GOODDATE

Purpose

Returns TRUE or FALSE to indicate whether a date is valid for the date type.

Syntax

►►──┬─ GOODDATE ──┬─ ( date, date-format ) ───────────────────────────────────►◄
    └─ GOODDATEX ─┘

Parameters

GOODDATE/GOODDATEX

Invokes the good date function. Use GOODDATEX to test dates that contain the century portion of the year.

date

A numeric value that specifies the input date.

Date can be:

The name of a user-defined variable data field
A user-supplied numeric literal

Note: If you are specifying a Julian date, you must specify a leading zero in the string that the process passes for Julian dates. The leading zero does not apply to non-Julian dates.

date-format

Specifies the date format for which GOODDATE or GOODDATEX tests date.

Date-format can be a string enclosed in quotation marks or a user-defined variable data field containing one of the following:

C for calendar
E for European
G for Gregorian
J for Julian

Example

In this example, GOODDATE tests whether the date type in the user-defined variable, MYDATE, is of date format calendar:

IF (GOODDATE(MYDATE,'C')) THEN
        CALL DATECONV.
ELSE
        CALL DATERROR.