How to use GetDate() or GetUTCDate() from a User Defined Function?

This FAQ is linked to my other FAQ which helps to return the SQL Server TIMEZONE from a User Defined Function.

Due to SQL determinism; If you try to use the GetDate() or GetUTCDate() function within a User Defined Function, you will get an error message:
Error 443: Invalid use of 'getdate' within a function.
-or-
Error 443: Invalid use of 'getutcdate' within a function.

If you want to return the CURRENT GMT/UTC time on the SQL Server, you need to do:

1. You create VIEW first:
[color blue]CREATE VIEW dbo.SYS_GetUTCDateTime
AS
SELECT GETUTCDATE() AS UTCDateTime[/color]

2. You create a USER DEFINED FUNCTION:
[color blue]CREATE FUNCTION dbo.fniGetUTCDateTime( )
RETURNS DATETIME AS
BEGIN
DECLARE @vdUTC DATETIME
SELECT @vdUTC = UTCDateTime FROM SYS_GetUTCDateTime
RETURN @vdUTC
END[/color]

Replace the GetUTCDate() with GetDate() if you just want to return the current server local (system) time.