SQL - IsNullOrWhiteSpace Function

Just another SQL Code-snippet to check for NULL or whitespace value:

-- =============================================
-- Author: John Wood
-- Create date: 20151129
-- Description: Returns a boolean value
-- =============================================
ALTER FUNCTION [Int].IsNullOrWhiteSpace (
-- Add the parameters for the function here
@val sql_variant
) RETURNS bit
AS
BEGIN
declare @ret bit
if(SQL_VARIANT_PROPERTY(@val, 'BaseType') in ('varchar', 'nvarchar', 'char', 'nchar')) begin
declare @char varchar = cast(@val as varchar)
select @ret = iif(ltrim(rtrim(@char)) = '', 1, 0)
end else begin
-- Return the result of the function
select @ret = iif( @val IS NULL, 1, 0 )
end
return @ret
END
GO

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