282

Record Format Specifications

282

Access Path

. . . . . . . . . . . 282

Valid Keys for a Record. . or. . File. . . . . . . . . . . . . . . .285

Record

Blocking

and

Unblocking. . . . . . . . . . . . . . . . . . .287

Using Program-Described Disk . Files. . . . . . . . . . . . . . . . . .288

Indexed File . . . . . . . . . . . . . . . . . 288

Sequential File . . .

. . . . . . . . . . . . . .290

Record Address File. . . . . . . . . . . . . . . . . . . . . . . .290

Methods for Processing Disk . Files. . . . . . . . . . . . . . . . . . .291

Consecutive Processing

. . . . . . . . . . . . . .292

Sequential-by-Key Processing . . . . . . . . . . . . 293

Random-by-Key Processing . .

. . . . . . . . . . . 299

Sequential-within-Limits Processing. . . . . . . . . . . 300

Relative-Record-Number Processing. . . . . . . . . . .303

Valid File Operations

304

Using

Commitment

Control

307

Starting

and Ending

Commitment

Control

307. . . .

Specifying

Files

for

Commitment

Control

309. . . .

Using the COMMIT Operation

309

Specifying

Conditional

Commitment

Control. . . . . . . . . . . . . . .311. . .

Commitment

Control

in

the

Program

Cycle. . . . . . . . . . . . . . .312. . .

DDM Files

. . . . .

. . . . . . . . . . . . . 312

Using Pre-V3R1 DDM Files. . . . . . . . . . . . . . . . . . . . .313

Chapter

17.

Accessing

Externally

Attached

Devices

. . . . . . . . . .

315. .

Types of Device .Files. . . . . . . . . . . . . . . . . . . . . . . .315

Accessing Printer Devices

316

Specifying PRINTER Files. . . . . . . . . . . . . . . . . . . . . .316

Handling

Page Overflow

316

Using the Fetch-Overflow Routine in Program-Described. . . . .Files. .320

Changing Forms Control Information in a Program-Described. . . .File.

323

Accessing Tape Devices

325

Accessing Display Devices

326

Using Sequential Files. . . . . . . . . . . . . . . . . . . . . . . . .326

Specifying a Sequential. File. . . . . . . . . . . . . . . . . . . .326

Using

SPECIAL

Files

. . . . . . . . . . . . . . . . . . . . . . . . .327

Example of Using a Special. .File. . . . . . . . . . . . . . . . .329

Chapter

18.

Using

WORKSTN

Files

. . . . . . . . . . . . . . . . .

331

Intersystem

Communications

Function

331

Using Externally Described WORKSTN .Files

331. . . .

Specifying Function Key Indicators on Display. .Device. . . .Files. . 334.

Specifying Command Keys on Display Device. .Files

334. .

Processing

an

Externally

Described

WORKSTN. .File

335. .

Using Subfiles . . .

. .

. . . . . . . . . . . .335

Using

Program-Described

WORKSTN

Files

338. . . .

Using a Program-Described

WORKSTN

File

with a Format. . .Name. .

339

viii ILE RPG for AS/400 Programmer's Guide