unqiueidenfitier is not compatible with type int SQL Server Procedure - sql

Question

I have the following procedure for inserting into a user table:
-- ================================================
-- Template generated from Template Explorer using:
-- Create Procedure (New Menu).SQL
--
-- Use the Specify Values for Template Parameters
-- command (Ctrl-Shift-M) to fill in the parameter
-- values below.
--
-- This block of comments will not be included in
-- the definition of the procedure.
-- ================================================
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: Andy Armstrong
-- Create date:
-- Description:
-- =============================================
CREATE PROCEDURE db_SignupAddLogin
-- Add the parameters for the stored procedure here
#LoginName VARCHAR(15),
#LoginPassword VARCHAR(15)
AS
BEGIN
DECLARE #GUID UNIQUEIDENTIFIER
SET #GUID = NEWID();
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- Insert statements for procedure here
INSERT INTO tblMemberLogin
(
UserID,
LoginName,
LoginPassword
)
VALUES
(
#GUID,
#LoginName,
#LoginPassword
)
RETURN #GUID
END
GO
However when I execute it I get the following error:
Msg 206, Level 16, State 2, Procedure db_SignupAddLogin, Line 34
Operand type clash: uniqueidentifier is incompatible with int
I cannot quite workout why as i am not referencing an int anywhere.
My Schema for tblMemberLogin looks like this:
UserID(PK,uniqueidentifier,notnull)
LoginName(nchar(15),not null)
LoginPassword(nchar(15),not null)
Please help!

Answer 1

RETURN can only be used with an int. You can simply use a SELECT query to retrieve the value of variable #GUID.
Reference: http://technet.microsoft.com/en-us/library/ms174998(v=sql.110).aspx

Answer 2

get rid of RETURN #GUID and you should be good to go.

Answer 3

In SQL Server, stored procedures may only return integer values. SQL Server RETURN
If you want to return data from a stored procedure other than an integer, you can use an output parameter: Returning Data from Stored Procedures
You declare the output parameter along with your input parameters:
CREATE PROCEDURE CREATE PROCEDURE db_SignupAddLogin
-- Add the parameters for the stored procedure here
#LoginName VARCHAR(15),
#LoginPassword VARCHAR(15),
#NewGuid UNIQUEIDENTIFIER OUTPUT
AS
BEGIN
SET #NewGuid = NEWID();
-- rest of procedure
END
And then use the output parameter:
DECLARE #NewLoginGuidFromSP UNIQUEIDENTIFIER
EXECUTE db_SignupAddLogin 'Username', 'password', #NewGuid = #NewLoginGuidFromSP OUTPUT;