IBM AS/400 Consecutive Processing, Methods for Processing Disk Files, subsequent, text, describes

Methods for Processing Disk Files

Table 19 on page 292 shows the valid entries for positions 28, 34, and file description specification for the various file types and process

subsequent

text

describes

each

method of

processing.

Table

19.

Processing Methods for DISK Files

Processing

Method

Limits

Record

File

Processing

Address

Organization

(Pos. 28)

Type

(Pos. 35)

(Pos. 34)

Externally

Described

Files

With

Keys

Sequentially

Blank

K

Blank

Randomly

Blank

K

Blank

Sequential

within

limits

L

K

Blank

(by record-address file)

Without

Keys

Randomly/consecutively

Blank

Blank

Blank

Program

Described

Files

With

Keys

(indexed

file)

Sequentially

Blank

A,

D,

G,

P,

I

T,

Z,

or

F

Randomly

Blank

A,

D,

G,

P,

I

T,

Z,

or

F

Sequential

within

limits

L

A,

D,

G,

P,

I

(by record-address file)

T,

Z,

or

F

Without

Keys

Randomly/consecutively

Blank

Blank

Blank

By

record-address

file

Blank

Blank

Blank

As record-address file

Blank

Blank

T

(relative

record

numbers)

As

record-address

limits

fileBlank

A,

D,

G,

P,

Blank

T,

Z,

F,

or

Blank

Consecutive Processing

During consecutive processing, records are read in the order they ap

For

output

and

input

files that

do

not use

random functions

(such

as S

SETGT,

CHAIN,

or

ADD),

the ILE RPG compiler defaults to or operates as

SEQONLY(*YES)

had

been

specified on the CL command OVRDBF (Override with

Database File). (The ILE RPG compiler does not operate as though

SEQONLY(*YES)

had

been

specified

for

update

files.)

SEQONLY(*YES)

allows

multiple records

to

be

placed

in internal

data

management

buffers;

the

then

passed to

the

ILE

RPG compiler

one

at

a

time

on

input.

292 ILE RPG for AS/400 Programmer's Guide