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sys.sp_MSsubtractbm

  No additional text.


Syntax
create procedure sys.sp_MSsubtractbm
	@bm1 varbinary(128),
	@bm2 varbinary(128),
	@bmout varbinary(128) output
as
	declare @len1 int
	set @len1= datalength(@bm1)
	declare @len2 int
	set @len2= datalength(@bm2)

	declare @idx int
	set @idx= 1

	while @idx <= @len2
	begin
		if 1=@idx
		begin
			set @bmout= cast(substring(@bm1, @idx, 1) as tinyint)  cast(substring(@bm2, @idx, 1) as tinyint)
			if @@error<>0 return 1
		end
		else
		begin
			set @bmout= @bmout + cast(cast(substring(@bm1, @idx, 1) as tinyint)  cast(substring(@bm2, @idx, 1) as tinyint) as varbinary)
			if @@error<>0 return 1
		end

		set @idx= @idx+1
	end

	if @len1 > @len2
	begin
		set @bmout= @bmout + substring(@bm1, @idx, @len1-@len2)
		if @@error<>0 return 1
	end

	return 0

 
Last revision 2008RTM
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