Data Definition Language (DDL) Reference Manual

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Definition Attributes

Data Definition Language (DDL) Reference Manual—529431-004

6-28

National Data Items

The only symbol you can specify in a national picture string is N or n (except for the

parentheses and a number to specify the length, or number of repetitions).

The maximum length you can specify for a national data item is half of the maximum

internal field length. For definitions, the maximum internal field length is 32767 bytes.

For records, the maximum length depends on the file type:

PIC N(16383) specifies the maximum length allowed for a field definition.

Only COBOL output for a national data item appears as defined in DDL. For other

host-language output, the DDL compiler generates the equivalent number of

characters. For example, PIC N(10) in DDL translates to:

The DDL compiler translates alphanumeric and numeric PICTURE clauses, except

numeric clauses described with USAGE IS COMPUTATIONAL, to C char types. The

DDL compiler translates numeric PICTURE clauses with USAGE IS

COMPUTATIONAL to C short, long, double, and long long types.

If a field described with USAGE IS COMPUTATIONAL has a PICTURE declaration of

the form

PIC 9 ... [(length)] [V 9 ... [(length)]]

and the symbol 9 occurs 10 or more times, the item is declared as TYPE BINARY 64

UNSIGNED.

For more information, see Table C-1, Sample DDL/C Data Translation Table,

page C-1.

File Type Record’s Maximum Internal Field Length

Entry-sequenced 4072 bytes

Key-sequenced 4062 bytes*

Relative 4072 bytes

Unstructured 4096 bytes

* In H06.28/J06.17 RVUs with specific SPRs and later RVUs, the supported

maximum internal field length for a key-sequenced file is 27648 bytes.

For a list of the required H06.28/J06.17 SPRs, see SPR Requirements for

Increased Enscribe Limits for the H06.28/J06.17 Release.

Language Output

C char name [20]

FORTRAN CHARACTER*20

Pascal (on D-series systems) FSTRING (20)

TACL STRUCT name: BEGIN CHAR BYTE (0:19); END;

pTAL or TAL

STRUCT name: BEGIN STRING BYTE [1:20]; END;