IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[foo_IdGetSensorByType]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
DROP FUNCTION [dbo].[foo_IdGetSensorByType]
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_IdGetSensorByType]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
BEGIN
execute dbo.sp_executesql @statement = N'CREATE FUNCTION [dbo].[foo_IdGetSensorByType]
(
	@SerialNumber	varchar(50)
	,@SensorType		int
)
RETURNS int
AS
BEGIN
		declare @SensorId int

		set @SensorId = 0

		if @SensorType = 0 
		begin
			set @SensorId = isnull((select top 1 Id  from [dbo].[SensorsAnalog] where SerialNumber = @SerialNumber), 0)
		end
		else if @SensorType = 1
		begin
			set @SensorId = isnull((select top 1 Id  from [dbo].[SensorsDigitalIn] where SerialNumber = @SerialNumber), 0)
		end
		else if @SensorType = 2
		begin
			set @SensorId = isnull((select top 1 Id  from [dbo].[SensorsDigitalOut] where SerialNumber = @SerialNumber), 0)
		end
		else if @SensorType = 3
		begin
			set @SensorId = isnull((select top 1 Id  from [dbo].[SensorsSquib] where SerialNumber = @SerialNumber), 0)
		end
		
		return @SensorId

END


' 
END

GO