IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[foo_DBExportSensors]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
DROP FUNCTION [dbo].[foo_DBExportSensors]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[foo_DBExportSensors]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
BEGIN
execute dbo.sp_executesql @statement = N'CREATE FUNCTION [dbo].[foo_DBExportSensors]
(
)
RETURNS xml
AS
BEGIN
	RETURN isnull((select    [dbo].[foo_DBExportSensorsAnalog]()
							,[dbo].[foo_DBExportSensorsDigitalInput]()	
							,[dbo].[foo_DBExportSensorsDigitalOut]()		
							,[dbo].[foo_DBExportSensorsSquib]() 
					for xml path(''''), root(''Sensors''), BINARY BASE64), ''<SensorData />'')
END
' 
END

GO