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Simple Form
DATE.CONVERT (DC)
In the next example, TRAN-DATE with the format YYMMDD is validated. GLB.STATUS
will contain five asterisks (*****) if the date is invalid. There is no output conversion.
The simple form of the DATE.CONVERT; command uses the System Data item
GLB.TOTAL, and is based upon the fixed base date of January 1, 1957. The relative day
number for the base date is zero.
DATE.CONVERT; TO.DATE takes the relative day number from GLB.TOTAL, converts it to
a date, and moves the result into the specified data item. DATE.CONVERT; TO.ALPHA
works in the same way. With both variants, the form of the data item determines the form
of the result date (alphanumeric or numeric form). For more details on valid edit types, see
‘‘Data Item Formats’’, earlier in this section.
DATE.CONVERT; TO.DAYNUMBER takes the date contained in the data item, converts it
to a relative day number, and moves the result into GLB.TOTAL.
If the date involved is invalid, GLB.STATUS is set to *****. Alternatively, the GLB.STATUS;
command may be used to direct the result to a data item. It is important to test for an error
whenever the DATE.CONVERT; command is used.
Syntax of the Simple Form
Restrictions
DDD DDBDD DDBDD DD4
3 3
CDDDD DDDDD4
3 3
@DDDD DDDDY
You cannot use the simple form of the DATE.CONVERT; command with:
$ 8-digit dates
$ Hankaku-Katakana characters
The handling of signed numerics in Group items by the DATE.CONVERT; command varies,
depending on the compiler implementation. If you use numeric items within a Group for
handling dates, they should be unsigned.
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