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sys.sp_cdc_generate_wrapper_function

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Syntax
create procedure [sys].[sp_cdc_generate_wrapper_function]  				
(														
	@capture_instance		sysname = null,
	@closed_high_end_point  bit = 1,
	@column_list            nvarchar(max) = null,
	@update_flag_list		nvarchar(max) = null
)														
as
begin
	set nocount on
	
	declare @retcode int,
		@capture_cnt int,
		@object_id int,
		@quoted_change_table nvarchar(260),
		@db_name sysname
		
    set @quoted_change_table  = N'[cdc].' + quotename(@capture_instance + N'_CT')
	set @db_name = db_name()
		
    -- Verify database is currently enabled for change data capture
    if ([sys].[fn_cdc_is_db_enabled]() != 1)
    begin
		raiserror(22901, 16, -1, @db_name)
        return 1
    end
	
	create table #capture_instances
	(
		capture_instance sysname collate database_default,
		object_id int
	)
	
	create table #create_scripts
	(
		function_name nvarchar(145) collate database_default,
		create_script nvarchar(max) collate database_default
	)
	
	if (@capture_instance is null) or (rtrim(@capture_instance) = N'')
	begin
		-- If the capture instance is not specified, the @column_list and
		-- @update_flag_list parameters must both be null
		if (@column_list is not null) or (@update_flag_list is not null)
		begin
			raiserror(22921, 16, -1)
			return 1
		end

		-- Get a list of potential capture instances.
		exec @retcode = sys.sp_cdc_get_capture_instances null, null
		
		if @retcode <> 0
		begin
			return 1
		end
	end
	else
	begin
		-- Get a list of potential capture instances.
		exec @retcode = sys.sp_cdc_get_capture_instances null, null
		
		if @retcode <> 0
		begin
			return 1
		end
	
		-- If the capture instance is specified, it must exist
		if not exists (
			select capture_instance
			from #capture_instances
			where capture_instance = @capture_instance
		)	
		begin
			raiserror(22920, 16, -1, @capture_instance, @db_name)
			return 1
		end
		
		-- Remove all entries except the one for the named instance
		delete from #capture_instances
		where capture_instance <> @capture_instance
	end
	
	if (@closed_high_end_point is null)
	begin
		set @closed_high_end_point = 1
	end
	
	-- Eliminate from the list any entries that the caller is not
	-- authorized to access
	delete from #capture_instances
	where sys.fn_cdc_has_select_access(capture_instance) = 0
	
	-- If there are no elements in #capture_instances and
	-- an explicit capture instance was entered, return error
	select @capture_cnt = count(*) from #capture_instances
	
	if (@capture_cnt = 0) and (@capture_instance is not null)
	begin
		raiserror(22981, 16, -1)
		return 1
	end
	
	-- Generate wrapper for the capture instances
	exec sys.sp_cdc_generate_wrapper_function_internal  				
		@closed_high_end_point
		,@column_list
		,@update_flag_list
		
	select function_name, create_script from #create_scripts	

	return 0
end																

 
Last revision 2008RTM
See also

  sp_cdc_generate_wrapper_function_internal (Procedure)
sp_MSdrop_cdc (Procedure)
       



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