IBM AS/400 manual Modify an, Description, Using Input Specifications, External

Defining Externally Described Files

Once a record-format is ignored, it cannot be specified for any ot (SFILE, RENAME, or INCLUDE), or for another IGNORE.

Ignored record-format names appear on the cross-reference listing, bu flagged as ignored.

To indicate that a record format from an externally described file, enter the keyword and parameterrecordIGNORE(-format name) on the file description specification in the Keyword field.

Alternatively, the INCLUDE keyword can be used to include only those format names that are to be used in a program. All other record f in the file will be excluded.

*.. 1 ...+... 2 ...+... 3 ...+... 4 ...+... 5 ...+... 6 ...+... 7 ...+... * FFilename++IPEASFRlen+LKlen+AIDevice+.Keywords+++++++++++++++++++++++++++++

*

*Assume the file ITMMSTL contains the following record for￿mats:

*EMPLNO, NAME, ADDR, TEL, WAGE. To make the program run as if only the

*EMPLNO and NAME records existed, either of the following t￿wo methods

*can be used:

*
FITMMSTL	UF	E	K DISK	IGNORE(ADDR:TEL:WAGE)
*
* OR:
*
FITMMSTL	UF	E	K DISK	INCLUDE(EMPLNO:NAME)
*
Figure 132.		IGNORE Keyword for Record Formats in an Externally Described File

Using Input Specifications

to

Modify an

External

Description

You can use the input specifications to override certain information

description

of an input file or

to

add

RPG

functions

to

the externa

the input

specifications,

you

can:

¹

Assign

record-identifying

indicators

to

record formats

as shown

in

on

page 268.

¹

Rename

a field as shown in

Figure 133

on

page 268.

¹

Assign

control-level

indicators

to

fields

as

shown in

Figure 133

on p

¹Assign match-field values to fields for matching record processing

Figure 134 on page 268.

¹ Assign field indicators as shown in Figure 134 on page 268.

You cannot use the input specifications to override field locations

described file. The fields in		an externally	described file	are	pla
the order in which they	are	listed in the	data description	specif
device-dependent functions	such as forms control, are not valid			in	an
for externally described	files.

Note: You can explicitly rename a field on an input specification, ev PREFIX keyword is specified for a file. The compiler will reco require) the name thatusedis infirstyour program. For example, if you specify the prefixed name on an input specification to associa

Chapter 14. Defining Files267