Figure 177 shows some examples of how to define and move 2- and 4-digit year dates between date fields, or between character and date fields.
*..1....+....2....+....3....+....4....+....5....+....6....+....7...+....
* Define two 8-byte character fields.
D CHR_8a s 8a inz('95/05/21')
D CHR_8b s 8a inz('abcdefgh')
*
* Define two 8-byte date fields. To get a 2-digit year instead of
* the default 4-digit year (for *ISO format), they are defined
* with a 2-digit year date format, *YMD. For D_8a, a separator (.)
* is also specified. Note that the format of the date literal
* specified with the INZ keyword must be the same as the format
* specified on the * control specification. In this case, none
* is specified, so it is the default, *ISO.
*
D D_8a s d datfmt(*ymd.)
D D_8b s d inz(d'1995-07-31') datfmt(*ymd)
*
* Define a 10-byte date field. By default, it has *ISO format.
D D_10 s d inz(d'1994-06-10')
*
* D_10 now has the value 1995-05-21
*
* Move the 8-character field to a 10-character date field D_10.
* It will contain the date that CHR_8a was initialized to, but
* with a 4-digit year and the format of D_10, namely,
* 1995-05-21 (*ISO format).
*
* Note that a format must be specified with built-in function
* %DATE to indicate the format of the character field.
*
/FREE
D_10 = %DATE (CHR_8a: *YMD);
//
// Move the 10-character date to an 8-character field CHR_8b.
// It will contain the date that was just moved to D_10, but with
// a 2-digit year and the default separator indicated by the *YMD
// format.
//
CHR_8b = %CHAR (D_10: *YMD);
//
// Move the 10-character date to an 8-character date D_8a.
// It will contain the date that * was just moved to D_10, but
// with a 2-digit year and a . separator since D_8a was defined
// with the (*YMD.) format.
//
D_8a = D_10;
//
// Move the 8-character date to a 10-character date D_10
// It will contain the date that * D_8b was initialized to,
// but with a 4-digit year, 1995-07-31.
//
D_10 = D_8b;
//
// After the last move, the fields will contain
// CHR_8b: 95/05/21
// D_8a: 95.05.21
// D_10: 1995-07-31
//
*INLR = *ON;
/END-FREEThe following example shows how to convert from a character field in the form CYYMMDD to a date field in *ISO format. This is particularly useful when using command parameters of type *DATE.
The RPG program is only intended to be called using the command interface, so it is not necessary to specify a prototype for the program. The prototype will be implicitly defined by the compiler using the information in the procedure interface.
CMD PROMPT('Use DATE parameter')
PARM KWD(DATE) TYPE(*DATE) *..1....+....2....+....3....+....4....+....5....+....6....+....7...+....
* Procedure interface for this program (no prototype is necessary)
D FIG210 PI EXTPGM('FIG210')
D DateParm 7A
* Declare a date type with date format *ISO.
D ISO_DATE S D DATFMT(*ISO)
* The format of the DateParm parameter is CYYMMDD, so code
* *CYMD0 as the 2nd parameter of built-in function %DATE.
/FREE
ISO_DATE = %DATE (DateParm: *CYMD0);
/END-FREE